Topic 9 of 92: Seismology: Earthquakes - The Science and Updates on Current Activity
Sat, Jul 10, 1999 (23:39) |
Marcia (MarciaH)
Earthquakes are monitored world wide. When the earth moves under you feet and you do not know why, look here for your local update.
637 responses total.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 1 of 637: Wolf (wolf) * Sun, Jul 11, 1999 (17:31) * 1 lines
Is there a site where we can find current faultlines?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 2 of 637: Marcia (MarciaH) * Sun, Jul 11, 1999 (19:03) * 5 lines
The quick answer is there is no good one that I know of but have sent the request to my family expert. Usually they appear as a line of earthquakes as in
http://www.geophys.washington.edu/CNSS/us.epi.gif
I will search it further. At this URL you will find links to your area which is about as stable as it is possible to get. Water is your enemy, not the earth beneath it! http://quake.wr.usgs.gov/QUAKES/CURRENT/current.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 3 of 637: Marcia (MarciaH) * Sun, Jul 11, 1999 (19:15) * 19 lines
For my current seismic activity for my location Check out the zoomable map at the bottom of the page.
http://quake.wr.usgs.gov/cgi-bin/quake/tako.wr.usgs.gov/db=usa/river=1/fed.=1
YY MM DD HH MM SS Lat Long Depth Mag Q Point of Reference
|| || || || || || ||.|| |||.|| ||.| |.| |
99/07/08 02:55:54 19.32N 155.09W 5.1 2.6MGN B* 5 mi. S of Puu O'O
99/07/08 03:04:16 19.33N 155.09W 2.3 2.6MGN B* 4 mi. S of Puu O'O
99/07/08 07:49:36 19.19N 155.45W 18.3 2.0MGN C* 2 mi. ESE of Pahala
99/07/08 16:38:48 19.73N 155.80W 0.9 2.4MLG B* 15 mi. ENE of Kailua-Kona
99/07/10 09:27:57 19.34N 155.13W 0.3 2.3MGN A* 4 mi. SSW of Puu O'O
99/07/10 12:53:58 19.33N 155.12W 3.3 2.2MGN C* 4 mi. SSW of Puu O'O
99/07/10 13:09:45 19.70N 155.82W 31.3 2.2MLG B* 13 mi. ENE of Kailua-Kona
99/07/10 15:52:23 19.36N 155.08W 1.4 2.3MGN B* 2 mi. SE of Puu O'O
99/07/10 22:44:05 19.49N 155.35W 14.7 2.0MGN A* 18 mi. WNW of Puu O'O
99/07/10 23:09:06 19.35N 155.07W 1.8 2.5MGN B* 3 mi. SE of Puu O'O
----------------------------------------------
<> Last update was on 10-JUL-1999 23:11 HST
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Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 4 of 637: Marcia (MarciaH) * Sun, Jul 11, 1999 (21:48) * 17 lines
David has come through for me and here are his suggestions for fault maps:
There are several related sources. You may like the ABAG site with
forecast damage estimate maps:
http://www.abag.ca.gov/bayarea/eqmaps/eqmaps.html
and
http://www.geophys.washington.edu/seismosurfing.html
The best simple fault map is on the CA quake pages at:
http://quake.wr.usgs.gov/recenteqs/
Be sure to check the Bay Area version cause it has lots of what folks will
want to see.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 5 of 637: lidya maccarthy (livamago) * Tue, Jul 13, 1999 (22:08) * 1 lines
Marcia, there was some seismic activity in Central America this weekend. Can you find the particulars? I had conflicting reports.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 6 of 637: Marcia (MarciaH) * Tue, Jul 13, 1999 (23:21) * 7 lines
There were two Earthquakes in Honduras:
99/07/11 20:09:21 15.71N 88.51W 10.0 4.4Mb B HONDURAS
99/07/11 20:17:25 15.29N 88.38W 10.0 4.3Mb B HONDURAS
Maps and more information is available at
http://quake.wr.usgs.gov/cgi-bin/quake/
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 7 of 637: Marcia (MarciaH) * Tue, Jul 13, 1999 (23:21) * 7 lines
There were two Earthquakes in Honduras:
99/07/11 20:09:21 15.71N 88.51W 10.0 4.4Mb B HONDURAS
99/07/11 20:17:25 15.29N 88.38W 10.0 4.3Mb B HONDURAS
Maps and more information is available at
http://quake.wr.usgs.gov/cgi-bin/quake/
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 8 of 637: Gi (patas) * Tue, Jul 27, 1999 (08:35) * 3 lines
Lisbon is in a seysmic zone, and after the "big one" in 1755 that was followed by a tidal wave and fires that dertroyed most of the city, we have never felt quite safe again.
There was a reasonably strong earthquake in 1968 (I'm writing from memory and haven't checked the particulars so cannot give you any numbers)but people say it "wasn't it", they still fear a bigger one!
I was very young and living in Madeira in 68, but woke up in the night and felt the quake.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 9 of 637: Wolf (wolf) * Tue, Jul 27, 1999 (09:59) * 1 lines
when my father was stationed in san francisco, we had an earth tremor. just a baby at the time, so i remember nothing about it.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 10 of 637: Marcia (MarciaH) * Tue, Jul 27, 1999 (13:02) * 1 lines
You need to move to a more active place than you are now...You have just about no chance of feeling a really fun Earth quake in La Belle Lousiana
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 11 of 637: Wolf (wolf) * Tue, Jul 27, 1999 (17:31) * 1 lines
no thanks, that's one experience i think i'll pass on (i mean, no guarantees, right?)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 12 of 637: Marcia (MarciaH) * Tue, Jul 27, 1999 (18:32) * 1 lines
The only guarantee is No Guarantees!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 13 of 637: wer (KitchenManager) * Tue, Jul 27, 1999 (20:09) * 1 lines
kind of like posting on the Spring...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 14 of 637: Wolf (wolf) * Tue, Jul 27, 1999 (20:13) * 1 lines
so true, we're lucky to stay on topic!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 15 of 637: wer (KitchenManager) * Tue, Jul 27, 1999 (20:49) * 3 lines
we're lucky if we can still keep
it in sight while we're straying
away!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 16 of 637: Marcia (MarciaH) * Tue, Jul 27, 1999 (20:56) * 1 lines
That's odd. I thought we were posting on the Spring (as I drag my seismograph and stand along behind me...)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 17 of 637: wer (KitchenManager) * Tue, Jul 27, 1999 (22:50) * 1 lines
any conclusions yet?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 18 of 637: Karen (KarenR) * Wed, Jul 28, 1999 (00:18) * 2 lines
You have just about no chance of feeling a really fun Earth quake in La Belle Lousiana
Now hold your beignets! They could probably feel something from that New Madras fault. A long, long time ago, when I was visiting older sis in college down at U ofI, I got woken up by earth tremors coming from that region. Chicago can get them, so they probably head south as well.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 19 of 637: Karen (KarenR) * Wed, Jul 28, 1999 (00:23) * 1 lines
...unless it's too soggy down there
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 20 of 637: Marcia (MarciaH) * Wed, Jul 28, 1999 (10:55) * 3 lines
(Karen)...unless it's too soggy down there
That's my guess. It mostly depends on your substrate. If you are on the same plate and the same portion of the bedrock, you will be able to feel a strong one from quite far away. It is on this principle that seismographs work. The ones at the epicenter are knocked off-line almost instantaneously with a local earthquake, so the magnitude and epicenter have to be extrapolated from the data obtained from the network of Seismic stations around the world. At the Hawaii Volcanoes Observatory, where ours are
located, the Good Friday quake in Alaska some years ago made a very impressive readout. I think it is still on display. However, that said, the New Madrid Fault quakes have changed the course of the Mississippi, so it just might have been felt in Lousiana, despite the dampening effect of the bog on which it sits.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 21 of 637: Karen (KarenR) * Wed, Jul 28, 1999 (12:25) * 5 lines
New Madrid, well, I knew it started with an M!! Strange though that I did a search on Yahoo! and an article there talked about the New Madras Fault as well. According to these two site, the fault cuts across 5 states, but none mentioned affecting Louisiana, excepting as you said Marcia the course of the Mississippi!!
http://www.ceri.memphis.edu/www/public_info/faultfacts.html
http://quake.ualr.edu/public/nmfz.htm
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 22 of 637: Marcia (MarciaH) * Wed, Jul 28, 1999 (15:48) * 1 lines
Oh Karen..thanks for the links. For those not knowing, Madrid in Spain is not the way they pronounce it for the New Madrid Fault. This case is pronounced MAA-drid (accent on the first syllable.)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 23 of 637: Karen (KarenR) * Wed, Jul 28, 1999 (16:22) * 3 lines
I was going to mention the difference in pronunciation (as all foreign place names in the Midwest), but didn't think Geo was the place. ;-D Although, I would add another D in there. MAAD-drid.
My fav is upriver in Cairo, Il. You know how that's pronounced? BTW, we're relevant here as Cairo is along the fault line.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 24 of 637: Karen (KarenR) * Wed, Jul 28, 1999 (16:24) * 1 lines
Wolf could add the La. versions of French words, like the street names in Nawlins.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 25 of 637: Marcia (MarciaH) * Wed, Jul 28, 1999 (19:40) * 2 lines
KAY row we all have our regional peculiarities. In Maine Calais is pronounced
Callous (like on the bottom of your foot!)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 26 of 637: Gi (patas) * Thu, Jul 29, 1999 (03:16) * 1 lines
WoW! I like to learn these things to. To talk of such places with the right pronunciation makes one sound *very* cool! (Like one has been there) ;-)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 27 of 637: Marcia (MarciaH) * Thu, Jul 29, 1999 (11:47) * 1 lines
(Fun, is it not!!) In Pennsylvania they are very capricious with their French place-names. Charleroi (Charles-le-Roi) is pronounced the French way (excepting the roi part which is pronounced roy), but DuBois is DOO bose. Amazing!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 28 of 637: Karen (KarenR) * Thu, Jul 29, 1999 (14:01) * 1 lines
In Wisconsin (or is it Michigan or maybe it's Illi-NWA), there is a Charlesvoix, pronounced: SHAR-le-voy. A little bit of both.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 29 of 637: Karen (KarenR) * Thu, Jul 29, 1999 (14:08) * 1 lines
Another: in Illi-NWA, we have a lot of French place names because of Joliet and Champlain--one of them was a Pere, forget which). South of Chicago, is Bourbonnais. Have heard it pronounced: Bur-BON-is and Bur-bon-aze.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 30 of 637: Karen (KarenR) * Thu, Jul 29, 1999 (14:10) * 1 lines
and Marseilles, which is of course: Mar-SAILS
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 31 of 637: Wolf (wolf) * Thu, Jul 29, 1999 (17:51) * 1 lines
well, and then there's nacogdotches and nacodetches (or something like that). in LA, it's nack-ah-dish and in texas, it's nack-ah-doe-chez. i think they're even spelled the same way!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 32 of 637: Marcia (MarciaH) * Thu, Jul 29, 1999 (18:37) * 1 lines
Ok, people, admit it. When you wear the cloth of kings (whether wide wale or narrow) you call it Cor-doo-roy or Cor-der-roy ...not Cord-Du-Roi
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 33 of 637: Wolf (wolf) * Thu, Jul 29, 1999 (18:42) * 1 lines
i call it yucky! *smile*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 34 of 637: Karen (KarenR) * Thu, Jul 29, 1999 (19:25) * 4 lines
oops, and it was Pere Marquette in that little canoe...
you call it Cor-doo-roy or Cor-der-roy ...not Cord-Du-Roi
depends on if it's been good or bad and if it's going to get any supper that night! ;-p
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 35 of 637: Marcia (MarciaH) * Fri, Jul 30, 1999 (00:03) * 1 lines
*lol* how do you think up these comments! Especially after a ziooion hours a day doing this - like me - but I am almost brain-dead at this point.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 36 of 637: Karen (KarenR) * Sun, Aug 8, 1999 (17:59) * 1 lines
Being brain-dead is a requirement. ;-p
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 37 of 637: Marcia (MarciaH) * Sun, Aug 8, 1999 (18:45) * 1 lines
You know, I wondered about those electrodes they afixed to my scalp before turning this Conference over to my care. No business going on in here - I think I'll go up to the observatory and jump up and down on their seiso-cables. You see tourist and little kids doing that all the time. Very funny! And quite undetectable.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 38 of 637: Marcia (MarciaH) * Fri, Aug 13, 1999 (14:14) * 3 lines
Here is an excellent source of information for teachers (which also means parents) This particular issue is about Natural Disasters and overcoming
science myths (that is what they said!)
http://www.earthsky.com/Teachers/Booklet/natural_disasters.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 39 of 637: wer (KitchenManager) * Fri, Aug 13, 1999 (23:34) * 2 lines
I wonder if ratthing heard that...and what he'd
have to say on the topic of "science myths"...?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 40 of 637: Marcia (MarciaH) * Fri, Aug 13, 1999 (23:41) * 1 lines
I wondered about that, too. I was busy today so I did not check out the URL as thoroughly as I usually do...shall report tomorrow...stayed tuned!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 41 of 637: Marcia (MarciaH) * Mon, Aug 16, 1999 (19:49) * 1 lines
We have just experienced a 4.5 Earthquake. I thought a hurricane would be about all I needed to make my day complete...until now!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 42 of 637: Karen (KarenR) * Tue, Aug 17, 1999 (18:12) * 1 lines
Nothing on the 7.1 earthquake in Turkey? Get out of the Bath, Marcia! ;-o
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 43 of 637: Marcia (MarciaH) * Tue, Aug 17, 1999 (20:42) * 2 lines
I was waiting to see if anyone else was aware of it while I waited for Cal Tech to update their stuff and give me something more substantial to post. Willl check in again and post what I can find.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 44 of 637: Wolf (wolf) * Tue, Aug 17, 1999 (21:15) * 1 lines
msn on line is reporting 1000 dead but the news says 2000 and thousands missing. they're having aftershocks and fear an even bigger quake during the night. let's pray not.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 45 of 637: Marcia (MarciaH) * Tue, Aug 17, 1999 (21:31) * 158 lines
Since the Earthquake resources are still not reporting anything, I went to The Times of London for information:
http://www.sunday-times.co.uk:80/news/pages/Times/frontpage.html?1319194
bul toll rises to more than 2,000
©
A young girl is carried out of the wreckage of her demolished
home in Istanbul after the quake yesterday
Photograph: AP
Turks call for
earthquake aid
BY ANDREW FINKEL IN IZMIT
TURKEY was counting its dead yesterday after a
major earthquake devastated western parts of the
country. More than 2,000 people are believed to
have been killed over a wide area from the
extreme western Istanbul suburb of Halkali to Asia
and the industrial city of Izmit about 60 miles to the
east. At least 11,000 are thought to have been
injured.
Survivors tore at mangled steel and concrete to
free loved ones, and officials asked the
international community to send sniffer dogs and
lifting equipment to help in the rescue.
The whole region shook for 45 seconds at 3.02 am
local time (1.02 BST) yesterday, driving millions of
people from their beds out into the street. Turkish
seismologists calculated the initial tremor at 6.7 on
the Richter scale. But the British Geological
Survey, Harvard University and other centres
around the world later calculated the magnitude as
at least 7.5.
The tremor was felt with violent intensity in the
capital Ankara, some 270 miles from the epicentre
in a fault segment running from Izmit to Lake
Sapanca.
Bulent Ecevit, the Turkish Prime Minister,
appeared close to tears during a visit to
devastated towns. "The loss is huge," he said in a
trembling voice."It is the biggest natural disaster I
have witnessed. May Allah help our state and our
people."
Most of the
those who died
were killed as
they slept when
substandard
buildings
collapsed. The
Istanbul
neighbourhood
of Avcilar, far
from the
epicentre, was
badly hit.
The stricken region also includes Yalova, Bursa,
Adapazari, Bolu and Eskisehir - an area which
defines the industrial and commercial heartland of
Turkey and to emphasise the point smoke billowed
from the country's main oil refinery at Izmet.
The naval base at Golcuk across Izmit Bay was
also badly hit. A handover of command ceremony
had taken place on Monday and many high-ranking
officers had decided to stay overnight. Twenty
bodies were recovered and more than 200 were
missing feared dead.
While most of the structural damage was to blocks
of flats, the early 16th-century Beyazid Mosque in
Istanbul was one of the few historical buildings to
suffer substantial damage.
Along the highway approach to Izmit, some
apartment blocks looked as if someone had taken
an axe to split them in two, and the force of the
quake turned one five-storey block in the town of
Korfez on to its side. Other buildings simply
collapsed one floor on top of the other with
mattresses and carpets sticking out at the end to
define the layers. The minaret on the town's
mosque lay draped over the building like a limp
sock.
Many of those trapped under the rubble were taken
to Izmit state hospital, which presented a scene
reminiscent of the Inferno. A car park littered with
bandages and surgical gloves was converted into
an emergency ward with relatives holding up
pieces of cardboard to shade loved ones as their
wounds were being stitched. Inside, three of the
four operating theatres were in constant use, even
although there was no city water and the
emergency electrical generator was not working.
The corridors of the hospital were filled with the
injured, while those not in a critical condition were
taken to the park across the street.
"I don't know if I should be thinking of myself or my
family," said a dazed 20-year-old sitting outside, a
saline drip suspended from a railing and his face
still caked in blood. He was one of the lucky ones
who had been rescued within the first hour and
brought in to have his arm, broken in three places,
mended. He had no knowledge of the fate of his
parents or younger brother, still missing in the
rubble.
Turkey has in the past been unwilling to accept
international assistance after an earthquake, but
Mr Ecevit, who was manning a special crisis
centre, made clear that there would be no such
reluctance this time. He urged international
organisations to be patient as there might be
logistical problems in getting aid to where it was
needed most.
He also urged Turks to refrain from using
bulldozers to clear the wreckage, warning them
that such powerful intervention might kill those
trapped in air pockets. "Some of our citizens who
lost their loved ones under wreckage demand
heavy machinery to clear it and save their relatives.
But if we do this we can lose more people than we
save. So we have to be patient and wait," he said.
Britain sent a team of 42 experts including
firefighters and those trained in search-and-rescue
operations, and other countries - including some
that have been at odds with Turkey - promised
help. Greece offered crews experienced in
recovering survivors from ruined buildings.
Bill Richardson, the US Energy Secretary, who
was in Istanbul, consulted his Turkish counterpart
about American assistance, and President Clinton
said: "Turkey has been our friend and our ally for a
long time now. We must stand with them and do
whatever we can to help them get through this
terrible crisis."
Two Britons were among the wounded, neither of
them with life-threatening injuries. A schoolboy who
had been listed as missing was found safe.
Next page: Andrew Finkel reflects on the tremor
aftermath
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 46 of 637: Wolf (wolf) * Tue, Aug 17, 1999 (21:40) * 1 lines
i believe we're sending in search and rescue troops out of virginia. the best in the country (not military). i can only imagine what contracting must be like over there right now (i.e., the military bases etc.) and i have a friend who will be moving there with his family next week. :(
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 47 of 637: Marcia (MarciaH) * Tue, Aug 17, 1999 (21:44) * 1 lines
You don't want to know...Those search and rescue teams with the sniffer dogs are veterans of the Mexico City quake and numerous others. They are the best in the world at that unhappy task. We can all be grateful that they are willing to do it.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 48 of 637: Wolf (wolf) * Tue, Aug 17, 1999 (21:50) * 1 lines
indeed, so!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 49 of 637: Marcia (MarciaH) * Wed, Aug 18, 1999 (00:28) * 7 lines
My son reports that a rode out a 5.0 earthquake in central California
MAG DATE LOCAL-TIME LAT LON DEPTH LOCATION
y/m/d h:m:s deg deg km
5.0 99/08/17 18:06:18 37.91N 122.69W 6.9 0 mi SSW of BOLINAS
More information is available at this URL:
http://quake.wr.usgs.gov/recenteqs/Quakes/quakes.big.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 50 of 637: Wolf (wolf) * Wed, Aug 18, 1999 (10:31) * 1 lines
the numbers in turkey are over 3500 dead and still 10's of thousands missing. from what i understand, none of the us military bases were hit.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 51 of 637: Marcia (MarciaH) * Wed, Aug 18, 1999 (12:56) * 1 lines
That is my understanding at this hour. Two sniffer-dog rescue units are there from the US...one from Virginia and one from Florida - to be joined by units from Japan and other countries, including Greece, its arch-enemy. In times like this, national disputes seem very petty, indeed!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 52 of 637: Karen (KarenR) * Wed, Aug 18, 1999 (14:29) * 5 lines
eh, eh, eh. Last night on the news, they said the largest contingent to come over was from Israel.
Having been to Turkey fairly recently (less than 2 yrs ago) I think the US AF bases are northeast from this area, along the Black Sea--as close as they dared to the former Soviet Union.
Am amazed that those historic buildings in Istanbul are still standing. 7.4 on the scale, they say.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 53 of 637: Marcia (MarciaH) * Wed, Aug 18, 1999 (15:35) * 15 lines
http://wwwneic.cr.usgs.gov/neis/bulletin/990817000138.HTML
99/08/17 00:01:38 40.69N 29.82E 10.0 7.4Mw
TURKEY
The following is a release by the United States Geological Survey, National Earthquake Information Center: A major
earthquake occurred about 55 miles (90 km) east-southeast of Istanbul or about 165 miles (270 km) west-northwest of
Ankara at 6:02 PM MDT, Aug 16, 1999 (Aug 17 at 3:02 AM local time in Turkey). A PRELIMINARY MAGNITUDE OF
7.8 WAS COMPUTED FOR THIS EARTHQUAKE. The magnitude and location may change slightly as additional data
are received from other seismograph stations.
At least 2,000 people killed, 10,000 injured, many missing and extensive damage in the Istanbul-Adapazari area.
Much of the damage and casualties occured in the provinces of Kocaeli and Sakarya. Felt as far east as Ankara.
There is discussion that the California quake David felt was the compression wave travelling around the earth (see diagram in above url.) Turkey is on a plate boundary, and any movement on a plate boundary makes all of the other plates move. The San Andreas fault quake yesterday in California is the result.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 54 of 637: Wolf (wolf) * Wed, Aug 18, 1999 (18:00) * 1 lines
amazing when you look at the mileage! turkey being so far away from california.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 55 of 637: Marcia (MarciaH) * Wed, Aug 18, 1999 (18:41) * 1 lines
I guess this big blue marble is not all that big. I have heard Earthquakes described as striking a bell or a gong. It reverberates for a long while before all of the oscillations fade into the background.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 56 of 637: Wolf (wolf) * Wed, Aug 18, 1999 (20:51) * 1 lines
i'm sure it does, just like ripples in the water...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 57 of 637: Marcia (MarciaH) * Fri, Aug 20, 1999 (20:48) * 1 lines
Exactly analagous...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 58 of 637: Gi (patas) * Sun, Aug 22, 1999 (04:23) * 2 lines
Do you have anything on Lisbon's fault and seismic history, Marcia? Apart from the 1755 earthquake.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 59 of 637: Marcia (MarciaH) * Sun, Aug 22, 1999 (12:13) * 1 lines
I shall look it up - I am sure data is available, and with luck a plot of mapping of the faulting. Gives me something to do besides wring my hands over this hurricane about to assault Texas. Thank you for asking.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 60 of 637: Gi (patas) * Sun, Aug 22, 1999 (12:44) * 4 lines
You won't believe this but I give you my word it's true.
Earlier today there was a warning issued by the Maritime Authority that a giant ocean wave about 40 metres high was going to hit the Algarve (southern Portugal) coast. The beaches were evacuated, as were some restaurants and private homes. People gathered at high points to watch it appear.
I didn't hear of it until about an hour ago, found it peculiar (but exciting, I admit) and asked my DH to call the "Civilian Protection Service" to find out more.
Here's what we learned: the CPS had told the Maritime Authority to issue a warning that a heat wave of about 40ºcelsius would hit the Algarve this afternoon. Someone must have drunk a little to much at lunch and the warning came out as it did...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 61 of 637: Marcia (MarciaH) * Sun, Aug 22, 1999 (12:48) * 1 lines
Too scary but funny! That is like the 40' lava wave that was going to sweep over Hilo as reported in mainland US newspapers. That is impossible. Lava moves pretty rapidly down slopes fresh from the vest, but not at 40' high and not sweeping...more like creeping. We did get a lot of phone calls, though. That is highly irresponsible reporting!!! Thanks for sharing, and stay cool!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 62 of 637: Marcia (MarciaH) * Tue, Sep 7, 1999 (13:15) * 3 lines
The current information on the Greek Earthquake has not hit The Times of London yet, and am waiting for more information from Geological sources. Updates as soon as I can find them.
99/09/07 11:56:50 38.13N 23.55E 10.0 5.8Mb A GREECE
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 63 of 637: Marcia (MarciaH) * Tue, Sep 7, 1999 (16:10) * 27 lines
From the BBC:
Tuesday, September 7, 1999 Published at 19:29 GMT 20:29 UK
Earthquake rocks Athens
An earthquake has shaken the Greek capital Athens, killing at least 20 people and leaving more than 100
trapped inside collapsed buildings. Three children are said to be among those who died in the tremor, which
struck around 1500 local time (1200 GMT) and was followed by a series of strong aftershocks.
Thousands of Athenians who were taking an afternoon siesta, fled into streets when the tremor occurred.
People were hit by falling glass, concrete and marble slabs. At least three were killed when a building
collapsed in the northern working-class surburb of Menidi.
Emergency services are trying to free 70 people trapped under a collapsed detergent factory in the northern
Tatoi suburb, one of the worst hit areas. A further 20 people were reported trapped in the ruins of a flattened
apartment building.
Reports say up to 100 buildings have been destroyed in the tremor. A government spokesman said many
people were trapped inside buildings and several dozen had been transported to hospital.
Cracks appeared in buildings in the historic Plaka district, but there was no apparent damage to ancient
sites, including the Acropolis and the Temple of Zeus.
The Athens Seismological Institute said the quake registered 5.9 on the Richter scale, and its epicentre was
20km (12.4 miles) north of the capital. Experts said the seismic shift occurred 5 to 10km below the ground.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 64 of 637: Gi (patas) * Thu, Sep 9, 1999 (07:31) * 1 lines
Is there a site where I can find a sort of map of the earth's seismic faults, Marcia?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 65 of 637: Marcia (MarciaH) * Thu, Sep 9, 1999 (14:07) * 1 lines
Still looking for that map. There are several with local locations - like around San Francisco, or California in general. Will check for one for Lisbon for you (Portugal? Elsewhere?)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 66 of 637: Gi (patas) * Thu, Sep 9, 1999 (14:20) * 1 lines
Thanks! What I really want to know is the relationship between Lisbon's fault and others. If there is such a thing.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 67 of 637: Marcia (MarciaH) * Fri, Sep 10, 1999 (22:17) * 1 lines
I will keep checking for the world-wide system, but All of the European coastline on the Atlantic is along the plate boundaries of the European Plate and the Atlantic Plate. By their very nature they grind and slide past one another as the earth fluctuates with celestial tugging by moon and sun. That is what caused the great quake in Turkey, recently.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 68 of 637: Gi (patas) * Sun, Sep 12, 1999 (03:59) * 2 lines
...And in Greece? And two years ago in Italy? why one place and not another? Shall we be next?
Stupid questions, I know, but we are worried. I guess only the events in East Timor have taken our collective mind away from that worry.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 69 of 637: Marcia (MarciaH) * Sun, Sep 12, 1999 (14:13) * 2 lines
I could answer your question better if I knew if they had strain meters along your part of the plate boundary, and whether or not there was evidence of strain building up in the rock beneath. I trust it is being monitored and you will hear far before it becomes life-or-death time. The problem with that is the panic factor. The powers that be in places like New York City, have said that fewer people would die from the earthquake they did not know was coming than from the panic ensuing trying to leave the
city if they did know one was imminent. Terrible though it might seem, that may be the only viable option with the populations centered as they are. Alas, anything bordering the Mediterranean is a natural for earth upheavals. Your only sure bet would be to move to the less populated outskirts of the city, and away from the coast.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 70 of 637: Marcia (MarciaH) * Sun, Sep 12, 1999 (14:23) * 2 lines
Ah, and your question, why in one place and not in another: Some places the rock is more fragile and fractures more easily...in others it is just a case of
when one large piece of something past another, each with great inertia. It hops rather than slides along, resulting in a big quake at the point of the hop. Sometimes this is entirely arbitrary where it occurs, but others have had the way paved by smaller ones which tend to lubricate the slide and make that area more prone to quakes. It is an imprecise science at best.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 71 of 637: Marcia (MarciaH) * Sun, Sep 12, 1999 (16:35) * 2 lines
There has been an EarthQuake swarm on Kilauea today so I am hoping to get up there to look around and see what is happening: From Quake Map:
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 72 of 637: Wolf (wolf) * Sun, Sep 12, 1999 (18:32) * 1 lines
that's a first for me, what's an earth quake swarm?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 73 of 637: Marcia (MarciaH) * Sun, Sep 12, 1999 (20:03) * 2 lines
They occur when magma is moving down the rift zone (a network of cracks in the volcano's structure)under the surface. It usually precedes an eruption by a little while (hours to days), and the park service closes off access to the public for their protection. As soon as the eruption takes place and stabilizes itself in a specific area, they open it to the public for viewing. It is one of the most exciting things I can think of doing - anywhere, any time.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 74 of 637: Gi (patas) * Mon, Sep 13, 1999 (13:52) * 3 lines
Must be!
Thank you, Marcia, for looking for my "fault information".
There has been a new earthquake in Turkey this afternoon - have you heard?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 75 of 637: Marcia (MarciaH) * Mon, Sep 13, 1999 (14:04) * 1 lines
I had not. Thanks for the update. I just posted information about the ongoing activity at Kilauea volcano on Geo 2. Will post updates on both sites as the day progresses.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 76 of 637: Marcia (MarciaH) * Mon, Sep 20, 1999 (15:20) * 1 lines
A 7.6 EarthQuake has been reported in Taiwan. A tusnami Alert has been issued. More news as it becomes available.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 77 of 637: Marcia (MarciaH) * Mon, Sep 20, 1999 (18:00) * 10 lines
From http://quake.wr.usgs.gov/cgi-bin/finger?quake@gldfs.cr.usgs.gov
99/09/20 17:47:19 23.78N 121.09E 33.0 7.6Ms A TAIWAN
99/09/20 17:57:16 23.80N 121.34E 33.0 6.0Mb B TAIWAN
99/09/20 18:03:44 23.65N 121.36E 33.0 5.9Mb B TAIWAN
99/09/20 18:11:53 23.75N 121.19E 33.0 6.1Mb B TAIWAN
99/09/20 18:16:18 23.69N 121.31E 33.0 6.1Mb B TAIWAN
99/09/20 20:40:08 24.09N 121.95E 33.0 5.1Mb C TAIWAN
99/09/20 21:46:44 23.56N 121.10E 33.0 5.8Mb B TAIWAN
Looks like they have had a bad couple of hours...all of the earthquakes have been over 5.0 which is pretty lively.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 78 of 637: Marcia (MarciaH) * Mon, Sep 20, 1999 (18:32) * 42 lines
From the BBC ONline news:
A powerful earthquake has hit Taiwan, killing at least 20 people and causing
the partial collapse of a 12-storey hotel in the capital, Taipei.
Most northern parts of the island felt the effects of the quake, which has
been estimated at 7.6 on the Richter Scale.
But it struck in the early hours of the morning, so the full
extent of the damage and casualties is still unknown.
An official from the Ministry of the Interior told the AFP
news agency: "I'm afraid [there will be] more casualties
as many people are trapped in collapsed buildings."
Taiwan's weather centre says it is the strongest earthquake ever to have hit
the island.
In Taipei, rescuers are working at the 78-room
Sungshan Hotel, trying to pull survivors from the rubble.
At least two other buildings in the capital are reported to
have collapsed.
The US Geological Survey gave the preliminary
magnitude of the quake as 7.6 on the Richter scale.
Its epicentre is believed to be Nantou, an active earthquake zone in central Taiwan.
The earthquake which devastated Turkey last month,
killing more than 15,000 people, was measured at 7.4.
Warnings of tsunamis - tidal waves which often follow
earthquakes - have gone out for Taiwan, Japan and other
islands in the region, the Geological Survey said.
The quake, which struck at 1.47am on Tuesday (1747 GMT on Monday) caused
severe damage to infrastructure and buildings in several cities.
Power has been lost in large parts of northern and central Taiwan.
But the extent of the damage, especially in remote and mountainous areas, is
not yet known. Witnesses in Taipei spoke of continuing aftershocks,
buildings collapsing, objects falling off apartment blocks and people fleeing their homes.
Radio reports said the central city of Taichung might be the worst hit.
The city's mayor said: "This is one of the strongest earthquakes I have felt
in my life. Many buildings collapsed and there is damage to roads and
other infrastructure". The authorities have warned that, because of the
magnitude of the earthquake, aftershocks and tremors may be felt for the next two weeks.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 79 of 637: MarkG (MarkG) * Tue, Sep 21, 1999 (04:36) * 3 lines
The picture from the air of the collapsed hotel on the news was terrifying. I am hoping this was the only multi-storey building that collapsed, because if the hotel was just symptomatic, the Taiwan situation would look worse than Turkey. Amazingly, only 100 people were apparently in a 12-storey hotel overnight - seems strange?
In terms of comparisons with Turkey, if the numbers given so far as dead and injured are correct, I guess the buildings are constructed with quakes in mind.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 80 of 637: Marcia (MarciaH) * Tue, Sep 21, 1999 (15:30) * 2 lines
Mark, thanks for posting! Those who know about these thing - structural engineers - say the difference between Turkey and Taiwan damage is due almost entirely to buildings on Taiwan being built to stricter codes. That hotel bent and torqued as seen from the air is an amazing and terrifying sight. I can imagine how terrible, having ridden a 7.2 quake here which lasted more than 30 seconds. It was like walking on the heaving deck of a ship as the ground undulated beneath my feet. It is an incredible f
eling, and one I do not need to have repeated in my lifetime, thank you!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 81 of 637: Marcia (MarciaH) * Tue, Sep 21, 1999 (15:35) * 1 lines
According to the news, teams from Fairfax, Virginia complete with sniffer dogs and fiber-optics cameras are on their way to help search for victims. Teams are also in Taiwan from Japan and mainland China and other parts of the US. Karen, has Israel sent their top-notch team there, too? Have not heard as yet. Again, what a terrible job, and I am very thankful such competent people are willing to go and do it.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 82 of 637: Marcia (MarciaH) * Tue, Sep 21, 1999 (21:05) * 10 lines
Earthquakes and aftershocks continue for Taiwan, and another for Turkey plus one in Portugal just after Gi has gone on holiday, and one for my son in Calidfornia
99/09/20 21:46:43 23.49N 120.93E 33.0 6.5Ms B TAIWAN
99/09/20 21:54:32 38.61N 9.34W 10.0 3.7Lg A PORTUGAL
99/09/20 21:54:49 23.64N 120.94E 33.0 5.4Mb C TAIWAN
99/09/21 07:06:06 23.85N 121.63E 33.0 4.8Mb C TAIWAN
99/09/21 11:49:46 44.84N 149.74E 33.0 5.6Mb A KURIL ISLANDS
99/09/21 14:11:36 13.80N 90.68W 33.0 4.5Mb A NEAR COAST OF GUATEMALA
99/09/21 14:21:03 33.16N 141.42E 33.0 4.6Mb B OFF E COAST OF HONSHU, JAPAN
99/09/21 15:42:48 35.80N 121.26W 5.6 3.6Ml CENTRAL CALIFORNIA
99/09/21 17:38:39 23.90N 121.29E 33.0 5.1Mb A TAIWAN
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 83 of 637: Marcia (MarciaH) * Tue, Sep 21, 1999 (22:21) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 84 of 637: Marcia (MarciaH) * Tue, Sep 21, 1999 (22:24) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 85 of 637: MarkG (MarkG) * Wed, Sep 22, 1999 (02:55) * 4 lines
Wonderful plate boundaries map, Marcia!
Does your previous list of today's shocks show Richter measures (Ms, Mb, Lg) or are the A, B or C for seriousness)?
How come Hawaii gets shocks - is it not safe in the middle of the Pacific plate?
What happens to the faultline in the Mediterranean, and the one that heads into Northern Siberia and stops there, do you think?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 86 of 637: Marcia (MarciaH) * Wed, Sep 22, 1999 (12:04) * 12 lines
The right-hand column is magnitude of the earthquakes on the Richter Scale.
According to the source page of those statistics:
DEPDepth in kilometers
MAG Magnitude, with method used to calculate it:
Ml local, the original Richter magnitude
Lg mblg or Mn, local or regional magnitude for the area east of the Rocky Mountains
Md duration
Mb body wave
Ms surface wave
Mwmoment
Q Earthquake Location Quality: A is good, B is fair, C is poor, D is bad
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 87 of 637: Marcia (MarciaH) * Wed, Sep 22, 1999 (12:23) * 7 lines
Since they remove the plate boundary EQ map when they update it, I am posting another one which is static, but still shows all of the boundaries:
As to why Hawaii has Earthquakes in the middle of a plate...we are unique in the world for that fact and that we have volcanoes. It seems to be a "hot spot" (as the technicians call it) and as the plate moves across it to the northwest, new islands are formed. Another is forming off of our southeastern flank, but don't contact your real estate agents just yet. It will be several thousand years before it shows above the suface of the sea. The earthquakes we feel are just from the settling of the rock m
sses after magma has left a void, or new magma is forcing its way to the surface. Having said that, the strongest EQ that I have been through - 7.2 mag - was from the plate movement across the hot spot.
I truly think a lot of the dynamics of the Hawaiian situation is not yet known and GPS, laser measured inflation rates (the mountains actually swell when fresh magma enters the upper levels), and other new techinques may shed new light on the causes. We KNOW all about the effects!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 88 of 637: Marcia (MarciaH) * Wed, Sep 22, 1999 (12:24) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 89 of 637: Marcia (MarciaH) * Wed, Sep 22, 1999 (12:31) * 1 lines
Checking other sources about what happens to the Mediterranean plate boundary, it is there, but dives under other strata which have been forced onto it. I think it is the same for the Siberian boundary, as well. Close inspection of the map reveals the continuation of the boundary a few miles in front of the obstruction. (...at least, so it appears!)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 90 of 637: Marcia (MarciaH) * Wed, Sep 29, 1999 (13:20) * 1 lines
For a comparison of plate boundaries map above and global vulcanism, please check http://tvnight.org/yapp-bin/restricted/read/Geo/2.58
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 91 of 637: Gi (patas) * Thu, Sep 30, 1999 (04:53) * 1 lines
Marcia, wonderful maps. I'm saving this one as well as the vulcanism one.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 92 of 637: Marcia (MarciaH) * Thu, Sep 30, 1999 (12:36) * 1 lines
I think they compliment each other...It would be great to have a wall-sized on for reference, I think...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 93 of 637: Marcia (MarciaH) * Thu, Sep 30, 1999 (16:58) * 48 lines
TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED 30 SEP, 1659 UTC
THIS BULLETIN IS FOR ALL AREAS OF THE PACIFIC BASIN EXCEPT
CALIFORNIA, OREGON, WASHINGTON, BRITISH COLUMBIA, AND ALASKA.
. . . A TSUNAMI WARNING AND WATCH ARE IN EFFECT . . .
A TSUNAMI WARNING IS IN EFFECT FOR:
MEXICO, EL SALVADOR, ECUADOR
A TSUNAMI WATCH IS IN EFFECT FOR:
PANAMA, PERU
FOR OTHER AREAS IN THE PACIFIC, THIS MESSAGE IS FOR INFORMATION ONLY.
AN EARTHQUAKE, PRELIMINARY MAGNITUDE 7.6, OCCURRED 30 SEP, 1631 UTC.
COORDINATES: LATITUDE 16.0 NORTH, LONGITUDE 96.8 WEST
VICINITY: OAXACA, MEXICO.
EVALUATION: IT IS NOT KNOWN THAT A TSUNAMI WAS GENERATED.
THIS WARNING AND WATCH ARE BASED ONLY ON EARTHQUAKE
EVALUATION.
ESTIMATED TIMES OF INITIAL WAVE ARRIVAL AT LOCATIONS WITHIN THE
WARNING AND WATCH AREAS ARE:
ACAPULCO,MEXICO 1703Z 30 SEP
MANZANILLO,MEXICO 1801Z 30 SEP
ACAJUTLA,EL SALVADOR 1828Z 30 SEP
SOCORRO,MEXICO 1849Z 30 SEP
BALTRA IS,ECUADOR 1949Z 30 SEP
BALBOA HTS,PANAMA 2150Z 30 SEP
LA PUNTA,PERU 2233Z 30 SEP
BULLETINS WILL BE ISSUED HOURLY OR SOONER IF CONDITIONS WARRANT.
THE TSUNAMI WARNING WILL REMAIN IN EFFECT UNTIL FURTHER NOTICE.
RECIPIENTS OF THIS MESSAGE LOCATED IN CALIFORNIA, OREGON,
WASHINGTON, BRITISH COLUMBIA, AND ALASKA SHOULD REFER ONLY
TO ALASKA TSUNAMI WARNING CENTER MESSAGES FOR INFORMATION
ABOUT ANY TSUNAMI THREAT IN THOSE AREAS.
David N. Little
Geologist
IT Corporation
Martinez, California
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 94 of 637: Marcia (MarciaH) * Thu, Sep 30, 1999 (17:23) * 33 lines
TSUNAMI BULLETIN NUMBER 3
WEST COAST AND ALASKA TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED SEP 30 AT 1836 UTC
...THIS IS THE FINAL TSUNAMI ADVISORY BULLETIN FOR ALASKA,
BRITISH COLUMBIA, WASHINGTON, OREGON, AND CALIFORNIA ONLY...
NO, REPEAT NO, WATCH OR WARNING IS IN EFFECT.
AN EARTHQUAKE, PRELIMINARY MAGNITUDE 7.6, OCCURRED AT
0831 ADT ON SEP 30, OR 0931 PDT ON SEP 30, OR 1631 UTC ON SEP 30.
THE EARTHQUAKE WAS LOCATED IN THE GENERAL AREA OF:
SOUTHERN MEXICO NEAR 16.1N, 96.8W.
EVALUATION: NO DESTRUCTIVE TSUNAMI HAS OCCURRED.
NO TSUNAMI WAS RECORDED AT MANZANILLO, MEXICO.
NO TSUNAMI DANGER EXISTS FOR ALASKA, BRITISH COLUMBIA,
WASHINGTON, OREGON, OR CALIFORNIA. HOWEVER, SOME AREAS MAY
EXPERIENCE SMALL SEA LEVEL FLUCTUATIONS.
THE PACIFIC TSUNAMI WARNING CENTER IS CLOSING ITS INVESTIGATION
AND WILL ISSUE A FINAL BULLETIN.
THIS WILL BE THE LAST WEST COAST AND ALASKA TSUNAMI WARNING
CENTER ADVISORY BULLETIN ISSUED FOR THIS EVENT.
THIS INFORMATION IS ALSO POSTED AT HTTP://WWW.WCATWC.GOV.
David N. Little
Geologist
IT Corporation
Martinez, California
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 95 of 637: Marcia (MarciaH) * Thu, Sep 30, 1999 (18:39) * 3 lines
In Hilo, we do not take Tsunami warnings lightly. This is what Hilo looked like the day after the 1960 Tsunami. Information and more pictures from Hilo's very own Tsunami Museum: http://planet-hawaii.com/tsunami/
Suddenly I heard a shout, ‘Big wave!’ The streetlights around us exploded almost in the same instant. I looked up and saw a locally well known fishing boat coming up over the Wailoa Bridge" -- Susan Maeda Veriato on the 1960 tsunami in Hilo, as told to her son Travis [PTM Photo: Polhemus collection]
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 96 of 637: Gi (patas) * Fri, Oct 1, 1999 (03:09) * 1 lines
Wow! So this is what we would have had if our Giant Wave had been real... As it was, it didn't even fill the pool ;-)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 97 of 637: Marcia (MarciaH) * Fri, Oct 1, 1999 (12:55) * 2 lines
Indeed! What you cannot see is the human toll. People were washed out to sea, rescued and told terrifying stories to me. Others lost realtives. Our roofs were mostly sheet iron in those days, and the sheets slashed through the water slicing up houses, animals and people. Parking meters on sturdy metal posts were laid flat against the concrete in which they were set. That whole area in the picture has been made into parkland and soccer fields along the bay front and looks lovely. There is a memorial
set in the middle background to those whose lives were lost that April 1, 1960. Many more could have been saved had they not thought the warning sirens were an April Fool's Day joke!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 98 of 637: Marcia (MarciaH) * Fri, Oct 1, 1999 (13:01) * 1 lines
It is never just one huge wave. Like the pebble dropped into a pond creates a series of wavelets around its impact zone, so does an Earthquake. It was the third or fourth wave that did the most damage in Hilo. The surging water does more damage as it moves inland, only to suck back out to sea whatever is loose and movable. The next wave deposits it far inland from whence it came. They are terrible waves, indeed!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 99 of 637: Gi (patas) * Sat, Oct 2, 1999 (12:56) * 3 lines
Indeed they must be. It is like those aftershocks in Taiwan, almost as ugly as the first quake.
I had no idea there had been a quake in Portugal just after I left for Tunisia... Read it here and then had it confirmed...
After so much earth motion this year I admit I am a bit worried.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 100 of 637: Marcia (MarciaH) * Sat, Oct 2, 1999 (13:12) * 1 lines
It is difficult to live in a place with a history of Earthquakes and NOT be concerned... That one in Portugal was minor and north of Lisbon, if I recall correctly...Was there much damage reported? I have seen no follow-up information.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 101 of 637: Gi (patas) * Sun, Oct 3, 1999 (02:28) * 1 lines
I think not much. It was felt in Sintra and thereabouts. Since I am now in the south I don't really have access to people from that area, but will check when I go back to Lisbon.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 102 of 637: Marcia (MarciaH) * Sun, Oct 3, 1999 (18:56) * 1 lines
Thanks - it would be interesting to know what the cause might have been, or was it just settling and creaking of the mantle or crust...?!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 103 of 637: Marcia (MarciaH) * Sat, Oct 16, 1999 (12:40) * 27 lines
***** UPDATE OF PREVIOUSLY REPORTED EVENT *****
== PRELIMINARY EVENT REPORT ==
Southern California Seismic Network operated by USGS and Caltech
Version 8: This report supersedes any earlier reports about this event.
This solution has been reviewed by KNK
Magnitude : 7.0 ME
Time : 16 Oct 1999 02:46:44 AM PDT
: 16 Oct 1999 09:46:44 UTC
Location : 32 mi. N of Joshua Tree, CA
: 47 mi. ESE of Barstow, CA
: 14 mi. SE of HECTOR (quarry)
: 4 mi. NE of the Pisgah Fault
Coordinates : 34 deg. 35.73 min. N, 116 deg. 16.09 min. W
Depth : 3.7 miles ( 6.0 km)
Quality : Fair
Event ID : 9108645
More information is available on the Worldwide Web at:
http://www.trinet.org/scsn/scsn.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 104 of 637: Marcia (MarciaH) * Sat, Oct 16, 1999 (19:33) * 110 lines
Recommended reading this site has three maps and a brief description of the earthquake early this morning in Southern CAlifornia: http://wwwneic.cr.usgs.gov/neis/bulletin/991016094644.HTML
*************************
From http://quake.wr.usgs.gov/recenteqs/Quakes/quakes.big.html
Below is a list of earthquakes recorded by the California and Nevada
Seismic Networks during the last week. Times are local (PST or PDT).
Most recent earthquakes are at the top of the list...
Click on the word "map" or "MAP" to see a map view.
Click on a "DATE" to get additional text information.
Magnitude 3 and greater earthquakes are printed in bold type.
The top three magnitudes greater than or equal to 3 are in red.
MAG DATE LOCAL-TIME LAT LON DEPTH LOCATION
y/m/d h:m:s deg deg km
---------------------------------------------------------------------------------------
MAP 3.1 99/10/16 16:52:10 34.67N 116.34W 5.9 37 mi N of JOSHUA TREE
MAP 3.0 99/10/16 16:51:40 34.81N 116.33W 6.0 35 mi SSW of BAKER
MAP 3.0 99/10/16 15:55:38 34.67N 116.33W 0.0 37 mi N of JOSHUA TREE
MAP 4.6 99/10/16 15:53:41 34.71N 116.36W 6.0 39 mi N of JOSHUA TREE
MAP 3.1 99/10/16 15:25:28 34.44N 116.26W 2.0 21 mi N of JOSHUA TREE
MAP 3.5 99/10/16 14:55:44 34.70N 116.29W 5.8 39 mi N of JOSHUA TREE
MAP 3.1 99/10/16 14:53:57 34.41N 116.20W 2.7 20 mi NNE of JOSHUA TREE
MAP 3.0 99/10/16 14:46:15 34.85N 116.36W 2.7 34 mi SSW of BAKER
MAP 4.1 99/10/16 14:10:50 34.67N 116.34W 6.0 37 mi N of JOSHUA TREE
MAP 3.3 99/10/16 13:22:30 34.60N 116.32W 6.0 32 mi N of JOSHUA TREE
MAP 4.7 99/10/16 13:13:37 34.69N 116.28W 6.0 38 mi N of JOSHUA TREE
MAP 3.0 99/10/16 13:08:07 34.48N 116.27W 6.3 24 mi N of JOSHUA TREE
MAP 3.6 99/10/16 12:39:55 34.68N 116.31W 2.3 37 mi N of JOSHUA TREE
MAP 3.5 99/10/16 11:13:09 34.54N 116.28W 6.0 28 mi N of JOSHUA TREE
MAP 3.6 99/10/16 11:10:20 34.79N 116.34W 0.0 37 mi SSW of BAKER
MAP 3.8 99/10/16 11:05:22 34.57N 116.26W 0.0 30 mi N of JOSHUA TREE
MAP 4.3 99/10/16 11:01:52 34.65N 116.41W 9.2 36 mi N of JOSHUA TREE
MAP 3.1 99/10/16 10:55:16 34.53N 116.25W 0.9 28 mi N of JOSHUA TREE
MAP 3.5 99/10/16 10:48:31 33.27N 115.72W 0.7 6 mi S of BOMBAY BEACH
MAP 5.0 99/10/16 10:38:48 34.44N 116.24W 0.1 21 mi N of JOSHUA TREE
MAP 3.1 99/10/16 10:37:04 33.21N 115.65W 1.7 3 mi NNW of OBSIDIAN BUTTE
MAP 3.0 99/10/16 10:21:56 34.55N 116.27W 0.0 29 mi N of JOSHUA TREE
MAP 3.5 99/10/16 10:02:46 34.64N 116.37W 6.0 35 mi N of JOSHUA TREE
MAP 3.1 99/10/16 09:57:29 34.59N 116.26W 5.9 32 mi N of JOSHUA TREE
MAP 3.7 99/10/16 09:55:58 33.79N 116.11W 13.5 8 mi NE of INDIO
MAP 3.6 99/10/16 09:55:21 34.40N 116.29W 0.0 18 mi N of JOSHUA TREE
MAP 3.6 99/10/16 09:54:27 34.50N 116.36W 5.8 26 mi N of JOSHUA TREE
MAP 3.2 99/10/16 09:48:39 34.70N 116.30W 6.0 39 mi N of JOSHUA TREE
MAP 3.1 99/10/16 09:38:59 34.57N 116.26W 0.0 30 mi N of JOSHUA TREE
MAP 3.6 99/10/16 09:22:58 34.68N 116.30W 0.0 37 mi N of JOSHUA TREE
MAP 3.8 99/10/16 09:12:09 34.52N 116.27W 5.8 26 mi N of JOSHUA TREE
MAP 3.4 99/10/16 09:12:09 34.52N 116.26W 6.0 27 mi N of JOSHUA TREE
MAP 3.0 99/10/16 09:05:02 34.35N 116.24W 0.2 15 mi NNE of JOSHUA TREE
MAP 3.0 99/10/16 08:54:20 34.60N 116.31W 6.0 32 mi N of JOSHUA TREE
MAP 3.1 99/10/16 08:42:29 34.48N 116.27W 2.3 23 mi N of JOSHUA TREE
MAP 3.2 99/10/16 08:41:41 34.59N 116.28W 6.0 31 mi N of JOSHUA TREE
MAP 3.8 99/10/16 08:38:33 34.38N 116.14W 0.5 17 mi NNW of TWENTYNINE PALMS
MAP 3.6 99/10/16 08:31:47 34.55N 116.34W 6.0 29 mi N of JOSHUA TREE
MAP 3.0 99/10/16 08:18:55 34.40N 116.27W 0.4 18 mi N of JOSHUA TREE
MAP 3.8 99/10/16 07:52:35 34.45N 116.27W 0.6 22 mi N of JOSHUA TREE
MAP 3.0 99/10/16 07:48:45 34.47N 116.28W 2.5 23 mi N of JOSHUA TREE
MAP 3.7 99/10/16 07:44:25 34.56N 116.36W 6.0 29 mi N of JOSHUA TREE
MAP 3.8 99/10/16 07:43:44 34.45N 116.24W 0.0 22 mi N of JOSHUA TREE
MAP 3.8 99/10/16 07:43:11 34.44N 116.24W 5.8 21 mi N of JOSHUA TREE
MAP 3.5 99/10/16 07:20:45 34.70N 116.32W 6.0 39 mi N of JOSHUA TREE
MAP 3.7 99/10/16 07:07:05 34.37N 116.14W 0.0 17 mi NNW of TWENTYNINE PALMS
MAP 4.2 99/10/16 06:59:16 34.84N 116.34W 0.1 33 mi SSW of BAKER
MAP 3.6 99/10/16 06:56:43 34.68N 116.35W 6.1 38 mi N of JOSHUA TREE
MAP 3.5 99/10/16 06:55:23 33.23N 115.69W 0.2 6 mi NW of OBSIDIAN BUTTE
MAP 4.2 99/10/16 06:51:17 34.45N 116.23W 1.5 22 mi N of JOSHUA TREE
MAP 3.6 99/10/16 06:42:49 33.79N 116.12W 10.8 7 mi NE of INDIO
MAP 3.2 99/10/16 06:37:02 33.79N 116.12W 6.0 8 mi NE of INDIO
MAP 3.7 99/10/16 06:34:57 34.54N 116.31W 6.0 28 mi N of JOSHUA TREE
MAP 3.7 99/10/16 06:32:22 34.35N 116.22W 0.0 15 mi NNE of JOSHUA TREE
MAP 3.6 99/10/16 06:23:55 34.59N 116.30W 6.0 31 mi N of JOSHUA TREE
MAP 3.0 99/10/16 06:23:09 34.36N 116.14W 0.0 16 mi NNW of TWENTYNINE PALMS
MAP 4.0 99/10/16 06:22:10 34.55N 116.28W 0.0 29 mi N of JOSHUA TREE
MAP 3.0 99/10/16 06:14:56 34.45N 116.23W 0.6 22 mi N of JOSHUA TREE
MAP 3.1 99/10/16 06:09:09 34.42N 116.26W 4.0 20 mi N of JOSHUA TREE
MAP 3.9 99/10/16 06:05:20 34.69N 116.31W 6.0 38 mi N of JOSHUA TREE
MAP 3.9 99/10/16 06:01:08 34.77N 116.33W 6.0 37 mi SSW of BAKER
MAP 5.8 99/10/16 05:57:21 34.44N 116.25W 1.0 21 mi N of JOSHUA TREE
MAP 4.5 99/10/16 05:55:09 34.49N 116.26W 2.4 24 mi N of JOSHUA TREE
MAP 3.8 99/10/16 05:51:50 34.37N 116.13W 0.3 17 mi NNW of TWENTYNINE PALMS
MAP 3.9 99/10/16 05:37:22 34.43N 116.35W 6.0 21 mi N of JOSHUA TREE
MAP 3.8 99/10/16 05:15:09 34.61N 116.33W 6.0 33 mi N of JOSHUA TREE
MAP 4.4 99/10/16 05:03:19 34.72N 116.32W 6.0 40 mi N of JOSHUA TREE
MAP 3.6 99/10/16 04:52:24 34.68N 116.39W 16.0 38 mi N of JOSHUA TREE
MAP 4.1 99/10/16 04:49:59 34.72N 116.35W 6.0 40 mi N of JOSHUA TREE
MAP 4.0 99/10/16 04:47:44 34.69N 116.35W 6.0 38 mi N of JOSHUA TREE
MAP 3.8 99/10/16 04:38:49 34.53N 116.30W 6.0 27 mi N of JOSHUA TREE
MAP 4.4 99/10/16 04:27:39 34.68N 116.22W 12.0 38 mi N of JOSHUA TREE
MAP 3.9 99/10/16 04:21:40 34.40N 116.29W 6.1 18 mi N of JOSHUA TREE
MAP 4.0 99/10/16 04:04:33 34.37N 116.21W 6.0 17 mi NNE of JOSHUA TREE
MAP 4.0 99/10/16 03:49:50 33.23N 115.67W 0.1 5 mi NNW of OBSIDIAN BUTTE
MAP 4.6 99/10/16 03:20:52 34.38N 116.13W 6.0 17 mi NNW of TWENTYNINE PALMS
MAP 4.5 99/10/16 03:09:54 34.65N 116.29W 0.2 35 mi N of JOSHUA TREE
MAP 4.3 99/10/16 03:04:52 34.58N 116.18W 3.9 31 mi NNE of JOSHUA TREE
MAP 4.7 99/10/16 03:02:41 34.58N 116.37W 6.0 31 mi N of JOSHUA TREE
MAP 3.7 99/10/16 02:59:51 34.19N 117.26W 8.1 6 mi NNE of SAN BERNARDINO
MAP 5.3 99/10/16 02:51:52 34.41N 116.56W 6.2 22 mi NNW of YUCCA VALLEY
MAP 7.0 99/10/16 02:46:44 34.60N 116.27W 6.0 32 mi N of JOSHUA TREE
MAP 3.8 99/10/15 19:41:04 34.59N 116.27W 0.0 32 mi N of JOSHUA TREE
MAP 3.4 99/10/15 17:17:38 39.02N 123.07W 1.8 8 mi W of LAKEPORT
MAP 3.0 99/10/15 08:00:56 36.63N 121.23W 1.7 8 mi NW of PINNACLES
MAP 3.1 99/10/15 08:00:16 36.62N 121.23W 6.2 8 mi NW of PINNACLES
MAP 3.0 99/10/15 07:22:43 34.59N 116.27W 0.0 31 mi N of JOSHUA TREE
MAP 3.3 99/10/13 12:35:56 36.00N 120.56W 4.3 10 mi NW of PARKFIELD
MAP 3.0 99/10/12 21:56:10 33.21N 115.98W 9.1 5 mi SSW of SALTON CITY
MAP 3.0 99/10/10 09:44:04 38.53N 122.29W 5.3 9 mi ESE of ANGWIN
MAP 3.3 99/10/10 08:46:14 37.40N 117.08W 6.0 55 mi N of STOVEPIPE WELLS
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 105 of 637: Marcia (MarciaH) * Sat, Oct 16, 1999 (19:37) * 4 lines
The above statistics are easier to read on the web page...and the maps are hot linked for those who are really interested in it. They have had a bumpy ride today! Some of the aftershocks have been pretty strong, as well.
http://wwwneic.cr.usgs.gov/neis/bulletin/bulletin.html
Gives the statistics of earthquakes world wide for this date.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 106 of 637: Marcia (MarciaH) * Sun, Oct 24, 1999 (01:54) * 24 lines
The continuing strong earthquakes beneath Taiwan has spawned a group of interesting theories recently published in the journals of record for the science. Here is one such which explains the quakes as being the result of the zone of subduction (where the Pacific Plate it being dragged beneath the Asian Plate) activity.
AUTHOR: Lin, C. H.; Roecker, S. W.
TITLE: Deep earthquakes beneath central Taiwan; mantle shearing in an
arc-continent collision
AUTH AFFIL: Rensselaer Polytechnic Institute, Department of Earth and
Environmental Sciences; Troy, NY; United States
PUBLISHER: American Geophysical Union, Washington, DC, United States
SOURCE: Tectonics, v.12, n.3, p.745-755
REFERENCES: 10
YEAR: 1993
LANGUAGE: English
PUB TYPE: Serial, Analytic
FORMAT: illus., 2 tables, sketch maps
ISSN: 0278-7407
CODEN: TCTNDM
DESCRIPTOR: arrival time; Asia; body waves; central Taiwan; compression
tectonics; deep-focus earthquakes; displacements; earthquakes;
elastic waves; Eurasian Plate; Far East; faults; focal
mechanism; focus; island arcs; mantle; models; P-waves;
Philippine Sea Plate; S-waves; seismicity; seismology; shear;
Taiwan; tectonics; tomography
LATITUDES: N220000; N251000
LONGITUDES: E0122000; E0120000
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 107 of 637: JanaJH (Jana2) * Wed, Oct 27, 1999 (22:02) * 1 lines
Marcia, I finally had time to stop by and visit. Wow! Fascinating stuff, particularly for a California native like myself. I was sitting here writing up some of my earthquake experiences for you, and after a few loooong paragraphs my finger accidentally brushed the Escape key. Poof! It all disappeared. I took that as an omen that I was being long winded and boring and gave up :-). But I did want you to know that I enjoyed your site!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 108 of 637: Marcia (MarciaH) * Thu, Oct 28, 1999 (01:22) * 1 lines
Pleeeeeeeease try again on a page like wordPad and paste it here. I am delighted to see you *big smile* Check our updating weather maps in Geo 14.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 109 of 637: Marcia (MarciaH) * Thu, Oct 28, 1999 (22:15) * 1 lines
It was reported to me that Wales had a 3.5 earthquake...would the person who sent me the information please email me again...I cannot find your original letter. Thanks! Wales has a base of very old rock - Precambrian, which is odd for Cambria to have since it implied the rocks were there before the country was there - and that is probably correct.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 110 of 637: Maggie (sociolingo) * Fri, Oct 29, 1999 (12:33) * 1 lines
Hi Marcia, I sent in the Wales report, it was on the BBC news, I think that's the second or third this year.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 111 of 637: Marcia (MarciaH) * Fri, Oct 29, 1999 (12:54) * 1 lines
I thought you had, but going through your emails yeaterday I could not find it. And, I am most happy to credit my reporters. Thank you Maggie! I will check with the Beeb today since the Cal Tech equipment is not reporting it and none of the other world-wide reporting is, either. I shall go directly to BBC for Wales and get the scoop! Thanks, again!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 112 of 637: JanaJH (Jana2) * Sat, Nov 6, 1999 (02:56) * 2 lines
Hi Marcia,
I have to head over to Taipei for business next week. Do you know if they're still having lots of aftershocks there? Ever since the fright of 1994 I'm a nervous nellie about earthquakes so am not looking forward to it!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 113 of 637: Gi (patas) * Sat, Nov 6, 1999 (02:59) * 18 lines
I got this one from an online newssheet:
"At Police Headquarters of a developing country a telegramm arrives
from the Geophysics and Meteorology National Institute. It says:
URGENT STOP
Possible seismic activity in the capital in the next two days STOP
Very dangerous Richter 7 STOP
Epicenter 3 km from town center STOP
Take precautionary measures STOP
Urgently report back STOP
Three months later the Institute receives the following telegramm:
This is Police Headquarters STOP
Seismic activity completely under control STOP
Richter 7 tried to escape was shot dead STOP
Epicenter and three gang members arrested STOP
Could not answer earlier because an earthquake destroyed everything here STOP"
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 114 of 637: Marcia (MarciaH) * Sat, Nov 6, 1999 (15:29) * 3 lines
Jana, They have been having incredibly strong and frequent aftershocks on Taiwan. The most recent stron one was 6.1 a few days ago. Check this URL frequently and scroll to the bottom for previous quakes. Good Luck!!!
http://wwwneic.cr.usgs.gov/neis/bulletin/bulletin.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 115 of 637: Marcia (MarciaH) * Sat, Nov 6, 1999 (15:31) * 1 lines
Gi, *LOL* Thanks for the "update"...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 116 of 637: JanaJH (Jana2) * Mon, Nov 8, 1999 (02:13) * 1 lines
Thanks for the website, Marcia!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 117 of 637: Marcia (MarciaH) * Mon, Nov 8, 1999 (14:04) * 2 lines
You are most welcome. This is my "thing" and digging up information and sharing it is most interesting and rewarding to me. Thanks for your interest. Take notes and report back when you return from your Taiwan trip...and, Good Luck!
(Most EQ's happen in the dark of the moon or at full moon...!)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 118 of 637: Gi (patas) * Tue, Nov 9, 1999 (10:27) * 1 lines
Do they now? A tidal thing?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 119 of 637: Marcia (MarciaH) * Tue, Nov 9, 1999 (11:40) * 1 lines
David came up with a theory (about the same time others did) that having both the sun AND the moon on the same side of Earth caused abnormal gravitational tugging on the crust, thereby causing more frequent volcanic eruptions. It sure seems to work that way It turns out that Earthquakes happen at that same time more frequently. The thing which confounds me is that it also happens at full moon when those forces should cancel out each other. I think we do not know all there is to this...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 120 of 637: Marcia (MarciaH) * Tue, Nov 9, 1999 (15:11) * 12 lines
This news from Maggie:
A strong earthquake shook Northern Pakistan,
including the capital islamabad, last night. the
quake measured about 6 on the Richter sclae and was
centred aboout 220 miles north of the northwestern
city of Peshawar in the Hindu Kush mountains on the
Afghan border. There were no immediate reports of
casualties. (Reuters, Islamabad, in The Guardian
9.11.99)
I checked the near-real-time recorders at USGS and they reported it as 6.5. It is in a very remote ares (caused by the Himalayas being shoved up even higher) and any resulting damage or loss of life will be a long time filtering out. Many aftershocks noted, as well.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 121 of 637: Marcia (MarciaH) * Thu, Nov 11, 1999 (15:08) * 4 lines
There are still strong aftershocks from the EQ on the Afghan border
This just happened in Turkey...
99/11/11 14:41:24 40.80N 30.26E 10.0 5.6Ms A TURKEY
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 122 of 637: Marcia (MarciaH) * Thu, Nov 11, 1999 (15:10) * 1 lines
88 people reposted injured from the Western Turkey Earthquake
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 123 of 637: Marcia (MarciaH) * Fri, Nov 12, 1999 (23:06) * 101 lines
Turks rush to help quake survivors
By Amberin Zaman in Ankara
RESCUE workers were last night struggling to help survivors of an
earthquake measuring 7.2 on the Richter scale that shook western
Turkey yesterday, three months after the devastating tremor that left
17,000 people dead.
The quake centered on the town of Duzce, in a hilly
region of Bolu province, 115 miles east of Istanbul.
Main communication lines with Duzce were cut,
including the main highway linking Istanbul and
Ankara. Yahya Gur, the Governor of Ankara, said:
"A great number of buildings have collapsed in the
town. There are dead, and people are asking for help."
Bolu province was also hit by the quake in August, which measured
7.4 on the Richter scale, but suffered relatively little damage.
President Suleyman Demirel said: "We are face to face with a new
disaster." Turkey's Prime Minister, Bulent Ecevit, said: "The
aftershocks are still continuing. God protect us."
Hundreds of terrified residents poured into the streets as fires
erupted across the town. The local hospital was reported to be
overflowing with injured. They were being treated in the hospital
garden after the hospital was evacuated. Sadettin Cakmakoglu, a
doctor, said the hospital was in urgent need of pain killers and
medicine. He said: "I am calling out an SOS for Duzce."
Television pictures showed men and women weeping and crying out
the names of loved ones trapped under the rubble of collapsed
homes. People were shown tearing away at mounds of rubble as
they frantically tried to uncover buried relatives. One man kept
shouting "Allah, Allah, why, why?" as he pounded his chest in anger.
A television reporter in Duzce said: "There is utter helplessness
here at the moment. Hundreds of buildings have collapsed but there
is no one who can help." The pictures showed shocked residents,
wrapped in blankets, huddling together on the streets. Doctors were
quoted as saying that at least 1,000 people were injured in the
quake.
In the town of Bolu, women stood at the foot of a pile of rubble
weeping. A young man in tears was shown walking around his
collapsed home, shouting for his sister trapped in the rubble to talk
to him, while a woman was shown desperately pouring water on
flames around the rubble of her home.
Bolu province's police chief, Ugur Gur, appealed for help, saying
that Duzce was in desperate need of ambulances and doctors. He
said: "We can hear the moans of people trapped under the rubble,"
he said. "Please tell Ankara to send us doctors and ambulances . . .
please."
One television station broadcast appeals for blood donations. Mr
Ecevit said rescue teams had been rushed to the area and a crisis
management centre formed in Ankara to coordinate relief efforts.
Turkish military helicopters were ferrying the wounded to hospitals in
Ankara. The government's swift response contrasted sharply with its
sluggish reaction to the earthquake on Aug 17, which prompted an
outpouring of national anger.
Hundreds of thousands of victims left homeless in the earthquake
are still sheltering in tents despite government pledges to provide all
weather protection ahead of the harsh Anatolian winter, which is
beginning to set in. Yesterday's earthquake was felt in Ankara,
where terrified residents fled from their homes. It was also felt in
Istanbul and as far south as the Mediterranean resort of Antalya.
President Clinton is scheduled to arrive in Ankara on Monday on a
two-day state visit. He was expected to visit areas affected by the
previous quake.
17 October 1999: 1999: the year that seismic shifts killed 20,000
across the world
22 September 1999: World stunned by third disaster
29 August 1999: Istanbul fails to heed the fearful lesson of tremors
28 August 1999: Turkish quake homeless total rises to 600,000
19 August 1999: Refinery fire threatens earthquake survivors
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 124 of 637: Gi (patas) * Sat, Nov 13, 1999 (12:09) * 1 lines
This has been a terrible year for Turkey.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 125 of 637: Marcia (MarciaH) * Sat, Nov 13, 1999 (12:36) * 1 lines
It has been a bad geological epoch. Since Turkey straddles the Eurasian plate boundary Earthquakes have plagued the region as long as history has been written and rock upthrust and deformation could tell the story. It will continue to be one of the most unstable areas on earth.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 126 of 637: Marcia (MarciaH) * Mon, Nov 15, 1999 (19:24) * 10 lines
Since the above was written a 7.2 aftershock has occurred and taken many more lives in Turkey. For some idea of what they are experiencing and pictures as well check http://quake.wr.usgs.gov/study/turkey/#Nov12_1999_aftershock
ANATOLIAN FAULT MAP
MOLETRACK IN FIELD - WHERE THE EARTHQUAKE FAULT TORE ACROSS TURKEY
EARTHQUAKE CRACKS IN THE GROUND NEAR THE EPICENTER
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 127 of 637: Gi (patas) * Wed, Nov 17, 1999 (16:07) * 1 lines
That was very impressive!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 128 of 637: Marcia (MarciaH) * Wed, Nov 17, 1999 (17:16) * 6 lines
There is a part of the roadway in the Hawaii Volcanoes National Park which looks just like the bottom picture. One afternoon, some high school girls had crept under the barriers and were jumping up and down on a piece ready to fall into the crater - a 300 foot (52 M) drop!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 129 of 637: Gi (patas) * Thu, Nov 18, 1999 (03:32) * 1 lines
*shiver*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 130 of 637: Marcia (MarciaH) * Thu, Nov 18, 1999 (13:15) * 1 lines
Indeed! The park rangers went out very slowly and casually chatting with the girls and talked them safely back onto more stable ground. Crazy !
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 131 of 637: Marcia (MarciaH) * Wed, Dec 15, 1999 (18:31) * 27 lines
Quake Forces Cult Out of Tunnels
TACLOBAN, Philippines (Reuters) - A quake on Wednesday forced out
more than 2,000 followers of a Philippine cult hiding in tunnels for fear of the
sky raining down fire at the start of the new millennium.
The tremor struck at 1:12 p.m. (0512 GMT) and measured 4.8 on the
open-ended Richter scale, the Philippine Institute of Volcanology and
Seismology said.
The institute said it did not expect aftershocks or major damage. The quake
was centered near the coastal town of Ormoc, 570 km (355 miles) southeast
of Manila.
Officials said followers of cult leader Ceferino Qunito were hiding in dozens of
tunnels in the central province of Leyte.
A spokeswoman for the municipal office told reporters police had been
deployed around the tunnels, which were considered unsafe.
The tremor cracked walls and pavements in the town, she said.
Schoolchildren were also sent home early.
The earthquake-prone Philippines was hit by a quake measuring 6.8 on the
Richter scale on Sunday. Officials reported three deaths and 24 injured but
only minor damage.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 132 of 637: Marcia (MarciaH) * Mon, Dec 20, 1999 (19:40) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 133 of 637: Marcia (MarciaH) * Mon, Dec 20, 1999 (20:16) * 32 lines
Moderate Earthquake Shakes East Caribbean Islands
CHARLESTOWN, Nevis (Reuters) - A moderate earthquake with its center
about 12 miles east of Antigua jostled residents of the Leeward Islands early
on Monday morning.
On Nevis, people sleeping about 6:45 a.m. when the quake hit were rattled
awake and on Montserrat lamps sitting on dresser tops shook for about 10
seconds, one resident said.
``We haven't had any reports of damage. Strong shaking but nobody's said
anything was damaged,'' said Joan Latchman, a seismologist with the
Seismic Research Unit in Trinidad.
The tremor had a magnitude of between 4.8 and 5.7 on the open-ended
Richter scale, meaning it could have been strong enough to cause heavy
damage in populated areas.
Its epicenter was located at 17.09 degrees north and 61.59 degrees west at a
depth of 11 miles under the sea, according to the Trinidad unit.
It shook Antigua quite strongly and was also felt in Guadeloupe, Martinique,
Montserrat, and St. Kitts and Nevis.
Latchman called the quake moderate.
Different readings have been reported from various seismographic centers.
The 4.8 magnitude was registered in Guadeloupe but the U.S. Geological
Service recorded it as a 5.7. The Trinidad unit, which monitors all seismic
activity for the English-speaking Caribbean islands, listed it at 5.2.
There were no reports of injuries related to the tremor.
Latchman said that quakes of this magnitude occur more than once a year
but one so close to an island happens less often.
Others of similar size in recent years occurred north of Antigua last year and
one off Tobago in 1997. An earthquake of this size in a populated land mass
can be devastating, she said.
The earthquake was not related to nearby Montserrat where the Soufriere
Hills volcano is quiet, said Chelston Lee, spokesman for the Montserrat
Volcano Observatory.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 134 of 637: Marcia (MarciaH) * Thu, Dec 23, 1999 (15:25) * 55 lines
Algeria Quake Death Toll set at 22
AIN TEMOUCHANT, Algeria (Reuters) - Algeria said on Thursday that 22
people were killed when an earthquake flattened several buildings in the
western town of Ain Temouchant.
A government statement carried by state-run radio also said 47 people
remained in hospitals, including seven in critical condition. Scores had been
treated for minor injuries, it said.
Hundreds of people were left homeless when the quake struck on
Wednesday and they, along with others who feared aftershocks, spent the
night in the open.
Scores of women could be seen huddled in corners, covering themselves with
blankets as they waited for relief workers to set up tents in open areas.
Other residents carried mattresses and other household items which they
had salvaged from beneath the debris of mud bricks, all that remained of their
homes.
The government said it would distribute 600 housing units and had set up
tents to accommodate displaced people.
SCHOOLS DEMOLISHED
``I saw several collapsed buildings, including three schools which were
completely demolished,'' said schoolteacher Amina Kali. ``Scores of families
have been left homeless and spent the night outside in freezing
temperatures.''
An earlier official statement put the death toll at 28 with 181 injured in the
quake, which measured 5.8 on the Richter scale and shook several western
provinces of the North African country at 6:37 p.m. on Wednesday.
There was no immediate explanation for the revised figures.
``Fortunately, we don't have tall buildings. Otherwise the death toll would have
been much higher,'' a local official told Reuters.
``It was also relatively easy for rescue workers to reach trapped people
quickly. We don't have any missing people.''
State radio said the earthquake's epicenter was in Tissalat mountains where
Ain Temouchant is located.
But the impact of the quake was still evident in the rubble and on the faces of
many people wandering the streets of Ain Temouchant, a town with a
population of 56,000, some 45 miles west of the Mediterranean city of Oran.
Several expressed anger at what they saw as the government's slow
response to deal with the disaster.
``Many buildings are completely demolished. I've lost my two sisters here,''
Abdelhadi Mohammed, 30, said pointing to the rubble of what used to be his
home.
``But instead of rushing to our help, the authorities appear more concerned
about the prisoners who escaped from jail.''
CONVICTS FLEE AS PARTS OF JAIL COLLAPSE
Residents said many inmates fled after parts of the jail collapsed. At least
three prisoners died under the rubble, they added.
Energy officials have said the quake caused no damage to a major oil and
gas export terminal and refinery at Arzew, just a few miles east of Oran.
There had been no interruption at both facilities, the officials added.
Arzew, one of Algeria's two main export terminals, also has a refinery with a
processing capacity of 60,000 barrels a day.
Algeria's western region has been hit by several earthquakes in the past, the
deadliest of which was in 1980 when at least 2,590 people were killed in an
earthquake measuring 7.3 on the Richter scale.
The quake devastated the Algerian town of El Asnam, leaving 330,000 people
homeless. The town was subsequently rebuilt and renamed Chlef.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 135 of 637: Gi (patas) * Tue, Dec 28, 1999 (14:44) * 1 lines
Earthquakes are terrifying and people dying or being injured or losing property is not a laughable matter, but Marcia, some of those headlines had me LOLing! Sorry. Had to tell.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 136 of 637: Marcia (MarciaH) * Tue, Dec 28, 1999 (14:55) * 1 lines
The made me laugh, as well, and I do know how terrifying earthquakes can be. But some of these stories are amazing...Glad you enjoyed it as much as I did.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 137 of 637: lidya maccarthy (livamago) * Sat, Jan 15, 2000 (18:31) * 1 lines
My dear Marcia, I know you are enjoying your weekend, so I'll await your report on the quake in China...I heard on the news that fortunately there were not too many casualties.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 138 of 637: Marcia (MarciaH) * Sun, Jan 16, 2000 (12:02) * 10 lines
Just peeking in here for a second before hitting the road with the relatives. Had no idea there was an EQ in China...More when I get home...and some sleep!
Thanks for posting Lidya - you are a friend extraordinarie. Bless you! *hugs*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 139 of 637: lidya maccarthy (livamago) * Sun, Jan 16, 2000 (20:24) * 1 lines
Apparently there were two tremors; the aftershock being stronger than the eq. I don't in which area it occurred. Perhaps when you have time you can show us a map?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 140 of 637: lidya maccarthy (livamago) * Sun, Jan 16, 2000 (20:28) * 1 lines
What is wrong with my English tonight? Mayhap the weekend in the paternal home and the language of the cradle are corrupting my understanding of the lingua franca...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 141 of 637: Marcia (MarciaH) * Mon, Jan 17, 2000 (00:44) * 5 lines
The earthquakes in Yunnan Province:
00/01/14 22:09:04 25.58N 101.15E 33.0 5.2Mb B YUNNAN, CHINA
00/01/14 23:37:08 25.60N 101.14E 33.0 5.9Ms A YUNNAN, CHINA
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 142 of 637: lidya maccarthy (livamago) * Mon, Jan 17, 2000 (09:45) * 1 lines
Great work dear!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 143 of 637: Marcia (MarciaH) * Mon, Jan 17, 2000 (14:23) * 1 lines
Unfortunately I have not yet found an Earthquake map which updates automatically, but I have not given up on it most certainly. The hunt for just the right graphics for Geo is part of the fun!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 144 of 637: Marcia (MarciaH) * Tue, Feb 8, 2000 (17:52) * 1 lines
Yes, I did...it is posted on EARTHQUAKE!!! Geo topic 26.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 145 of 637: Marcia (MarciaH) * Thu, Apr 6, 2000 (15:45) * 3 lines
Ok, there is a smashing map of the fault lines in San Francisco Bay at this location http://www.sfbayquakes.org/
I would post it but at 178KB, it is far too big and slow. Enjoy! (courtesy of David's surfing for things needed at work.)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 146 of 637: Maggie (sociolingo) * Sun, Sep 24, 2000 (07:32) * 40 lines
Nothing much happened in here since April --I don't believe it!!!!
Earthquake hits Warwickshire, England
The biggest seismic event in Britain for 10 years ....
SEISMIC ALERT: WARWICK, WARWICKSHIRE 23 SEPTEMBER 2000 04:23 UTC 4.2 ML
http://www.gsrg.nmh.ac.uk/alert_info.htm
BGS have received many reports, from the Police, the media, the Emergency Planning Officer and residents in Cheadle (85 km to the north), Gloucester (65 km to the south), Peterborough (95 km to the east), Birmingham, Coventry, Warwick, Rugby, and Leamington Spa, of a felt event at 04:25 UTC this morning (23 September 2000). Felt reports describe "we were alarmed", "the bed moved", "the whole house shook", "we were woken from sleep" and "the whole building trembled". The BGS rapid-access networks detected an event at 04:23 UTC.
The following preliminary information is available for this earthquake:
DATE : 23 September 2000
ORIGIN TIME : 04:23 45.8sUTC
LAT/LONG : 52.28o North / 1.61o West
GRID REF : 426.5 kmE / 265.0 kmN
DEPTH : 13.1 km
MAGNITUDE : 4.2 ML
INTENSITY : 5+
LOCALITY : Warwick, Warwickshire
Historically, a similar earthquake occurred near Tewksbury, some 50 km to the south west with a magnitude of 4.1 in 1768. More recently, a magnitude 3.0 earthquake was felt at Stratford-upon-Avon in May 1994, 17 km to the south west. The largest earthquake within 100 km occurred at Bishops Castle near the Welsh border in April 1990, with a magnitude of 5.1 (almost 10 times the ground movement and 30 times the energy of the Warwick earthquake). It was felt over the whole of Wales, most of England and into Ireland and Scotland
Here's the list from the British Geological Society of EArthquakes in the UK this month
http://www.gsrg.nmh.ac.uk/recbrit.html
YearMoDy HrMnSecs Lat Lon kmE kmN Dep Mag Locality Int
20000923 042345.8 52.28 -1.61 426.5 265.0 13.1 4.2 WARWICK,WARWICKSHIRE 5+
20000921 073048.3 56.99 -5.47 189.0 794.2 6.4 1.2 LOCH NEVIS,HIGHLAND
20000915 035724.7 52.96 -4.36 241.3 342.6 23.3 0.7 LLEYN PENIN,GWYNEDD
20000914 214946.3 52.96 -4.36 241.3 342.7 22.6 0.7 LLEYN PENINSULA
20000912 014225.6 50.11 -5.18 172.6 28.0 7.2 -0.2 CONSTANTINE,CORNWALL
20000912 001419.5 54.63 -2.43 372.3 525.7 4.8 0.8 APPLEBY,CUMBRIA
20000911 032127.2 54.81 -3.59 297.9 547.6 3.6 1.0 SOLWAY FIRTH
20000910 065255.2 52.97 -4.41 238.3 343.8 22.0 0.4 LLEYN PENINSULA
20000906 002612.3 57.58 -5.49 191.7 860.3 5.2 0.6 TORRIDON,HIGHLAND
20000830 235340.7 56.20 -2.96 340.2 700.8 3.7 1.4 EXPL-LARGO BAY,FIFE 2+
20000824 074921.1 55.39 -5.23 195.2 615.0 19.0 2.1 ARRAN,STRATHCLYDE
20000823 071515.2 53.06 -4.55 229.0 354.5 13.2 0.6 CAERNARVON BAY,GWYNEDD
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 147 of 637: Maggie (sociolingo) * Sun, Sep 24, 2000 (07:39) * 6 lines
What to do if you feel an earthquake in the UK
Go to the British Geological Society site and fill in this form ....
http://www.gsrg.nmh.ac.uk/hazard/quest.htm
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 148 of 637: Marcia (MarciaH) * Sun, Sep 24, 2000 (22:08) * 1 lines
Maggie, general earthquake lists are posted in Geo 26. This is the place for discussion of other bigger results. I post them regularly in 26 but thanks for posting here!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 149 of 637: Maggie (sociolingo) * Mon, Sep 25, 2000 (03:10) * 1 lines
Oops!! sorry, missed that! (I get muddled without enough coffee in me!) Hey, 4.2 is MASSIVE for the UK!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 150 of 637: Marcia (MarciaH) * Thu, Sep 28, 2000 (01:14) * 1 lines
You are very old rock...your plate boundary is pretty far from the 'dry land' and 4.2 for those not used to having the earth move under their feet under usual circumstances, it must have been frightening!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 151 of 637: Marcia (MarciaH) * Fri, Dec 8, 2000 (12:10) * 29 lines
The 20th Century had it's share of damaging earth all around the globe
and the Pacific Ring of Fire was no exception Below is an incomplete
list of the DEADLIEST earthquakes experienced.
Location Country Year Deaths
Tangshan China 1976 650,000
Kansu China 1920 200,000
Tokyo Japan 1923 140,000
Kansu China 1932 70,000
* Peru 1970 67,000
* = Location unknown
The next list is of the most POWERFUL earthquakes
to occur during the 20th Century
Location Country Year Magnitude
Puerto Montt Chile 1960 9.5
P.W Sound USA 1964 9.2
* Chile 1906 8.6
Kansu China 1920 8.5
San Fr. USA 1906 8.3
The size of the 1960 and 1964 events are disputed but these figure I
hear most frequently.
Thanks, Rob
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 152 of 637: (sprin5) * Sat, Dec 9, 2000 (12:16) * 1 lines
The 76 quake in China was devastating, almost a million people! It must have hit in a very heavily populated area. And Kansu China as two megaquakes within 12 years of each other.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 153 of 637: Marcia (MarciaH) * Wed, Dec 27, 2000 (14:34) * 12 lines
On January 23 1855 an earthquake measuring 8.2 on the Richter scale ruptured the Wairarapa Fault
east of Wellington causing massive uplift west of the fault across 20,000km2 of the lower North
Island. Only 5 people were killed simply because the 500,000 people living in and around Wellington
now were not there then. The earthquake raised the land that Wellington sits on now and also the
land that the airport is sited on between Cook Strait and the harbour. With more than 3 active faults
in or near Wellington it is a deadly guessing game figuring out which one will rupture next, though the
most likely candidate is the Wellington Fault running a mere 700 metres from Parliament. This fault
has classic sag ponds on it in the hills near Karori and those ponds are now reservoirs for the
Wellington water supply system. Another dangerous faultline is the Ohariu Fault. Although this fault
moves less frequently than the other two it is expected to produce an earthquake up to 7.5 on the
Richter Scale. It crosses Porirua harbour giving it the disjointed look near the highway bridge and the
North-South railway.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 154 of 637: Marcia (MarciaH) * Wed, Dec 27, 2000 (15:16) * 1 lines
China never wanted outside help so they just let the people die. All of the mass devastation is just now being discovered. Truly tragic!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 155 of 637: Marcia (MarciaH) * Wed, Dec 27, 2000 (17:06) * 69 lines
The explanation on the varying magnitudes given for the greatest
earthquakes is a matter of advancement in the science of calculating quake
magnitudes.
The reason we hear conflicting magnitudes is often because a
seismologist is speaking through the press to the public in the terms they
understand, as they are accustomed to Richter Magnitude, and most are unaware
of the other scales that are now in use. You will often hear the press
ask, "What was the Richter magnitude?" The seismologists simply ignore
the "Richter", will not take the time to explain the various scales
being used, and simply answer with the appropriate magnitude, no matter
which scale was used to measure it.
I understand their reason for doing this, but frequently find this
factor irritating, as for example, when a seismologist had the chairman of
our EPC confused and extremely hyper, as he was about to compare the
1857 Fort Tejon quake, not above Mw 8.0 (formerly given as ML 8.25), to
the 1964 P. W. Sound megaquake of Mw 9.2, that he had seen a video of
the destruction of! We are in no less danger where we live on the San
Andreas Fault Zone, but that is due to a difference in our environment.
For earthquakes up to, let's say, M 5.5, this isn't a problem, because
the magnitudes given for quakes will not differ significantly,
whichever scale is used. The different scales are each most useful within a
given magnitude range. It becomes more significant above M 6.0, and
greatly significant for great earthquakes.
The EQ magnitude scale that was first introduced was the Richter scale
in 1935. It is based on the logarithm of the peak amplitude recorded on
a short period seismometer, corrected for distance. This scale, now
called Local Magnitude (ML) was developed using local recordings of
earthquakes in Southern California.
In order to study earthquakes on a global scale,
with recordings at great distances from the focus, it was necessary to
develop other magnitude scales.
These scales were calibrated to give numbers similar to the Local
Magnitude, but since the
waves being measured differ, the magnitudes may vary slightly.
There are others, but these four are the most
important to remember, as you will see them
being use most frequently:
(ML) Richter (Local) Magnitude - Essentially,
Dr. Richter's scale, still quite useful for smaller local quakes, but
not useful for quakes
classed as "Great".
(Ms) Surface Wave Magnitude - Formulated by Dr. Guttenberg to describe
distant quakes with
surface waves with a 20-second period.
(Mb) Body Wave Magnitude - Formulated by Dr. Guttenberg, for waves that
pass through the interior of the planet, and that have a shorter
period.
(Mw) Moment Magnitude - Formulated by K. Aki and Hiroo Kanamori, among
others. It is the best representation of the largest earthquakes on the
planet, as it takes much more into consideration. It is based on more
than just the logarithm of the peak amplitude, corrected for distance.
It combines a measurement of total energy release with the amplitude of
the waves; and takes into account the surface area of the fault, the
average displacement of the fault plane, and the rigidity of the material
of the fault. This is the Seismic Moment, Mo, from which the Moment
Magnitude is calculated.
[You may also often see (Md) - duration magnitude, used on smaller
events.]
(thanks Yahoo Clubs and Sandi)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 156 of 637: Marcia (MarciaH) * Wed, Dec 27, 2000 (17:10) * 40 lines
More from Sandi:
I don't remember the source of this online quote:
"A more systematic problem occurs for large earthquakes. The signals
for earthquakes of different sizes are not simply scaled by some
multiplicative factor. The shape of their frequency spectra changes because
larger earthquakes have larger source dimensions and therefore longer
source durations. If these durations are larger than the period at which
the magnitude determination is made, then the number will be
systematically too low. In the last decades, it has become common practice to
analyze earthquakes by modeling the waveforms over a broad frequency range.
This gives a more accurate number for the size of the earthquake
(seismic moment) and the mechanism."
If the moment tensor solution is not yet available, the magnitude for a
significant quake, as reported by the USGS/NEIS is either a surface
wave magnitude or a body wave magnitude.
The reason the different scales are each most useful within a given
magnitude range, is because they become saturated at a certain magnitude,
and fail to measure any magnitude above the magnitude they become
saturated at. The 1960 Chile and the 1964 Alaska quakes were so enormous
that they saturated the traditional magnitude scale. With the introduction
of the Moment Magnitude Scale, they were revised upward to Mw 9.5 and
Mw 9.2, respectively. These are the appropriate magnitude for these
events.
The 1906 San Francisco quake was also revised downward, from the
traditional M 8.25 - M 8.3 to Mw 7.7. I have formerly seen an Ms 7.9 for this
event, but the Moment Magnitude is the best measurement.
I don't have information on the Moment Magnitude of these other two
quakes you mentioned;
Chile 1906 8.6
Kansu China 1920 8.5
This a good site that discusses the magnitude of the 1906 San Francisco
earthquake.
http://www-socal.wr.usgs.gov/wald/1906/1906.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 157 of 637: Marcia (MarciaH) * Thu, Dec 28, 2000 (15:48) * 24 lines
Thank you, Rob
The Alpine Fault is the largest faultline in New Zealand, running a
distance of 550km from the entrance to Milford Sound in the south to the
Pacific coast north east of Blenheim. Geological records and samples of
fallen vegetation suggest that the last earthquake to occur on it was
in 1720 and prior to that it had moved at least 3 times. Each earthquake
had a magnitude of roughly 8 and a gap of 140-260 years existed between
individual events. Because of its location this fault is a particularly
severe threat to Wellington and Christchurch both of which are less
than 150km away. The time is now due for a damaging event to occur on this
fault which has several branches running north of Kaikoura. The Hope
Fault runs through the Hope river valley near Hanmer which is famous for
it's hotpools supplied by hot springs on the fault. It moved in 1888
and damaged the Cathedral in Christchurch with a magnitude 7.0-7.3 event
(no one has given a definite figure). Further north a fault runs
through the Clarence valley, and although it has not moved in recent times it
is judged as active. Through the Awatere valley you have a fault
crossing farmland and entering the sea just north of the Awatere river mouth.
It is also active.
The northern-most fault is the most dangerous. It is the Alpine Fault
and it runs within 7km of Blenheim (Population 25,000)and dominates the
geology of the Wairau River valley, along whose length it runs almost
the entire distance.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 158 of 637: Cheryl (CherylB) * Tue, Jan 9, 2001 (18:01) * 1 lines
Is New Zealand a fairly recent land mass? What I mean is relation to the age of the continents, such as Iceland is a recent land mass in relation to the ages of the continents. (I hope I got that out right?)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 159 of 637: Marcia (MarciaH) * Wed, Jan 10, 2001 (23:15) * 3 lines
It is more about plate tectonics. New Zealand is astride the Pacific Ring of Fire. The plate is subducting there - It goes BOOM!!!
Iceland is astride the Mid-Atl;antic Ridge where it is expanding, the lavas as very fluid like Hawaii's are, and it just flows with a few fountains. Iceland is much newer since it is new lava.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 160 of 637: Cheryl (CherylB) * Thu, Jan 11, 2001 (17:09) * 1 lines
Thanks Marcia.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 161 of 637: Marcia (MarciaH) * Sat, Jan 27, 2001 (21:49) * 88 lines
India Fears 15,000 Quake Dead, Fresh Tremors Felt
BHUJ (Reuters) - Thousands of shocked survivors slept in the open
rather than risk entering shelters on Sunday as western India
experienced fresh tremors after an earthquake in which 15,000 were
feared killed.
Officials appealed for calm, as families pushed injured relatives in
handcarts, urgently seeking medical help, between heaps of rubble up
to 25 feet high.
Some survivors lost patience during long waits for fuel, and rescuers
admitted two days after the quake that they were now mostly searching
for bodies.
The quake on Friday, India's Republic Day holiday, measured 7.9 on
the Richter scale and cut a swathe of destruction across the prosperous
agricultural and industrial state of Gujarat, from its commercial capital
Ahmedabad to the coastal marshes of Kutch, near the epicenter.
Officials were unable to give an accurate death toll from the quake, the
most powerful to hit India in half a century, as many people were still
buried under rubble.
Narendra Modi, General Secretary of the ruling Bharatiya Janata Party
(BJP), said he believed 15,000 might have died, including 13,000 in
Kutch.
"I have come to the conclusion that we will cross 13,000 in Kutch alone
and elsewhere maybe 2,000 more," Modi told Reuters in Ahmedabad
on his return from a helicopter tour of the region.
Star TV quoted federal Defense Minister George Fernandes as telling
reporters he also feared 15,000 had died.
If confirmed, the death toll would approach that of a severe
earthquake in Turkey in August 1999, when more than 17,000 people
perished.
Bhuj, only about 12 miles from the epicenter, counted many of the
dead among its 150,000 people. Nearby Anjar, home to 30,000, was
flattened.
Police said some 350 schoolchildren and 50 teachers were feared dead
when they were buried in rubble during a school parade celebrating the
anniversary of India becoming a republic in 1950. Another 50 were
pulled from rubble alive.
"In Anjar, you can't find a single house intact," Modi said.
Much of Bhuj was also reduced to rubble.
SHORTAGE OF WATER, FOOD AND FUEL
There was already a severe shortage of food, water and fuel despite
the air force planes which flew in relief supplies, and then ferried
bandaged and dazed survivors to safety. Electricity came from only a
few emergency generators.
Tempers frayed as survivors desperate to escape Bhuj queued for fuel
for cars, scooters and motorized rickshaws.
An estimated 200 aftershocks had added to the unease.
Residents in Ahmedabad ran scared as fresh tremors shook the city of
five million people early on Sunday.
Most residents had spent the night on the roads, but the tremors
raised the possibility of fresh devastation for those who had returned
to their homes not damaged in the killer quake.
"We were reminded of the day before yesterday and were worried that
the house will come down. We all ran out," said Mitu Phulwani, a
housewife.
There were no immediate reports of new damage.
DEATHLY SILENCE IN BHUJ
There was a deathly silence among the ruins of the older parts of Bhuj
town. Rescue operations, hampered by the lack of electricity, wound
down as night fell on Saturday.
Along the cracked roads leading to Bhuj, collapsed houses, buildings
and temples dotted the landscape.
Gujarat State Minister for Transport and IT Bimal Shah said he
estimated more than 500 were dead in Ahmedabad. Among them were
nearly 30 students trapped in a high school stairwell.
Special trains from India's main cities ferried anxious relatives to
Gujarat. Many waiting at railway stations to board trains had had no
news of their families since the quake.
The Indian army and air force swung into a huge rescue effort, flying in
satellite telecommunications equipment to restore Gujarat's links with
the rest of the country.
Thousands of troops, engineers and doctors joined the relief effort.
The Air Force said it had 40 cargo planes and military aircraft ferrying
engineering equipment, mobile kitchens, food, water, tents, blankets
and power generators.
Officials were also concerned about disease if bodies began
decomposing under the rubble.
"Steps are being taken against the outbreak of epidemic... Public
health teams are on standby and some have been sent to Bhuj and
Ahmedabad," Bhaskar Barua, a senior government official, said.
HELP FROM ABROAD
Many countries offered help.
Neighboring Pakistan, putting aside its differences with nuclear rival
India, said it would provide relief. The quake killed at lest 15 people in
Pakistan.
Rescue teams, sniffer dogs and relief funds from Britain, Germany,
Canada, Italy, the United Nations and Turkey were set to arrive in
India on the weekend.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 162 of 637: Marcia (MarciaH) * Sun, Jan 28, 2001 (14:39) * 42 lines
Experts Say Recent Worldwide Quakes Not Related
DENVER (Reuters) - Is the earth coming apart at its geological seams?
With thousands feared dead after a powerful earthquake struck India
on Friday, another that earlier devastated El Salvador, a tremor off
Kyushu Island, Japan, and even a minor quake in Ohio late on
Thursday people start wondering.
Relax. "These earthquakes are not related," said Waverly Person,
director of the Earthquake Information Center in Golden, Colorado,
which tracks earthquakes worldwide.
"We locate about 50 quakes every day. But you only hear about them
if people are killed or if they're felt very strongly in the United States,"
Person said, rushing from one media interview to another.
The center was established in Washington in 1966 and has been
working out of Golden since 1973. It tracks earthquakes worldwide and
often provides the first news of a tremor.
Phone banks started lighting up at the center, operated by the U.S.
Geological Service, before dawn on Friday with news that the worst
earthquake in 50 years had hit India.
The tremor may have killed more than 1,500 people, but officials in
India said the final toll may be much higher.
The quake was measured at 7.9 on the Richter scale by the
earthquake center.
The most murderous recorded quake in history killed an estimated
830,000 people in Shaanxi, central China, on February 2, 1556.
Events ranking about 4.5 or greater -- of which there may be several
thousand every year -- are strong enough to be recorded by sensitive
instruments all over the world.
Person said there is no reason to believe the quake that rocked El
Salvador on Jan. 13 also triggered events that led to Friday's
earthquake in the Indian sub-continent.
The quakes occurred on separate tectonic plates and a quake on one
does not set up a domino effect in another.
According to records, about 18 major quakes -- measuring between 7.0
and 7.9 on the Richter scale and one great quake, measuring 8.0 and
above -- can be expected each year. Many of these, however, may
strike uninhabited parts of the world.
But does it make life scarier for people living in quake zones?
"What it does is bring forth awareness in places like California and
Alaska. It brings it up in their mind," Person said.
"But they're not more afraid," he added.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 163 of 637: Marcia (MarciaH) * Thu, Feb 8, 2001 (18:33) * 34 lines
http://clubs.yahoo.com/clubs/worldseismicity
In the periods before during and after an earthquake there is a number
of different phenomena that can occur depending on soil type,
earthquake strength intensity, and location.
Seiches are suddenly movements involving water bodies that can last
only a few hours or as long as of and on for a few days. Generally when
one begins the water will begin to suddenly retreat at speed, more like a
really fast moving tide. Soon the retreat will stop and with similar
speed the water will return. Seiches in New Zealand have occurred after
several large earthquakes and earthquake swarms in the volcanic zone of
the North Island. Some have taken people by surprise and there have
desperate scrambles to safety on beaches along the shorelines of Blue and
Green Lakes in the volcanic zone.
Liquefaction of sandy soils has occurred in some cities overseas
following major earthquakes and
is possible in Christchurch, where large parts of the eastern and
northern surburbs sit on sandy soils formed either by marine transgressions
or fluvial material being moved from the mountains. In 1964 an
earthquake badly damaged the Japanese city of Niigata where liquefaction sank
many buildings into the ground after muddy groundwater came to the
surface. It blocked and damaged bridge approaches and covered roads in mud.
SEE ALSO Sand boils.
Sand boils occur when motion underground transports sandy material to
the surface and deposits it on and around cracks opened during the
preceeding seismic event. In New Zealand they occurred in the 1987 Bay of
Plenty earthquake and in the big 1855 earthquake on the Wairarapa Fault.
Continued next post
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 164 of 637: Marcia (MarciaH) * Thu, Feb 8, 2001 (18:34) * 14 lines
Continued
Tsunami as most here know is a Japanese word for the seismic sea waves
that sometimes accompany earthquakes. Tsunami waves can and do vary
from as little as 3-4 centimetres in height to 100 metres in the more
severe cases. The 1998 Papua New Guinea tsunami killed 3000 people and was
10 metres high. It was generated by a magnitude 7+ earthquake offshore.
An earthquake in Chile (the most powerful on record)in 1960 generated a
tsunami that hit Lyttelton 15 hours later, Hilo about the same time and
Japan about 5 hours later. It badly damaged the Hilo waterfront and
disrupted shipping movements in Lyttelton for 8 hours. Several were killed
in Hilo and nearly 100 in Japan.
Thanks, Rob!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 165 of 637: Marcia (MarciaH) * Thu, Feb 8, 2001 (19:23) * 1 lines
Rob, a 1946 Tsunami hit Laupahoehoe just up the coast north of Hilo. It took out a grade school and all the students and teachers. Some few survived, but many were lost. This Quake had come from the Aleutians. We get it from either end, it seems. Hilo is long overdue for another great quake and/or tsunami.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 166 of 637: Cheryl (CherylB) * Tue, Feb 13, 2001 (18:01) * 1 lines
That is an upsetting thought, Marcia.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 167 of 637: Marcia (MarciaH) * Wed, Feb 14, 2001 (23:02) * 1 lines
Ah yes, but we have had a quake-generated tsuanmi from each direction, and the places cleansed of human occupation are now open fields for bayfront beautification, soccer fields and canoe-racing sheds for outrigger canoes. Out of tragedy - even as great as a tsunami, comes some good. I think our 7.2 quake was sufficient for another generation. I feel quite secure here!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 168 of 637: Cheryl (CherylB) * Sat, Feb 17, 2001 (13:57) * 1 lines
Glad to hear that you should be safe for another generation.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 169 of 637: Marcia (MarciaH) * Sun, Feb 18, 2001 (00:07) * 54 lines
yup... God willing and the lava don't rise...
El Salvador Earthquake Turns Deadly
SAN SALVADOR, El Salvador (AP) - A sharp earthquake rattled El
Salvador's capital Saturday, killing at least one person and fraying
nerves in a nation already stricken by two deadly quakes and
thousands of aftershocks this year.
Crowds of people, some weeping, ran into the streets after the quake
hit with a sudden thud at about 2:25 p.m. local time, sending ominous
clouds of dust rising from the crater of the San Salvador Volcano
overlooking the city.
The government reported one death and three injuries and said the
quake set off scattered landslides. Two people were pulled alive from
the ruins of a house in Apopa, north of San Salvador.
The quake had a magnitude of 5.3 and was centered just south of the
capital, the National Emergency Committee said. It created further
anxiety for San Salvador, where two earlier quakes killed more than
1,200 people.
``If we are going to die, let us die now,'' said taxi driver Daniel Santos,
fed up by the shuddering earth. ``This is torture.''
A 7.6-magnitude earthquake on Jan. 13 killed at least 844 people and
damaged or destroyed 278,000 dwellings. Exactly one month later, a
6.6-magnitude quake killed at least 402, injured 3,153 and destroyed
45,000 homes.
There have been thousands of aftershocks in recent weeks, several of
them with a magnitude of 5 or greater.
``I'm panicked. I feel like we've been afflicted,'' said Esmeralda
Mendoza, 26. She stood almost frozen outside a pharmacy, still
trembling almost an hour after Saturday's quake. ``This is going to
finish off El Salvador.''
With the national government bombarded with complaints of
sluggishness and overwhelmed by red tape, local mayors have been
taking charge - an unusual step in a highly centralized country.
Local officials in Santa Tecla, where hundreds died in a landslide set off
by the January quake, began negotiating with foreign donors and
distributing aid before national leaders were organized.
After a brief squabble, the national government announced aid would
be channeled through mayors - though it complicated the task by
promising aid that had not yet arrived in local hands.
Several mayors were attacked by mobs of desperate disaster victims
who believed they were holding back help.
Mayors who in the past hardly made a move without consulting national
officials now are negotiating directly with foreign governments and aid
groups.
``We're seeing organizations pick a town to rebuild rather than just
sending aid to the country,'' said Cesar Martinez, spokesman for the
Foreign Ministry.
President Francisco Flores heads to Europe in the coming days to plead
a second time for emergency funds. The government says it needs $3
billion dollars to get the country back on its feet.
The main opposition party, the former guerrillas of the Farabundo Marti
National Liberation Front, started its own plan for reconstruction and
has clashed with the government about how aid should be handled.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 170 of 637: Marcia (MarciaH) * Sat, Feb 24, 2001 (19:57) * 16 lines
Three Killed As Quake Rocks China's Sichuan
Reuters
Feb 24 2001 8:02PM
BEIJING (Reuters) - Three people were killed and many injured by an
earthquake that struck a remote part of China's Sichuan province,
state media reported on Saturday.
The quake measuring 6.0 on the open-ended Richter scale struck a
mountainous area populated by ethnic Tibetans in the southwestern
province on Friday.
Xinhua news agency reported a large number of houses were damaged
or destroyed by the earthquake, which seriously damaged roads and
services, including water supplies, power and telecommunications.
The official news agency gave no exact figure for injuries.
Earlier, Xinhua reported the quake rocked Yajiang and Kangding
counties at 8:09 a.m. and was felt in 20 towns by around 20,000
people.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 171 of 637: Marcia (MarciaH) * Sun, Apr 15, 2001 (17:36) * 57 lines
EARTHQUAKE MAGNITUDES
MAGNITUDES: Magnitude, a logarithmic measure of the "size" of an
earthquake, is related to the energy released as seismic waves at the focus
of an earthquake. Although the magnitude scale has neither "top" nor
"bottom" values, the highest magnitude known was about 9.5, the lowest
about -3.0. On this logarithmic scale, a magnitude 6.0 shallow-focus
earthquake represents elastic-wave energy about 30 times larger than that
generated by a magnitude 5.0 earthquake, 900 times (30x30) larger than
that of a magnitude 4.0 shock.
Many factors influence the determination of earthquake magnitude,
including focal depth, distance between earthquake focus and observing
station, frequency content of the sampled energy, and earthquake radiation
pattern.
Magnitude values calculated by the USGS with a brief description of
parameters are shown below (see paragraphs under Contributed Magnitudes
for appropriate references):
Surface-wave (Ms): Magnitudes are computed for earthquakes that are
located at distances between 20 and 160 geocentric degrees from the
recording station, seismic-wave period between 18 and 22 seconds, and depth
is less than 50 km (generally Ms magnitudes are not computed for depths
greater than 50 km.
Body-wave (mb): Magnitude values are computed based on the seismic-wave
period greater than or equal to 0.1 and less than or equal to 3.0, and
distance is greater than or equal to 5 degrees.
Moment Magnitude (Mw): The magnitude is computed from a long-period
body- and mantle-wave moment tensor inversion method; it is also related
to the product of the area of the earthquake fault, multiplied by the
average fault slip over that area and by the shear modulus of the fault
rocks. The Mw value is approximately the same as the Ms magnitude value.
Energy Magnitude (Me): These magnitudes are computed from the radiated
energy using the method described in Choy and Boatwright (1995). The
energy radiated by an earthquake is estimated from the energy spectral
density of the broadband P waves (Boatwright and Choy, 1986). The Me can
complement moment magnitudes (Mw) in describing the size of an
earthquake. Me, being derived from velocity power spectra, is a measure of the
amount of damage that could be caused. Mw, being derived from
low-frequency asymptote of displacement spectra, is more physically related to
the final static displacement of an earthquake.
Local Magnitudes:
Local Magnitude (ML): This magnitude is generally referred to as the
true "Richter magnitude" (originally defined for California). The values
are computed for distances less than 600 km with depths less than 70
km. These estimates are computed in the western part of the United States
as well as world-wide, often using different calibrating functions.
Local or Regional Magnitude (Mn or MbLg): This value is calculated for
the area of North America east of the Rocky Mountains. It is computed
from the vertical component 1-second Lg seismic-waves (short-period
surface waves). It has also been used in other parts of the world, using
different calibrating functions.
Mahalo to hardin_r http://clubs.yahoo.com/clubs/worldseismicity
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 172 of 637: Marcia (MarciaH) * Sat, Apr 28, 2001 (11:12) * 26 lines
***********************************
Satellite imagry of the India Quake
***********************************
The earthquake that struck western India this January
brought water to places that had previously been dry. Shaken
by the 7.7 magnitude earthquake, water trapped between tiny
grains of sand and layers of mud beneath salt flats was
squeezed out and forced to the surface. This water is visible
in images from NASA's Multi-angle Imaging SpectroRadiometer
(MISR) and a perspective image combining data from the Shuttle
Radar Topography Mission (SRTM) and Landsat-7.
These images show how different Earth-observing
instruments can provide unique points of view of the same
phenomenon.
They are available online at:
http://www.jpl.nasa.gov/pictures/indiaearthquake
NASA's Jet Propulsion Laboratory is a division of the
California Institute of Technology, Pasadena.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 173 of 637: Marcia (MarciaH) * Thu, May 10, 2001 (03:43) * 55 lines
Post-Quake Stress May Cause Quakes
By ANDREW BRIDGES, AP Science Writer
A buildup of stress in the Earth's crust after an earthquake can trigger a
sequence of quakes on neighboring faults - sometimes years later, say
scientists who studied the two largest quakes to hit Southern California
in the last decade.
Seven years and a dozen miles separated the magnitude-7.3 Landers
and magnitude-7.1 Hector Mine earthquakes northeast of Los Angeles.
But the researchers say stress in the Earth's brittle upper crust following
1992 Landers quake likely triggered the second.
The first earthquake, followed hours later by the magnitude-6.5 Big
Bear earthquake, killed one person and caused $100 million in damage.
The 1999 Hector Mine quake resulted in few injuries or damage since it
struck a more remote area.
The report, published in Thursday's issue of the journal Nature, suggests
that careful monitoring of stress levels in the Earth's crust following
earthquakes can help scientists in their quest to predict quakes.
``It's a recognition that earthquakes do occur in clusters and sequences.
And if we can understand those sequences maybe we have a chance at
understanding when the next ones will occur,'' said Andrew Freed, a
geophysicist at the Carnegie Institution in Washington, D.C., and the
paper's co-author.
The estimated magnitude-7.8 earthquake that laid waste to much of San
Francisco in 1906 relieved so much stress that the region experienced
few quakes for decades.
But others, such as 1989's Loma Prieta magnitude-7.1 earthquake near
San Francisco that killed 69, may portend seismic activity to come,
Freed said.
In big earthquakes, Freed said, large amounts of stress are induced on
the Earth's lower crust and upper mantle. Those regions cannot sustain
the stress over time and slowly snap back.
As those regions relax, the stress is taken up by the upper crust,
eventually causing earthquakes that can hit, domino-like, months or
years later, Freed said.
That stress is relayed between faults, often over miles and years, is not
in dispute. Other models point to the movement of groundwater as the
prime relayer of the built-up stress.
``The basic tenets of the theory are pretty sound: When you move a
fault, you increase stress,'' said Susan Hough, a U.S. Geological Survey
seismologist.
http://dailynews.yahoo.com/h/ap/20010509/sc/delayed_quakes_1.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 174 of 637: Marcia (MarciaH) * Sun, May 13, 2001 (19:18) * 26 lines
From The Oregonian (Portland)
Sensors detect 'silent' quake
A slow-motion movement in 1999 around the Puget Sound area unleashes energy
equivalent to a big earthquake, scientists say
Saturday, April 21, 2001
By Brent Hunsberger of The Oregonian staff
Two summers ago, while the Seattle Mariners tried out their new baseball
stadium, much of Puget Sound moved several millimeters west. The earth
below unleashed as much power as February's 6.8-magnitude earthquake that
cracked Washington's state Capitol dome....
You should be able to get the whole story from:
http://www.oregonlive.com/news/oregonian/index.ssf?/news/oregonian/lc_71shift21.
frame
Note: URL includes word 'frame'.
----- earthquake WARNING research -----
--- animals, people, scientific evidence ---
--- http://www.earthquakewarning.org ---
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 175 of 637: Marcia (MarciaH) * Sun, May 13, 2001 (19:21) * 3 lines
the above unfelt 6.8 quake is at url
http://www.oregonlive.com/news/oregonian/index.ssf?/news/oregonian/lc_71shift21.frame
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 176 of 637: Marcia (MarciaH) * Mon, May 14, 2001 (13:28) * 95 lines
News Release
U.S. Department of the Interior
U.S. Geological Survey
Release Date:
May 14, 2001
Yellowstone Volcano Observatory Established U.S. Geological Survey, Yellowstone National Park and the University of Utah Partnership
May 14, 2001 ? The U. S. Geological Survey (USGS), Yellowstone National
Park and the University of Utah have signed an agreement to establish the
Yellowstone Volcano Observatory to strengthen long-term monitoring of
earthquakes and the slumbering volcano beneath Yellowstone National Park.
This agreement provides for improved collaborative study and monitoring of
active geologic processes and hazards of the Yellowstone volcanic field and
caldera, site of the largest and most diverse collection of natural hot
springs, mud pots and steam vents in the world.
"The new observatory will improve our efforts to monitor Yellowstone's
extraordinarily large and long-lived volcanic system," said USGS scientist
Robert L. Christiansen, Scientist-in-Charge of the new observatory.
Christiansen was the Scientist-in-Charge of the Mount St. Helens monitoring
effort during the 1980 eruption. "This agreement is a natural evolution of
our collective work over the years to track and study Yellowstone's unrest.
There is no increased threat of eruptive activity at Yellowstone to cause
concern at this time. We will use YVO to share what we are learning with
the public, Park visitors, and nearby residents, and to be in a better
position to provide warning of any future hazardous activity."
The Yellowstone Volcano Observatory (YVO) is the fifth such observatory in
the United States and will be based from existing facilities at the USGS,
the University of Utah and Yellowstone National Park. The new observatory
is modeled after the USGS volcano observatories in Hawaii, Alaska,
California and the Pacific Northwest. The observatories employ a variety
of ground-based instruments and satellite data to monitor active and
restless volcanoes and conduct a variety of studies to understand their
eruptive and seismic histories and potential hazards. Together, the five
observatories monitor 43 of the 70 or so potentially hazardous volcanoes in
the United States. The five observatories are operated under the auspices
of the USGS Volcano Hazards Program.
The Yellowstone National Park and surrounding area encompass the largest
active magmatic system in North America. The spectacular geysers, boiling
hot springs, and mud pots that have made Yellowstone famous owe their
existence to volcanic activity that has affected the region during the past
2 million years.
"The extensive thermal features of Yellowstone National Park are fueled by
heat from a large magma chamber beneath the caldera. The chamber is fed
from a magma source in the Earth's deep interior that collectively form the
Yellowstone hotspot," said Robert B. Smith, University of Utah Coordinating
Scientist of YVO. "In the past decades we've measured the ground across
the youngest caldera rising as much as three feet and falling by a foot.
This active deformation was accompanied by thousands of small earthquakes,
marking the Park as a living geologic system."
Cataclysmic explosive eruptions 2 million, 1.3 million, and 640 thousand
years ago ejected huge volumes of molten rock and formed large overlapping
elliptical depressions called calderas. The youngest caldera in the Park,
about 50 miles long and 30 miles wide, has been buried by the most recent
eruptions of thick lava flows between about 75,000 and 150,000 years ago.
Yellowstone region is seismically active. The 1959 Hebgen Lake earthquake
(surface-wave magnitude 7.5), centered just outside the Park's northwestern
boundary was responsible for 26 of the quake's 28 deaths. This event is
one of the 15 strongest earthquakes ever recorded in the contiguous U.S.
"While the active geologic processes at Yellowstone do impart some risk to
the public, they also make it a unique treasure ? it is the volcanic and
seismic energy that powers the geysers and hot springs, creates the
mountains and canyons, and generates the unique ecosystems that support
Yellowstone's diverse wildlife," notes Paul K. Doss, Yellowstone National
Park Coordinating Scientist of YVO. "YVO will help the Park's interpretive
and education programs with strong outreach efforts to inform the public
about the impact of geological activity on the character of Yellowstone."
Information about Yellowstone and the Volcano Observatory is available
online at:
U.S. Geological Survey Yellowstone Volcano Observatory
http://volcanoes.usgs.gov/yvo/
University of Utah http://www.seis.utah.edu/yvo
University of Utah http://www.mines.utah.edu/~rbsmith/RESEARCH/UUGPS.html
National Park Service http://www.nps.gov/yell/
Additional contact information:
Carolyn Bell (USGS), 703-648-4463, cbell@usgs.gov
Lee Siegel (Utah), 801-581-8993, leesiegel@ucomm.utah.edu
Cheryl Matthews (NPS), 307-344-2013, Cheryl_Matthews@nps.gov
The USGS serves the nation by providing impartial scientific information to
describe and understand the Earth, its resources and processes; minimize
loss of life and property from natural disasters, manage water, biological,
energy, and mineral resources; and enhance and protect our quality of life.
*******USGS*****
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 177 of 637: Marcia (MarciaH) * Tue, Jun 12, 2001 (16:46) * 26 lines
John Tsatsaragos gave me persmission to post this. Mahalo, John!
Association between EQ’s and Moon Phases
What happens really?
As we are known well, the earth’s upper crust in one place is moving up and down every 6 hours by the combination of the tidal gravity forces and the centrifugal force from the earth’s rotation around its axis. The amplitude of this moving it depends on relative position of the sun and the moon or simply according to moon phase.
This amplitude is high at full or at new moon and low at first quarter or last quarter. Also, this amplitude is higher at earth’s places were applying the resultant gravity force from the sun and the moon.
What happens in place were exists a fault? What happens there when the ground is moving up and down?
When the ground is moving up, each side of the fault feel inclined to draw away from the other side. So, the pressure at the fault sides tends to reduce. As the ground is moving higher, so much lower pressure applied.
When the ground is moving down each side of the fault feel inclined to converge the other side. So, the pressure in the fault sides tends to increase. As the ground is moving lower, so much higher pressure applied.
These alternations in the pressure value are added to the pressure values by the continue movement of tectonic plates. So, is varying the total pressure value.
From the other hand it happens a ground deformation (and an EQ) when the pressure exceeds the pressure-breaking limit in three cases:
When the two sides of the fault, feel inclined to converge each other (collision).
When one side of the fault, feel inclined to deflect from the other side (expanding).
When one side is sliding on the other side.
Conclusions
Having in mind the upper things:
The EQ’s occur not randomly in the time but in specifically moments.
We can to say that the daily max amplitude of tides on the earth’s crust it depends on moon phases.
Does not happen any EQ, if the pressure (from the plates continues moving) on the fault sides is already enough lower than the breaking limit.
Main is the value of this pressure and after that the moon phase.
Criterion for the fact that high pressure on a fault exists or not, can be the piezoelectric voltage (produced on the rocks), which alternate, in the same rhythm with tides on the ground. This is the base for my method to predict respecting near EQ’s. This method it seems finely good.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 178 of 637: Rob Glennie (AotearoaKiwi) * Sun, Jun 24, 2001 (03:51) * 7 lines
Hi
A big earthquake hits Peru and all this topic has to say is a deafening silence?? What use is that??
Nah, just joking, though I had expected a few messages of concern here and there and in Peru because an Mw 8.1 is NO mean feat.
Rob
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 179 of 637: Marcia (MarciaH) * Sun, Jun 24, 2001 (19:29) * 1 lines
Rob, this is my little goof. I mamaged to delete this topic, and before I could regain it, I created topic 26 to carry on. This one I try to save for the lengthy stories to augment 26's updates. If they are crucial, they go on Geo 1 where all things of immediate import. Further posts on Peru will go here and the stats and others will continue on 26, but we don't necessarily follow the rules around here. Just get the need for preparedness out!!!!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 180 of 637: Marcia (MarciaH) * Sun, Jun 24, 2001 (19:34) * 36 lines
http://dailynews.yahoo.com/h/nm/20010624/ts/quake_peru_dc_11.html This url will not only tell you the tale below, it has a video attached!
Peru Scours Hills, Sea for Quake Victims
By Eduardo Orozco
AREQUIPA, Peru (Reuters) - Teams of emergency workers scoured Peru's southern mountains and coast on Sunday to find survivors and ferry blankets, tents, food and medicine to thousands of people left homeless after a quake killed dozens of people and injured hundreds more.
Littering southern Peru with rubble and debris, the 7.9-magnitude earthquake flattened mountain villages, triggered mudslides that blocked highways and wrecked homes, churches and schools in cities.
``Please help us, we've lost everything,'' wailed Maria Luis Arbului, whose house where she lived with her daughter was destroyed. ``The rocks took my bed and my furniture and now I'm left out on the street.''
Authorities initially estimated about 50 people died and emergency workers predicted the toll could rise. By Sunday afternoon, civil defense officials said they had confirmed 38 people dead.
In this devout nation of 26 million, mourners paraded religious figures through the streets of Arequipa, one of the worst-hit urban areas, and asked for protection from powerful aftershocks that rocked Peru's second-largest city.
A DAMAGED CATHEDRAL
In this colonial ``White City,'' the mourners stepped through tumbled masonry on streets lined with damaged historic houses. One of the towers of the cathedral -- founded in 1612 and a now major tourist attraction -- toppled in the quake.
Arequipa sits on a high Andean plain 630 miles south of Lima, beneath the snow-capped volcano ``El Misti.''
Spilling out of overcrowded hospitals, some of the injured lay outside in the streets on beds with intravenous drips.
``We're terrified about aftershocks. Our hotel almost collapsed,'' said Santiago Freitas, 32, a Portuguese tourist.
Red Cross officials said the coastal town of Camana was struck by a tidal wave on Saturday that destroyed houses. Some 36 people were reported missing and Arequipa police said ``cadavers keep washing up from the sea.''
By early on Sunday, there were 26 aftershocks with up to a 6.2 magnitude, Peruvian officials said.
With thousands of survivors throughout the highlands huddling under blankets shivering in the winter cold of the Southern Hemisphere, President Valentin Paniagua directed the massive relief operation. He flew to assess damage in several towns, including Moquegua, 856 miles south of Lima, where he said the situation was ``heart-wrenching.''
The interim leader declared a state of emergency in the entire affected region, promising assistance in transferring the injured to medical centers along with government funding and credit for obliterated homes.
The military scoured isolated rural areas of mainly mud-brick built homes to identify worst-hit villages and take supplies to survivors dotted across hillsides, who had been cut off from their families following the quake.
But scant resources in this impoverished nation impeded rescue efforts. ``We are planning to go out and look for disappeared people but we don't have the money for gas for the journey,'' said Moises Gonzalez of Arequipa's Red Cross.
FATE OF REMOTE VILLAGES UNKNOWN
President-elect Alejandro Toledo arrived in Arequipa after postponing a trip to the United States to ``extend a hand of solidarity.'' He told CPN radio he would seek assistance for the affected when he did make his planned trip.
Maria Colchon, 40, attended a Mass outside a damaged church with teetering columns. ``I've come here to give thanks for my son, who was hit by a falling wall but was saved,'' she said.
The International Committee of the Red Cross feared the official death toll would mount, especially in the many mud-and-brick peasant homes in isolated highland villages in southern Peru.
``We are concentrating on the likelihood that the casualties will increase, particularly in terms of homeless people,'' Ian Logan of the ICRC told CNN in an interview from the committee's headquarters in Geneva.
Local officials said they were communicating by radio with some rural areas, but that severed lines impeded contact.
Peru said the earthquake had a magnitude of 6.0 but the U.S. Geological Survey reported it as magnitude 7.9. It was Peru's strongest quake since 1970, when a quake of the same magnitude killed 70,000 and left some 600,000 homeless.
The quake struck at 3:33 p.m. Its epicenter was 51 miles northwest of the southern town of Ocona, Peru's Geophysical Institute said.
``In this particular area, it's the worst (earthquake) since 1913,'' Waverly Person, geophysicist at the U.S. National Earthquake Information Center, told Reuters.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 181 of 637: Marcia (MarciaH) * Mon, Jun 25, 2001 (18:50) * 51 lines
Regarding the Great Quake in Peru - From Sandi, the resident Seismologist at http://clubs.yahoo.com/clubs/worldseismicity
This is a good quake to illustrate aspects of the different magnitude
scales.
The different scales were calibrated to give numbers similar to the
Richter ML (Local) magnitude, but since the measurements are carried out
with different kinds of waves there is always some mismatch.
The Ms 8.2 of this quake is the surface wave magnitude, based on the
Raleigh surface waves that follow the earth's surface, in the period
range from 18 to 22 s., with a speed less than S-waves. There is no
correction applied for the depth of the quake since this scale is best used
for shallow quakes.
The preliminary postings of magnitude can be confusing because the
scale used to measure the event is usually not yet indicated. So, yesterday
we first saw a M 7.9, then we saw Peru give a M 6.0, and a short time
later a M 6.9, which blew me away. I knew that the M 6.0 had to be the
Richter magnitude which many countries still use, but that isn't an
accurate measure for quakes above about M 6.0. This quake easily saturated
the Richter magnitude scale. When I saw the M 6.9, I didn't know what
to think except that it was probably a Richter magnitude.
The Mb (body-wave) scale utilizes compressional body P-wave amplitudes
with generally 1 s-period P waves. But, the maximum body-wave
magnitudes are about 6.5 - 6.8. So, I would not tend to think of a M 6.9 as a
body-wave magnitude, but that's what it was! This earthquake saturated
the body-wave magnitude scale. That was a given, since larger
earthquakes, which have larger surface ruptures, radiate more long-period energy.
So, body-wave magnitudes totally underestimate the true size of a great
quake, and are best used for deeper focused quakes.
However, the surface wave magnitude scale also saturates above 8.3 -
8.7. This is because damage to structures is often caused by energy at
shorter periods. Therefore, the 1960 Chile earthquake and 1964 Alaska
quakes were first calculated to be within that range and had to be
recalcuated later.
This quake didn't saturate the surface wave scale, so this scale could
give a good estimation of it's size. The difference between M 8.1 and M
8.2 is fairly insignificant.
If this quake had exceeded the saturation point of the surface wave
magnitude scale, then it could not have been utilized. Therefore, a method
needed to be developed that would accurately measure the largest quakes
on the planet.
The Moment magnitude scale (Mw), now the preferred scale, accounts for
much more than the amplitude of ground motion, the corresponding period
in seconds, and a correction factor for the distance between the
epicenter and stations, and the focal depth of the quake.
The Mw 8.1 and the Mw 8.0 are the moment
magnitudes calculated by the USGS and Harvard, respectively. It's late
here. I'll leave the fault geometry and the seismic moment Mo used to
calculate the Moment magnitude until tomorrow.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 182 of 637: Marcia (MarciaH) * Tue, Jun 26, 2001 (19:49) * 15 lines
Quake Victims Rally Around Cathedral
By CRAIG MAURO, Associated Press Writer
AREQUIPA, Peru (AP) - One steeple is toppled and large chunks have fallen from the other. An intricate bell tower lies shattered on the ground. The altar has collapsed, buried under steel beams.
In a city that has been named a world cultural treasure by the United Nations (news - web sites) for its architecture, the damaged 17th-century Cathedral has become a rallying point for Peruvians digging out after a weekend earthquake that killed 102 people.
Since the 8.1-magnitude temblor, thousands of residents of this Andean highland city have flocked to the imposing stone edifice.
``We Arequipans have a lot of courage and strength,'' said Jorge Rosada, a vegetable farmer, watching the effort already under way. ``I think the entire town is going to recoup its strength - and recover our cathedral.''
Church workers wearing smocks and hardhats hauled away debris in wheelbarrows with the help of cadets from Arequipa's police academy.
``It's a top priority for us to restore it,'' said Mayor Juan Manuel Guillen. ``Arequipans are warriors, we don't give up. We're a little beaten up right now, but we will prevail.''
Nestled amid the Andes mountains 465 miles southeast of Lima, Arequipa is nicknamed Peru's colonial ``White City'' because of its brightly colored buildings that sparkle in the sun. Colonial-era mansions line the downtown streets, with Spanish-style courtyards peeking out from behind facades of carved volcanic rock and wooden balconies.
But the city is located in an area prone to earthquakes.
Before Saturday, its residents had suffered through four major quakes - in 1687, 1868, 1858, and 1960. The church, built in 1656 and known simply as the Cathedral, weathered the natural disasters, although suffered extensive damage in 1868. It also survived an 1844 fire.
more... http://dailynews.yahoo.com/h/ap/20010626/wl/peru_earthquake.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 183 of 637: Marcia (MarciaH) * Tue, Jun 26, 2001 (20:50) * 22 lines
Rob reports New Zealand got a 20 cm tsunami from the recent 8.1 Magnitude quake.
Sandi reports this day in history http://clubs.yahoo.com/clubs/worldseismicity
The M 6.2 Hawaiian Earthquake of 1989
26 Jun 1989 HAWAII 03:27:03.9 19.217 N 155.050 W
Dep: 9 MD 6.2 (HVO). Ms 6.2 (BRK), 6.2 (PAS).
Two events about 5 seconds apart. Five people injured slightly, 5 homes
destroyed and about 100 homes damaged in the Puna District. Landslides
occurred in several places and blocked a road at Honomu. Slight damage
(VI) at Hawaii National Park, Hilo, Honomu and Keaau. Felt (V) at
Honokaa, Kapaau, Kurtistown, Ninole, Ookala, Paauhau and Volcano; (IV) at
Hakalau, Hawi, Holualoa, Honaunau, Laupahoehoe and Pahala. Felt
throughout the island of Hawaii. Also felt on
Maui and Oahu. A small tsunami was generated with maximum wave heights
(peak-to-trough) of 57 cm at Honuapo, 21 cm at Kapoho and 14 cm at
Hilo. The focal mechanism is moderately well controlled and corresponds to
reverse faulting with a moderate strike-slip component.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 184 of 637: Marcia (MarciaH) * Tue, Jun 26, 2001 (20:57) * 8 lines
I remember this quake. As I reported, this was quite a strong shove. I was not home. My then husband was at the university watching the tropical metal roofs flap up and down. My son was in school under his desk, and I was on my way home in a car. We pulled over as we are taught to do (not stop dead in the streets as they tell you in the earthquake tests becuase you wills surely cause a pileup of cars if you do!) When I got home I found my large 12 segment candelabra flung across the room and the unlit candles scattered everywhere. I got rid of the candelabra straight away. I needed no further warnings as to the hazard.
http://clubs.yahoo.com/clubs/worldseismicity
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 185 of 637: Marcia (MarciaH) * Wed, Jun 27, 2001 (18:56) * 31 lines
Liam, what a concept! Thanks for sending this from The Electonic Telegraph:
Is the real Nessie just a case of the shakes?
By Roger Highfield
THE Loch Ness monster stirs from her underwater lair when the earth
shakes, according to a geological explanation unveiled today at an
international scientific meeting.
Decades of argument about whether the lake is inhabited
by a dinosaur-like monster may be ended by the new
theory advanced by Dr Luigi Piccardi of the Centro di
Studio dell' Appennino e delle Catene Perimediterranee in
Florence.
The first record of the monster in the seventh century was inspired by an
earthquake, according to Dr Piccardi, a geologist who specialises in seeking
links between myths and geological phenomena.
He argues that the most convincing of the many thousands of recent sightings
agree on few details except that the "monster" creates a huge splash and
commotion in the loch, similar to the wake of an earth tremor.
Dr Piccardi presented his theory yesterday in Edinburgh at Earth System
Processes, a meeting organised by the Geological Society of London and the
Geological Society of America. The scientist, who believes studies should be
conducted to link seismic activity with unusual water movements in the loch,
has not yet discussed his paper, Seismotectonic origins of the monster of
Loch Ness, with Nessie hunters.
more... http://www.telegraph.co.uk/et?ac=004826292612046&rtmo=wKwejQtb&atmo=rrrrrrrq&pg=/et/01/6/27/ness27.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 186 of 637: Marcia (MarciaH) * Fri, Jun 29, 2001 (23:07) * 51 lines
Sandi the Seismologist in http://clubs.yahoo.com/clubs/worldseismicity
In contrast to the previously discussed magnitude scales, the moment
magnitude scale accounts for much more than the amplitude of ground
motion, the corresponding period in seconds, and a correction factor for the
distance between the epicenter and stations, and the focal depth of the
quake.
The peak amplitude of a wave, which the mentioned magnitude scales use
to determine the size of a quake, can be compared to the strongest gust
of wind in a windstorm, which alone is not a reliable measure of the
overall force of the windstorm. It does not measure the overall
mechanical power of the source.
Seismologists have, therefore, turned to classical mechanics in which
movement results from the application of forces. To illustrate: If you
place both hands on the edge of a heavy table, and push on one while
pulling the other horizontally, the more widely separated your hands,
thereby increasing the leverage, the easier it is to rotate the table. The
two equal and opposite forces are called the force "couple". The size
of the couple is it's "moment," FL, the product of the value of one of
the two forces F and the distance L between them. That concept is
applied to the combination of forces that produce slip on a fault.
The seismic moment of earthquakes, Mo, is a measure of earthquake size
related to the leverage of the forces (couples) across the area of
fault slip, the rigidity of the rock times the area of faulting times the
amount of slip, and is related to the total energy released in the EQ.
The seismic moment can also be estimated using geodetic or field
measurements of the fault source slip.
The size of an earthquake can be described by the fault geometry and
seismic moment. The fault geometry and the wave amplitudes are used to
compute moment. The fault geometry is determined from a waveform analysis
of the seismograms recorded at the various stations at varying
distances and azimuths from the earthquake. The differing shapes and directions
of motion of the recorded waveforms are used to determine the geometry
of the fault that has ruptured.
The overall geometry of the ruptured fault includes the direction of
fault movement, the average displacement (slip) of the fault plane, the
surface area of the fault, the orientation of the fault, and the
rigidity (shear strength) of the material of the fault.
The moment, Mo, is then converted into a number similar to other
earthquake magnitudes by a standard formula. The result is called the moment
magnitude, Mw. The moment magnitude provides an estimate of earthquake
size that is valid over the entire range of magnitudes, the
characteristic that was lacking in other magnitude scales.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 187 of 637: Marcia (MarciaH) * Fri, Jun 29, 2001 (23:20) * 7 lines
There will be a quiz on this tomorrow !
Fantastic job, Sandi! Thanks for sharing what comes so naturally to you to us who just quake along with the rest of the earth.
She also sent this which I will repost on Geo 49
http://www0.mercurycenter.com/special/homepage/graphics/quake.pdf
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 188 of 637: Marcia (MarciaH) * Sun, Jul 1, 2001 (14:05) * 4 lines
Regarding the above post, I didn't because you need the Adobe Acrobat graphics to see it properly.
For everything you ever wanted to know about earthquakes, and then some:
http://www.mysteries-megasite.com/main/bigsearch/earth-3.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 189 of 637: Marcia (MarciaH) * Sun, Jul 1, 2001 (14:44) * 8 lines
Ropb back to your question on the cause of the Alps, the net is full of scholarly theories all reducing down to the single idea such as this
Causes of Earthquakes
- Two main belts: Pacific Rim and Portugal to S. Asia
1) In the Pacific, earthquakes are related to the giant convection currents moving the ocean floor.
2) The belt of earthquakes passing through the continental mountain ranges of the Alps, Andes, Himalayas could be the result of mountains growing and decaying - this is called orogenesis . Erosion wears down the mountains making them lighter. To reach a state of equilibrium (theory of isostasy ) other areas rise causing earthquakes.
Note the use of the words "probable" and "could be"
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 190 of 637: Marcia (MarciaH) * Sun, Jul 1, 2001 (14:47) * 4 lines
The collision of the African and European plates that started during the Cretaceous resulted in the formation of the Alps. This orogenic event followed a period of extension during which these two plates moved apart. This separation, which began as early as the late Permian, was triggered by the initial formation of the Atlantic Ocean. While the Atlantic formed to the West, the Tethys
Ocean formed between Europe and Africa. The Tethys was a North-Northeast trending ocean that was bound by the European/Iberian margin to the west and the Adriatic promontory of Africa to east. This ocean began closing during the Cretaceous as Africa moved towards the northeast and the opening Atlantic pushed Southern Europe to the east. The oceanic crust of the Tethys then began being subducted beneath the African plate and a series of ophiolite nappes formed along the edge of the subducting oceanic crust. This initial stage of deformation also resulted in the formation of the Pyrenees as the Iberian sub-plate was pushed into the southern part of the European plate. The main alpine deformation, however, ocurred during the Tertiary as the African plate rotated in a counter clockwise direction and moved in an increasingly Northwestern direction relative to a stationary Europe. This motion led to a series of collisional structures that are the Alps.
more... http://love.geology.yale.edu/kgl/Dept_Information/FieldTrips/ALPS96/alps96.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 191 of 637: Marcia (MarciaH) * Fri, Jul 6, 2001 (20:37) * 114 lines
You thought I had run out of places that quake?
---------------------------------------------------------------------------------------------------------------------------------------------------------------
Year Mo Da Hr Min Lat Long Depth Mag Int Number Death Millions
Damage Tsunami Geographic Location Data
Source (Reference)
(km) Deaths Des $ Damage
Des Assoc.
---------------------------------------------------------------------------------------------------------------------------------------------------------------
425 0 0 0 0 31.5 35.1 0 0.0 10 0 0.000
3 ISRAEL: JERUSALEM,PALESTINE,RAMLEH; EGYPT 222
447 0 0 0 0 31.5 35.1 0 0.0 9 0 0.000
3 ISRAEL: JERUSALEM; EGYPT; SYRIA; TURKEY: ANTAKYA 222
551 7 9 0 0 33.9 35.5 0 0.0 10 0 0.000
3 1 LEBANON: BAYRUT (BEIRUT); EGYPT; IRAQ;SAUDI ARABI 57,222
856 12 3 0 0 37.0 10.0 0 0.0 10 45000 3 0.000
4 TUNISIA: TUNIS; SYRIA; EGYPT; YEMEN 98,225
* 859 4 8 0 0 36.2 36.1 0 0.0 0 0 3 0.000
4 TURKEY: ANTIOCH; EGYPT; IRAQ: MESOPOTAMIA; USSR 57
885 0 0 0 0 30.0 31.1 0 0.0 10 0 0.000
EGYPT: AL-QAHIRAH (CAIRO) 222
* 1033 0 0 0 0 31.9 35.2 0 0.0 11 70000 3 0.000
3 ISRAEL: RAMALA,GHAZZAH,NABULUS; EGYPT; SYRIA 222
* 1067 0 0 0 0 31.9 34.9 0 0.0 11 25000 3 0.000
3 ISRAEL: RAMLA; SYRIA: DIMASHQ (DAMASCUS); EGYPT 222
1070 2 25 0 0 30.0 31.1 0 0.0 0 0 0.000
2 EGYPT: AL-QAHIRAH (CAIRO); ISRAEL: JERUSALEM 222,225
* 1138 0 0 0 0 36.1 37.2 0 0.0 0 100000 3 0.000
4 EGYPT-SYRIA 57
* 1138 0 0 0 0 36.1 37.2 0 0.0 0 100000 3 0.000
3 EGYPT-SYRIA 57
* 1201 0 0 0 0 34.3 35.5 0 0.0 10 30000 3 0.000
3 LEBANON: TARABULUS,TYRE;ISRAEL;EGYPT;IRAQ;SYRIA 222
* 1201 7 5 0 0 28.0 33.0 0 0.0 9 30000 3 0.000
3 EGYPT: UPPER; SYRIA 57
* 1201 7 5 0 0 28.0 33.0 0 0.0 9 1100000 3 0.000
4 EGYPT: UPPER; OR SYRIA 57,98
1211 6 15 0 0 30.5 31.3 0 0.0 0 0 3 0.000
EGYPT: AL-QAHIRAH (CAIRO) 98
1303 8 6 0 0 36.3 32.1 0 0.0 0 10000 3 0.000
4 EGYPT: ALEXANDRIA; GREECE: PELOPONNESUS,IRAKLION
51,55,98
1481 0 0 0 0 30.0 31.1 0 0.0 7 30000 3 0.000
EGYPT: AL-QAHIRAH;ISRAEL;SYRIA;SAUDI ARABIA:MAKKA 222
1754 9 0 0 0 30.0 32.0 0 0.0 0 40000 3 0.000
3 EGYPT: AL-QAHIRAH (CAIRO) 55,73
* 1822 8 13 18 0 36.0 36.0 0 0.0 10 2000 3 0.000
3 TURKEY: ANTAKYA; SYRIA: HALAB; EGYPT: ALEXANDRI 99,55
1847 8 7 0 0 29.5 30.5 0 0.0 11 126 3 0.000
3 EGYPT: AL-FAYYUM 99,180
* 1856 10 12 0 0 0.0 0.0 0 0.0 0 10 1 0.000
EGYPT: N 180
1926 6 26 0 0 0.0 0.0 0 0.0 0 12 1 0.000
EGYPT: LOWER 180
* 1955 9 12 6 9 32.2 29.6 0 6.3 0 18 1 0.000
EGYPT: NILE DELTA 138
* 1955 9 12 6 9 32.2 29.6 0 6.7 0 22 1 0.000
EGYPT: MEDITERRANEAN SEA: E 40
* 1955 9 12 6 9 32.5 29.6 0 6.5 0 20 1 0.000
3 EGYPT: MEDITERRANEAN SEA: E 14
1969 3 31 7 15 27.7 34.0 33 7.1 0 2 1 0.000
3 EGYPT: BENI-SOUEF, AL-QAHIRAH (CAIRO) 11,53
1981 11 14 9 5 23.8 32.6 25 6.0 8 0 0.000
2 EGYPT: ASWAN 232
1992 10 12 13 9 29.8 31.1 22 5.9 0 552 3 300.000
4 EGYPT: CAIRO 53
1995 11 22 4 15 28.8 34.9 10 7.3 12 1
2 EGYPT: NUWAYBI; SAUDI ARABIA; ISRAEL; JORDAN 53
Information Regarding the Significant Earthquake Database
PLEASE NOTE:
Multiple entries indicated by an asterisk (*) before the Year are given
when references offer substantially
different information.
The Date and Time (Year Mo Da Hr Min) are given in Universal
Coordinated Time (UTC), the same as
Greenwich Mean Time (GMT).
When a description instead of an actual number of deaths or dollar
damage was included in the literature,
the description was coded in columns Death Des and Damage Des. The
codes should be interpreted as
described below:
Death Description:
1 = FEW
2 = SOME
3 = MANY
Damage Description:
1 = LIMITED (roughly corresponding to less than $1 million)
2 = MODERATE (roughly corresponding to $1 to $5 million)
3 = SEVERE (roughly corresponding to $5 to $25 million)
4 = EXTREME (roughly corresponding to $25 million or more)
The value in the Millions $ Damage column should be multipled by
1,000,000 to obtain the actual dollar
amount.
A 1 in the Tsunami Assoc. column indicates that a tsunami was generated
by the earthquake.
References are associated with the numbers in the Data Source column.
http://www.ngdc.noaa.gov/seg/hazard/sig_ref.html
http://www.ngdc.noaa.gov/cgi-bin/seg/haz/ffq_result.pl
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 192 of 637: Marcia (MarciaH) * Sun, Jul 8, 2001 (00:02) * 23 lines
More of the Nessis-Causing-earthquakes saga:
The UK Government s geological agency, the British Geological Survey believes it unlikely that the Loch Ness Monster is caused by earthquakes, according to a statement issued last week.
The official report was prompted by the debate over the work of Italian neotectonics expert Dr Luigi Piccardi, who presented his speculative theory at a poster session during the recent Earth System Processes meeting in Edinburgh, hosted jointly by the Geological Society of London and the Geological Society of America.
The theory draws on information which is considerably out of date, and the reporting of it has led to the circulation of erroneous ideas which need to be corrected the Survey statement said. Detailed consideration of Piccardi's hypothesis shows it to be false for a number of reasons.
Dr Piccardi believes that earthquakes on the Great Glen Fault, which runs under the Loch, might be associated with some supposed sightings when the surface water of the Loch is disturbed, possibly by waves or the release of gases from the bottom sediments.
The statement continued: A number of earthquakes that have in the past been attributed to the Great Glen Fault actually occurred elsewhere. Piccardi suggests that an earthquake in 1934 was responsible for sightings of the Loch Ness Monster in 1933 and 1934. This earthquake occurred in Torridon, in the NW of Scotland, about 60 km away from Loch Ness, and was felt over the whole of the north of Scotland.
The BGS pointed out that according to its records, modern monster sightings at Loch Ness have not been accompanied by earthquakes. The seismic monitoring network run by BGS would have recorded any such events down to magnitude 2 since 1970.
BGS experts say that the number of observations of the effects of earthquakes in Scotland, historical and modern, is very large. "None of these make any confusion or comparison with monsters, and there is no reason to suppose that people cannot tell the difference between these two phenomena says the Survey.
The statement ends: We therefore conclude that the hypothesis that earthquakes can explain sightings of the Loch Ness is untenable .
The official report will add weight to the views already expressed by Nessie hunters, most of whom have poured scorn on the Piccardi hypothesis. One was quoted in The Daily Mail as saying that any gasseous emissions from Loch Ness were more likely to be Nessie breaking wind .
Thanks Liam - this is truly amazing!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 193 of 637: Marcia (MarciaH) * Mon, Jul 9, 2001 (14:19) * 36 lines
1971
Chile
7.5
84 people were killed, 447 injured, and 40,000 made homeless
by this earthquake. The earthquake was centered 75 miles
northwest of Santiago. Thousands were without electricity,
drinking water, or telephones and some communities were isolated
by landslides. The port city of Valparaiso was among the hardest
hit. In Santiago frightened crowds rushed into the streets. Walls
were cracked and water mains ruptured sending water spurting
into the streets. The shock was felt as far away as Buenos Aires,
Argentina, 650 miles to the east. A 1.2-meter tsunami was
observed at Valaparaiso.
1975
Western Minnesota
5.0
The largest historical earthquake in Minnesota.
1997
Near Coast of Venezuela
7.0
At least 81 people killed, 522 injured, extensive damage and
landslides in the Cariaco-Cumana area. At least 3,000 people
were left homeless. Several people injured in the
Barcelona-Puerto La Cruz area. Some damage on Isla de
Margarita. Power, telephone and water services disrupted on Isla
Coche and Isla de Margarita. Felt in much of northeastern
Venezuela and as far west as Maracaibo. Felt (V) on Trinidad.
Also felt on Tobago.
From Significant Earthquakes of the World 1997.
1998
Azores Islands
6.2
Ten people killed, about 100 injured and 1,000 left homeless on
Faial. Some damage on Pico and Terceira. Felt on Corvo and San
Jorge.
From Significant Earthquakes of the World 1998.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 194 of 637: Marcia (MarciaH) * Thu, Jul 12, 2001 (00:24) * 25 lines
Scientists Devise Technique That More Accurately Estimates Age of Shallow Faults Near Earth's Surface
ANN ARBOR, Mich., July 11 (AScribe News) -- A new approach developed by scientists at the University of
Michigan and ExxonMobil Upstream Research Company allows direct dating of faults---surfaces along which rocks
break and move---near Earth's surface. A report on the work appears in the July 12 issue of the journal Nature.
Dating shallow faults is essential to understanding the evolution of Earth's crust, the interactions among the plates
that make up Earth's surface, and the processes by which faults are activated and reactivated, explains Ben van der Pluijm, professor of geological sciences at U-M. For some time, scientists have been able to directly determine the
ages of deeper rocks, but until now the age of shallow crustal faults could only be inferred through indirect dating methods---by studying the ages of fossils in associated deposits, for example. Such estimates can suggest only a
broad age range spanning many million years, not a precise age. The technique described in Nature, however, narrows down the age to within a couple of million years---practically pinpoint accuracy in geologic terms.
The researchers used the new method, which combines several approaches, to carefully analyze clays from near-surface faults in the Canadian Rocky Mountains. "That's an extremely well-studied area geologically, but there
have been few reliable absolute ages on the faulting," says van der Pluijm. As a result, "we have not been able to get a firm handle on how fast processes like mountain building occur, when old faults stop being active and when new
ones kick in, and the link between global plate tectonic processes and their surface expression," he says.
That kind of information has more than academic value, says van der Pluijm: "If you remember the stories about earthquakes in California, they often occur along faults we hadn't really seen active before. It's not because they
weren't there; they just hadn't been activated in recent record." While the new method probably never will help scientists predict exactly when earthquakes will strike again at a specific fault, it should provide more general insights
into the fault processes involved.
"If we understand more about the rates of these processes, we'll understand more about recurrence in general, and we'll get a better understanding of the mechanical behavior of the outer part of Earth," says van der Pluijm. "So we might ultimately get a better handle on the activation and reactivation of faults."
Van der Pluijm collaborated on the research with U-M research scientist Chris M. Hall, and Peter J. Vrolijk, David R. Pevear and Michael C. Covey of ExxonMobil Upstream Research Co. in Houston, Texas. The work was supported by the National Science Foundation and Exxon Production Research Co.
Web: http://www.umich.edu/~newsinfo/
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 195 of 637: Marcia (MarciaH) * Mon, Jul 16, 2001 (15:41) * 17 lines
Large earthquakes also follow the law
For many years, there has been a debate about why large
earthquakes do not appear to fit the scaling laws for smaller
earthquakes. This observation would seem to imply that the
physics of large earthquakes is somehow fundamentally
different from that of smaller events. Shaw and Scholz ["Slip-
length scaling in large earthquakes: Observations and theory and
implications for earthquake physics"] bring together recently
compiled observations of large aspect ratio earthquakes and a new
3-D dynamic earthquake model to show that the larger earthquakes
do, in fact, follow the same scaling laws as the smaller events.
These new results generate renewed confidence in using
observations of more common smaller earthquakes to predict the
effects of the rare and damaging great earthquakes.
The above is from the prolific and fantastic Liam. I wish he had included more of the article and from whence it had come. Liam, luv, are you out there?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 196 of 637: horrible horace (horrible) * Tue, Jul 17, 2001 (05:31) * 1 lines
The above is a from an embargoed press note!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 197 of 637: Marcia (MarciaH) * Tue, Jul 17, 2001 (15:40) * 1 lines
Ah, nothing is more enticing than a bit of controvers. Embargoed by whom? I thought censorship was a thing of the past. Btw, Dear Liam, if you ever send me anything you wish to keep just between us please make note thereof. I honor such requests all the time. I must admit my curiosity is piqued! Can you tell me more either here or elsewhere (Of course you can; what you do know would put MI 5 to shame.) Now, I shall eat my monitor so it does not fall into the wrong hands. *CRUNCH*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 198 of 637: horrible horace (horrible) * Tue, Jul 17, 2001 (15:52) * 1 lines
Embargoed by the nice people who sometimes send me stuff..Blair,Bush andsome others in the Vatican and Sing-Sing
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 199 of 637: Marcia (MarciaH) * Tue, Jul 17, 2001 (19:49) * 1 lines
*laugh* I should know better than to ask your sources. I know you to be a man of great esteem. I trust everything you send to me - you have never given me erroneous information and I never expect that you will. Thanks, Liam! I shall not ask again! *Hugs* of gratitude!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 200 of 637: Marcia (MarciaH) * Wed, Jul 18, 2001 (15:50) * 33 lines
Liam brings a lady diamonds for breakfast. Nice touch!
Source: Arizona State University College Of Liberal Arts & Sciences (http://www.asu.edu/)
Date: Posted 7/18/2001
Earthquakes Reveal Diamonds' Origins
The seismic rumblings could provide key clues about where miners should look for diamonds, according to recent research. Matt Fouch, assistant professor of geological sciences at ASU, studies vibrations caused by earthquakes to visualize the earth at depths of hundreds of kilometers, where diamonds are formed. His maps of the earth below South Africa provide new information about Earth s structure in regions where many diamonds are found.
In the July 1, 2001 issue of Geophysical Research Letters, Fouch and his coauthors, David James, John VanDecar (both of the Department of Terrestrial Magnetism, Carnegie Institution of Washington), and Suzan van der Lee (of the Institute of Geophysics, Zürich, Switzerland), show that some of southern Africa s most profitable diamond mines are located near areas where the earth is exceptionally stable and cool up to 250 kilometers below the surface. The paper will be published in a special section of the journal, with seven other studies on geochemistry, composition, and rock dating of southern Africa.
Many diamonds come from regions, called cratons, that are some of the most geologically stable places in the world. Two cratons, the Kaapvaal and Zimbabwe cratons, covering an area roughly the size of the nation of South Africa, are the source of most of southern Africa's diamonds.
"The region we're studying in southern Africa is over 3 billion years old, and in some places it's even 3.6 billion years old," says Fouch. Geologists think diamonds develop up to several hundred kilometers deep within these ancient cratons and are then driven straight up to the surface.
Miners scout the best places to dig for gems by looking for diamonds that have made their way to the surface. Other techniques, such as drilling for samples deeper in the rock or studying anomalies in the gravitational or magnetic properties of the earth in the area, increase the chances of finding diamonds. But none of these approaches guarantee success. "If people knew exactly how it worked all the time, then we'd have a lot more diamond mines," Fouch jokes. "Nearly all diamonds come from cratons, but not all cratons contain diamonds. So the question is, why do some cratons produce diamonds and others don't? Another question is, why do some of those areas have diamonds that are commercially profitable, and others don't? Some regions have diamonds, but they're just too chewed up to be gem quality."
Fouch and his colleagues think they may have found part of the answer deep in the earth's mantle -- the layer of rock that extends several hundred kilometers beneath the crust. By imaging the earth at these depths, they looked at the very source of diamonds, rather than waiting for them to travel to the surface.
Fouch created three-dimensional images of deep layers of the earth by using an array of 82 seismometers, sensors that detect vibrations caused by earthquakes from all around the world. The seismometers, placed at roughly 100-kilometer intervals across South Africa, Zimbabwe and Botswana, recorded data from more than 200 earthquakes occurring over a two-year period, mainly from the Himalayan and Andean mountain ranges. They used seismic tomography, a technique very similar to CAT scans in medical imaging, to produce the images.
"As people, we never want earthquakes to happen, but as seismologists we know they are an inevitability. So our job is to use them in the most productive way possible," says Fouch. "Every time an earthquake happens, it's like shining a flashlight on a particular part of the earth. The seismic waves from each earthquake bounce off of different layers of the earth and illuminate different internal features."
The speed and angle of earthquake waves' motion depends on what kind of material they travel through. For example, the rippling caused by dropping a pebble in a bowl of water will move differently than in water containing ice cubes or in a bowl of jelly. By analyzing the timing and angle of the vibrations' spread past the seismometers, Fouch and coworkers mapped the physical properties of the earth below.
They found that the mantle directly below the most productive diamond mines looks distinctly different than in the surrounding areas. In diamond-producing areas, the mantle is "seismically fast," meaning that it propagates earthquake vibrations quickly because the mantle rock may be cooler or chemically different from the surrounding areas.
"There are a few distinct pockets of the faster seismic velocities," Fouch explains. "One of these regions is beneath the Kaapvaal craton in South Africa, and one -- a little more diffuse -- is beneath the Zimbabwe craton. ... Most of the gem-quality diamond mines in southern Africa lie very close to these regions." By looking for similarly cold, seismically fast parts of the mantle, diamond miners may be able to identify new promising areas for mining.
Industry collaborators in southern Africa are very interested in Fouch's research, and some even allowed the seismologists to install seismometers on their property.
"This is certainly a technique that could be used in conjunction with other methods to possibly determine whether a region might be more prone to having diamonds," Fouch says.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 201 of 637: John Tsatsaragos (tsatsvol) * Sun, Jul 22, 2001 (08:42) * 18 lines
REAL PRE-EARTHQUAKE PREDICTION PROCESS (VLP band)
Yesterday, an EQ happened in Greece (with Ml=4.5 or Ms=5) in a distance of about 130 Km from me. Here are the signals, and our process conclusion.
The signal starts on July 20/18:20 UTC. The signal ends on July 21/ 07:50 UTC. The EQ happened on July 21/12:48 UTC.
On the image below, with red line are measured values from the E-W and N-S dipoles. Without signal, measured values must be follows the yellow line (trend). We sign a random time, with a violet color upright line. After, we calculate for each graph, the potential difference between yellow and red line on the violet color line. So, we have the values of E-W and N-S components. With simple composition of these two components we take the resultant value and the angle from East.
Making the same for all values from the beginning to the end of the signal (with a computer program) it appears on the screen the polar diagram (below). The program plots a red line for each couple of values. So, red area indicates all calculated directions. Finally, the program calculates the mean value and plots the green arrow. This is the azimuth direction of the source of the signal.
Next, the program plots on a map (below), the mean direction (starts from Volos), with a green on and off line. The real epicenter appears as a red asterisk on this map.
I think that is successful.
John (HPSO)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 202 of 637: horrible horace (horrible) * Sun, Jul 22, 2001 (09:32) * 1 lines
Wonderful John,this is not my field but I am getting interested now!!Liam
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 203 of 637: John Tsatsaragos (tsatsvol) * Mon, Jul 23, 2001 (16:44) * 4 lines
Warning. Additional bad news.
Two new big (world) signals appears on my real time monitor!!!!!!!
Be safe all.
John (HPSO)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 204 of 637: Marcia (MarciaH) * Tue, Jul 24, 2001 (15:12) * 5 lines
TWO???? Oh John, this is most fascinating. It is like the last time you had knowledge of two big ones. I don't remember the first one, but the second one was in Peru and they are still getting aftershocks.
Liam, this work John is doing IS fascinating, and all I know about earthquakes I learned as I rode them out. This is abolutely spellbinding.
John, is the time frame for those two large quakes within 60 days?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 205 of 637: John Tsatsaragos (tsatsvol) * Tue, Jul 24, 2001 (18:25) * 4 lines
Oh Marcia,
Unfortunately they are totally 4 (take a look at the topic 26). Yes. The time is about two months.
John (HPSO)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 206 of 637: John Tsatsaragos (tsatsvol) * Tue, Jul 24, 2001 (18:48) * 24 lines
PRE-EARTHQUAKE 24 HOUR ELECTRIC OSCILLATION
(By John Tsatsaragos)
Theoretic approach
A few days before a high magnitude earthquake strikes, an alternating electric current appear in the ground; its oscillation period is approximately 24 hours. This is caused by the combination of immense pressure on the rims of the fault area that is going to be activated with the influence of the gravitational forces of the moon and the sun. These gravitational forces cause our well-known tides.
The gravitational forces also cause the production of piezoelectric forces on the earth’s upper crust.
During one full rotation of the earth around its axis, the resultant gravitational force changes from a major rate to a minor one.
So the piezoelectric rates fluctuate as the gravitational forces fluctuate, in an approximate period of 24 hours. This potential in a period of 24 hours present very little width since the pressure changes are relatively small.
But, along an active fault area, pressure rises dramatically the closer we get to the time of the earthquake’s occurrence. This pressure is extremely large and its peak rate takes place at the moment the earthquake strikes (rock failure).
The moon and sun gravitational forces also affect the fault area where great pressures have been recorded just before the earthquake. Under these circumstances, the piezoelectric voltage, which is caused by the moon and sun gravitational forces, rises dramatically, while the pressure around the rims of the fault rise. Therefore, the piezoelectric voltage produced in a period of 24 hours increases in width, together with an increase in pressure on the rims of the fault area.
As a result, after the earthquake’s occurrence, when the pressure on the rims of the fault area decreases, the width of the piezoelectric voltage decreases dramatically as well.
In this animation, yellow curve is the function of change piezoelectric voltage in connection with pressure. X-axis shows continue pressure increase on the rims of the fault area and its modulation by tidal forces. Y-axis shows the resultant change of the piezoelectric voltage.
Here is an animation of the time change of this piezoelectric voltage, within EQ preparation, the time of the main earthquake, and the restoration of the rates after the its occurrence. In use, my real recordings become just like this.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 207 of 637: John Tsatsaragos (tsatsvol) * Tue, Jul 24, 2001 (19:07) * 4 lines
I apologize. The second picture should be first and the first second.
I apologize again.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 208 of 637: Marcia (MarciaH) * Sat, Jul 28, 2001 (14:49) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 209 of 637: John Tsatsaragos (tsatsvol) * Wed, Aug 15, 2001 (13:16) * 83 lines
Writing by John Tsatsaragos
I think that for first time in the history of earth sciences, we can have a complete picture BEFORE AN IMPORTANT EQ, and also, we can to see the NATURAL PROCESS AT THE EPICENTRE AREA. It concerns the EQ of Skyros area in Aegean Sea, on 26 July 2001 with a magnitude of 6.4R. Pre-earthquake electrical signals of 24-hour oscillation, that were recorded in my station in Volos, describe the events, a few days before they happen. We will see all the development of that phenomenon, from the period of calm, the preparation of the EQ, the foreshocks, the main EQ, the last significant aftershock, and anew calm.
An other important fact, is the successful prediction of that EQ, so much as for the magnitude, as much as the time. Complete localisation of epicentre is not possible with only one station that we have in our disposal. Localized only the azimuth direction from the station of measurements to the epicentre.
THE EARTHQUAKE
Reported by USGS National Earthquake Information Center as
2001 07 26 00:21:36.9 39.054N 24.225E Depth: 10G km 6.0mb 6.6MS AEGEAN SEA
Mw 6.5 (GS), 6.5 (HRV), 6.4 (CSEM). Me 7.0 (GS). ML 5.9 (THE)
The event located by the National Observatory of Athens (Institute of Geodynamics) at the sea area North of Skyros island and in a 130 km distance NNE of Athens and in a 130 km distance of my station in Volos. It is important to note that the event was felt in a wide region about 200 km radius around the epicentre area sending many residents into the streets. Skyros island worst hit, but no injuries have been reported.
Approximately 90 houses, mostly old traditional dwellings in the capital of Skyros were damaged. Amongst them, the almost 1000 years old monastery of St George the Arab which is situated inside the castle was badly damaged. The biggest effect to the Skyros capital population was the cut off the spring, which supplies with water the area.
SHORT- TERM EQ PREDICTION STEP BY STEP
I present to you the graph (the green curve below) of my total signal of the 24-hour oscillation, from July 1 up to August 7, i.e. 12 days after this EQ.
From July 1 up to July 15, it is period of calm.
Next interval up to July 20, appears the beginning of final stage before the main EQ. Localised by the signals, at periods, the azimuth direction of Skyros island.
Follows the period of events up to August 4, and afterwards the period of calm.
Before the main EQ, happened two foreshocks in the same area. The first, on July 21 (M=4.8Ms), and the second on July 25 (M=4.2 Ms). The fact that this EQ was foreshock, appearred to me the next day July 22.
Green curve in the graph, appears that the amplitude of 24-hour oscillation increases dramatically, afterwards July 21. This means that this EQ was not the main.
Thus, we expected the main EQ in the same area i.e. the area of SKYROS island, in a few days.
Watching this graph on July 23, we can say that a big EQ incomes in a few days. Magnitude of this EQ must be higher than 5.7R because the amplitude of 24-hour oscillation is higher now, compared to previous recordings, and because the higher EQ magnitude for these was 5.7R.
Here is one animation graphic, that show the azimuth direction changes, which are calculated during pre-earthquake electrical signals (by VLP and 24-hour period), until the main EQ.
Thus, we know that a big EQ incomes in a few days, approximately in Skyros area (because the foreshock and the calculated azimuth direction that still the same), but WHEN?
Watching the graph of mean daily tidal gravity forces for this area (below), we find that the next high danger days, are July 25 plus or minus one day i.e. FROM JULY 24 TO JULY 26. Actually, it happens in the first 37 minutes on July 26, with a magnitude of 6.4R. (Always, I use UTC time).
This graph come from one scientific prediction computer program of tidal gravity forces. With red arrows appeared high danger dates for the month. They are located at upper or lower picks of the curve. We found that a percentage of about 75%- 80% of the significant EQ's in Greece, happened on these days, plus or minus one day.
ATTENTION: This graph means nothing without signals
Was the main, this big earthquake? YES, because the signal decreased its amplitude the next days.
On July 30, became a strong aftershock of 5.4R. This aftershock, was also predicted, because one day before, appears an increase of signal. This is aftershock, because the signal decreased to normal level after this EQ. (See the signal graph above).
AUTHENTIC PREDICTION
From July 21 to July 27, my co-operator Dr. C. Thanassoulas, was in a seminar in Academy of Sciences in Sofia - Bulgaria. After his lecture on July 23, and for practical implementation, he gives forth that in July 25, plus or minus one day, will become in Greece an EQ with a magnitude of about 6.1R. This information is included, in the authentic proceedings of this seminar. The EQ is affirmed during the works of this seminar.
NATURAL PROCESS
AT THE EPICENTRE AREA
It is already known that, continuous movement of lithosphere tectonic plates, produces pressures in the rims of the fault. When the value of those pressures exceeds some limit, piezoelectric phenomenon becomes observable. In the theoretical animation graph, that follows, appears the curve of piezoelectric voltage, in connection with the pressure (yellow curve).
Tidal gravity forces fluctuate that pressure, in the rhythm of oscillation with period of 24 hours. Thus, piezoelectric voltage should vary as it appears in Y-axis.
Let us to watch again the signal graph of real measurements, but now with the curve of medium signal values (blue curve). This is the form of piezoelectric voltage, from the tectonic plates continual movement, on the fault rims of Skyros area, during this period.
You can see the period of calm (July 1 to July 14) and the gradual increase of the piezoelectric voltage, as the pressure increase respectively, a few days before the fracture of rocks i.e. a few days before the main EQ on July 26.
Immediately after the big EQ, curve of piezoelectric voltage it falls abruptly, in values which it had before begun phenomenon. Increase again before last aftershock, and falls again to calm values. It shows clearly that the pressure in the fault area, was decreased abruptly, immediately afterwards the 6.4R EQ. Thus, we infer that this EQ was the main and it does not exist danger for a new big EQ.
Blue line in last graph, is not nothing more from a successful (perhaps it is the best) confirmation of theory for the genesis of the earthquakes, from the continuous movement and conflict of lithospheric plates.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 210 of 637: Marcia (MarciaH) * Wed, Aug 15, 2001 (15:31) * 1 lines
This is splendid, John. You might as well tell the good people reading this of your subsequent fame due to the accuracy of this work you have done. Reading the above, I can remember how exciting it was experiencing the events and proving your theories. My gratitude for posting this is very great. And, thank you for explaining it so well that even I can understand it. Your presentation is not only easy to understand, your graphics are splendid. My admiration for your work grows daily.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 211 of 637: Marcia (MarciaH) * Thu, Aug 23, 2001 (00:33) * 3 lines
John, you are on much different substrate than I am - how small can the quakes be and you still feel them? On this island we cannot feel them under 4.0 usually (and never for me.) In Southern California I could be shaken out of sleep and still correctly estimate a 4.5 earthquake - my first and only non- Hawaiian earthquake.
We have heard how insensitive Rob is to earthquakes... I wonder what his threshold is for feeling them.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 212 of 637: John Tsatsaragos (tsatsvol) * Sun, Sep 9, 2001 (13:15) * 6 lines
Hi,
I have an idea. Perhaps we can do something sensible and useful in GEO. Idea is to we make a table with all pre-earthquake phenomena (precursors) that perhaps we have observed. We will discuss each one observation, in order to we find the explanation. Also, you can call your friends to tell us their experience. If they are not members, they can send their experiences by e-mail. As much friends will participate, so much more good it will be the result. This table will be visible to all. I wanted your opinion.
Marcia, your opinion first.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 213 of 637: Paul Terry Walhus (terry) * Sun, Sep 9, 2001 (13:26) * 24 lines
1 million jumpers fail to set off quake
EXPERIMENT USES
CHILDREN TO TEST
SCIENTIFIC THEORY
LONDON (AP) -- What is the impact of a million people jumping?
Not a lot, scientists found.
Seismologists said Saturday that an experiment in which more than 1
million children jumped up and down simultaneously in the hope of
triggering an earthquake had produced scarcely a tremor.
...
Early reports indicated the jump had left ``measurable traces'' on
seismometers at the jump sites, organizers said, while the British
Geological Survey was investigating a ``small trace'' in Cornwall.
Organizers said it would take two weeks to monitor all the data.
``The Giant Jump did not cause an earthquake,'' said a statement
posted on the experiment's Web site (www.scienceyear.com). ``So we can
sleep well at night knowing that, contrary to the popular myth, even if
everyone in China jumps up and down at the same time we won't get
swept away by a tidal wave.''
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 214 of 637: Marcia (MarciaH) * Sun, Sep 9, 2001 (18:56) * 3 lines
(Thanks, Terry. I also posted it in Geo 26)
John, My Dear, what a splendid idea for GEO. Now, how do we do this? I will ask my son and his future wife to send their observations even if I have to post them myself. Thinking back, I cannot remember anything which was out of the ordinary with the earthquakes I have experienced. Please, let us do this. You have observed much! I can always tell when it is going to rain. The ants come into the house and the spiders move their web-building activities to under the house eaves.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 215 of 637: Marcia (MarciaH) * Sun, Sep 9, 2001 (19:50) * 4 lines
Tables require special programming. Is is possible here (of course it is if only I knew how - time to do more studying!) Did you wish to continue posting an updated table each time something is added, or do you think it is possible to post a table on the front page of GEO?! I would love to have immediately accessable data on both earthquakes and volcanoes.
Perhaps I create a new topic also for satellite hunting and experiences. My son has sent many photos of his successes, and on his camping trip over last weekend, he identified and logged 15 different satellites. He has even gotten iridium flares. I definitely need a new topic. John, do you think your observation and table data need a new topic, too? I am most excited to do this!
*HUGS* for thinking of this!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 216 of 637: Marcia (MarciaH) * Sun, Sep 9, 2001 (22:12) * 7 lines
John's scales after Richter and Mercalli:
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 217 of 637: John Tsatsaragos (tsatsvol) * Mon, Sep 10, 2001 (20:58) * 33 lines
I wrote this table, In order to help remember us some EQ precursory phenomena. It comprises some phenomena that they have observed in several cases and they are reported in bibliography.
We wanted any experience or any possible explanation, scientific or not.
1. Foreshocks.
2. Changes in the velocity of P seismic waves.
3. Emissions of radon gas.
4. Level changes in the underground water.
5. Temperature changes in the underground water.
6. Appearance of new water springs or disappearance of existing water springs.
7. Underground low frequency noises.
8. Appearance of crevices in the ground.
9. Elevations or subsidences of ground.
10. Curious behavior of domestic or wild animals.
11. Disappearance of draught faculty of some magnet.
12. Electric currents in the ground.
13. Changes in the earth’s electric field.
14. Changes in the electric conductance of the ground.
15. Changes in the earth’s magnetic field.
16. Changes in the earth’s gravity field.
17. Abrupt and big changes in sea level.
18. Headaches or cardiac arrhythmias in persons.
19. Nervy action in persons.
20. Parasitic noises in radio-emissions.
21. Coloration of horizon before sunrise or after sunset.
22. Mantam’s Pele face.
23. Extraordinary hot weather.
24. Extraordinary ionosphere changes.
25. Extraordinary air moisture.
26. Changes in the air ionization.
Tell to us your experience or that you have heard even if it is not included in the table above. Please tell to your friends for this attempt. You are welcome.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 218 of 637: Marcia (MarciaH) * Mon, Sep 10, 2001 (21:38) * 3 lines
I know that for certain that my son did radon gas testing for the Hawaii Volcanoes Observatory. There were many "wells" with round recording graphs in them that he had to collect and log. Guess who got to go along. This list is great, John. But what sort of equipment do we need to sense these changes? Not the usual household kitchen equipment, I think. When I have seen Madame Pele's face it has always been in the fume cloud over an actively erupting crater.
There is also eruption weather here, and times when the lighting is different from ususal that is "Alii weather" which mean a great life is ending. I will gather more information as to local traditions and portents to add to your comments. This is fascinating! Many warm *Hugs* for doing all this work and posting it here.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 219 of 637: Marcia (MarciaH) * Mon, Sep 10, 2001 (21:42) * 1 lines
Thinking about your list, I wonder if you are talking about BEFORE earthquakes hit or AFTER. I have seen many earth cracks, strange lights, sensed changes in the atmosphere and strange tingling sensations, but they were all after the earthquake had occurred.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 220 of 637: Marcia (MarciaH) * Mon, Sep 10, 2001 (23:49) * 3 lines
I know better. It is precursors and I shall ask both my son and my ex, as well as others in Hawaii I know if they have sensed anything out of the ordinary before an earthquake. My quakes have been so memorable that I do not think of before; I am concentrating on the quake and how different waves feel as it plays out its strenght bouncing me around like a little toy in a giant's hands.
How can I remember every moment before things happen? Perhaps normal for Hawaii is an active ionization field and extraneous sounds on radio and all those other things, because we are so near an active volcano that it is continuosly making little adjustments. After many years, it has become routine for us and "normal."
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 221 of 637: John Tsatsaragos (tsatsvol) * Tue, Sep 11, 2001 (00:28) * 6 lines
Definitely the above table is referred to phenomena BEFORE THE EQ. If you read more carefully, I wrote “EQ PRECURSORY PHENOMENA”. Anyhow, it exists corresponding phenomena that come before volcano eruptions. I have not any experience with volcanoes but you must have observed enough strange changes. We must make another corresponding table for volcanoes.
The EQ but also volcano explosions, is prepared for many years before. During this preparing stage, it changes slowly the environment around us, and we can observe it. We need scientific instruments in order to observe some of these phenomena. It is enough our perceptiveness to observe the rests. Unfortunately, by our nature we cannot observe very slow changes (or very fast). With a few luck you can observe a precursory phenomenon from the window of your kitchen or inside your kitchen, or in your garden.
Experience of your son must be very interesting. It appears that your help to your son was very important and enough dangerous Marcia. Finally, you have special abilities and many scientific experiences. I am sure that you have observed strange phenomena before some EQ and before an eruption of your volcano.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 222 of 637: Marcia (MarciaH) * Tue, Sep 11, 2001 (13:14) * 1 lines
Happily, John, every square cm of our active volcanoes are monitored closely. We have what they call harmonic tremors which are the equivalent of labor pains prior to each volcanic eruption. By the intensity and frequency of these tremors they can predict the area and keep us out until the outbreak of lava happens.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 223 of 637: Marcia (MarciaH) * Tue, Sep 11, 2001 (13:21) * 1 lines
Yes, we need a volcanic eruption list as well. Despite not feeling the earthquake we had (4.9R) I am sure there were some precursors.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 224 of 637: John Tsatsaragos (tsatsvol) * Wed, Sep 12, 2001 (04:59) * 7 lines
How many times they had send you a caution before an eruption? Works trustworthily this system?
I notice that in some case, earth activity is insectifuge medium, especially on the ground of the garden or… in the kitchen. You can observe your cat also. She wants to go out of the house with mania. This can happen about a half an hour before the event. Maybe you have a sweet cat and perhaps she is more useful than that you imagine.
Also, this is a good start point to begin write the precursors in your table for volcano activity.
4.9R can be a foreshock or not. You need more information to say something. In any case be careful!
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 225 of 637: Marcia (MarciaH) * Wed, Sep 12, 2001 (18:11) * 8 lines
In Hawaii, I have never been warned of an impending earthquake. Neither have I heard of anyone else doing so, unless it was you, John! Unhappily I have many insects to watch. They come automatically with living in the tropics. My cat is an outdoor cat. She dislikes being inside houses and it makes me less allergic to her. She has lately taken to coming to the window beside my chair and talking to me. She seems a little distressed until I talk back to her. I will see if this means anything special, other than she misses me and wants me to pay with her.
The 4.9 earthquake was part of an earthquake swarm on Loihi which remains beneath the sea. This is the report posted by HVO:
0535 September 12, 2001
The earthquake swarm at Lo`ihi ended yesterday morning. Though the earthquakes were large, with several in magnitude range of 3.5 -4.9, the swarm was but a shadow of the one in July 1996. We don't know if there was an eruption or a summit collapse on Lo`ihi accompanying the latest swarm.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 226 of 637: Marcia (MarciaH) * Sun, Sep 30, 2001 (23:11) * 37 lines
Finally an article about John which is in English. Poorly edited and names spelled wrong, but it IS in English, and for that I am grateful.
PROFESSOR OF GEOPHYSICS CLAIMS TO HAVE PREDICTED THE EARTHQUAKE
http://zeus.hri.org/news/greek/mpab/2001/01-07-29.mpab.html
Athens, 29 July 2001 (21:05 UTC+2)
Research according to which he expected an earthquake of 5.7 R to occur in
Greece two days later, when it actually did, was submitted on the 23rd of July
in a seminar in Bulgaria by Geophysics Professor Konstantinos Thanasoulas.
Mr. Thanasoulas has been researching the prediction of earthquakes since
1982, but only just last year did he manage to get any results, after his
cooperation with Giannis Tsaragos, electronic engineer.
As he stated to a local television channel, STAR , before the earthquake there is
a deformation in certain rock formations, which creates an electrical field and by
applying simple mathematics one can find the source of this electrical field.
Mr. Tsatsaragos pointed out in statements to the same channel, that in a length
of time under 15 days from when the widening of the electrical field begins an
earthquake is expected.
The two scientists' station showed indications of an upcoming earthquake from
July 20th up until 20 minutes before the earthquake took place in Skyros.
The scientists point out that they can predict the intensity and time of the
earthquake, but not the exact epicenter because they only have one station at
their disposal.
After the verification of their prediction the Bulgarians showed interest in Mr.
Athanasoula's method. The interest was not shared by the Ministry of the
Environment Physical Planning and Public Works or by the Organization
Antiseismic Protection, who were informed about the research and its results.
In any case, in scientific research that took place in 1993 in the seismological
lab of the University of Athens, the epicenter and the intensity of the earthquake
in Skyros had been predicted, but the exact date had not.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 227 of 637: Marcia (MarciaH) * Sun, Sep 30, 2001 (23:35) * 3 lines
John, they could have at least spelled your name right. The above was from a Macedonian newspaper, and I am grateful for their creating the article I could only see in Greek previously. And Dr. Thanassoulas' name they also could have spelled correctly...
I think I might just edit it and repost it in better form...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 228 of 637: John Tsatsaragos (tsatsvol) * Mon, Oct 1, 2001 (14:10) * 7 lines
Thank you Marcia,
I did not know that the this article exists. It appears that this is translation from the reports in Greek TV and it is easy to translate wrong our names. I remind you how we can prove that we made that prediction.
From July 21 to July 27, my co-operator Dr. C. Thanassoulas, was in a seminar in Academy of Sciences in Sofia - Bulgaria. After his lecture on July 23, and for practical implementation, he gave forth that in July 25, plus or minus one day, will become in Greece an EQ with a magnitude of about 6.1R. This information is included, in the authentic proceedings of this seminar. The EQ is affirmed during the works of this seminar. I remind you that the EQ happened in July 26th at 00:20 UTC. You can read a small photo-copy of the authentic proceedings of this seminar below.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 229 of 637: Marcia (MarciaH) * Mon, Oct 1, 2001 (21:11) * 7 lines
You are too charitable, John. They spelled you name once correctly and then incorrectly. The same with Dr Thanassoulas. For the paper complete with references and graphs (use Netscape - you have to download a file which resists my computer if you use Internet Explorer)
http://users.otenet.gr/~thandin/tidalreport/tidalweb.htm
There are fascinating links on Dr Thanassoulas' home page, and if you wish to argue with him about this whole system, there is a place for that as well. YOu can even see where the large earthquakes in Greece are
http://users.otenet.gr/~thandin/
Perhpas I am a bit partial, but I like John's discussion of his proven method of detecting future earthquakes. Scroll back to see his post complete with his graphs, or http://users.otenet.gr/~bm-ohexwb/ then you can read it in both English and in Greek if you are as skilled as the gentleman who created the page is.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 230 of 637: John Tsatsaragos (tsatsvol) * Tue, Oct 2, 2001 (04:17) * 7 lines
Hi,
I wanted to explain that the earth react slowly in rhythms that are difficult to sense a person. We trade on tidal forces, which modulate more slow phenomena. It is easier to me to receive electrical variations or to translate other type of energy signals to electrical forms. It appears that Nature translate underground pressure variations into electrical signals that they are measurable. As we measure lower frequency variations, background noise is reduced. We need a signal to noise ratio equal or better than 10 in order to make creditable measurements. We work with Ultra Low Frequencies, or signals with Ultra Large Time Period. Our signals are with periods of 24 hours and larger.
Larger period signals are modulated with 24-hour period signals that are produced from the combination of tidal forces with the earth’s rotation. We record those signals and as we believe until now, they are a window with a very good view at the last stage of the EQ preparing process. The EQ (6.4 M) in Greek Skyros Island on July 26th, is a good example as you can see in my complete description in responses 201 and 209.
I will rejoice to answer in your questions.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 231 of 637: a (awia) * Tue, Oct 2, 2001 (06:02) * 1 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 232 of 637: aiwa (awia) * Tue, Oct 2, 2001 (06:05) * 3 lines
JUS BLIAT SUPISTI IDIOTAI, NACHUI JUS. BLIAT IESKOJAU MAZDOS O CIA KOKIE TAI SEISMOLOGAI APIE GAMTA KALBA. EI PADEKIT OLOCHAI MAN RAST MX6 KONFERENCIJA.
SO I'LL EXPLAIN IN ENGLISH. I'M VERY SAD CAUSE I COULDN'T FIND MY CONFERENSION. HELP ME PLEASE. WRITE SOMEBODY ABOUT MX6 CONFERENCE.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 233 of 637: Paul Terry Walhus (terry) * Tue, Oct 2, 2001 (08:47) * 1 lines
mx6 conference? Help, Marci.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 234 of 637: Marcia (MarciaH) * Tue, Oct 2, 2001 (15:24) * 4 lines
MX6 Conference - please check http://www.google.com/search?q=mx6+conference
There are several listed.
John, I suspect if an earthquake can be sensed by a human, then it is too late and it is already occurring. We are a fairly insensitive lot caompared to other animals!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 235 of 637: John Tsatsaragos (tsatsvol) * Thu, Oct 4, 2001 (11:39) * 6 lines
Hi Marcia and Terry,
If an earthquake can be observable, it must remind to us that exist at least this power, which can destroy our extravagant arrogance in a few seconds.
We are so fairly insensitive and stand-offish genus, where we feel safety, even if we live on a bomb. We entrust our faceless high technology and we easily believe indefinite scientific notices. This happens because we easily believe that we hope.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 236 of 637: Marcia (MarciaH) * Thu, Oct 4, 2001 (16:32) * 1 lines
*SIGH* I think after what happened on 11 September of this year, we are more aware of how easily our world can be changed and demolished. Things once assumed to be secure are no longer. "Solid as a rock" is only an aphorism. And we are very small on this most powerful earth. We are guests who do not respect the owners well. Believing what we wish were true is living in a fantasy!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 237 of 637: Alice (MysteryMan) * Thu, Oct 4, 2001 (16:56) * 1 lines
We are bad stewards.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 238 of 637: Marcia (MarciaH) * Thu, Oct 4, 2001 (17:10) * 1 lines
Alas, true! The cockraches and ants will in herit what great things we erect to our own honor. Give me a mountain to anything man-made. I have 5 volcanoes under me! Happiness is exploring the wonders of the universe before anyone dropped their trash there.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 239 of 637: John Tsatsaragos (tsatsvol) * Fri, Oct 5, 2001 (13:37) * 7 lines
Hi Alice and Marcia
We must be not stewards in this case. We must be on the qui vive and always ready, Alice. We cannot to administrate the EQ’s or volcano eruptions yet. It is better to predict them and to organize our protection.
On your 5 volcanoes were lived many peoples before you, Marcia. The difference with you is that you know more things about their life than your ancestors. Yes, your volcanoes are too strong but we must use our knowledge and logic to protect us from their anger.
Did you know more than one who works in this object without payment or with hope for payment? Where is our intelligence?
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 240 of 637: Marcia (MarciaH) * Fri, Oct 5, 2001 (15:15) * 3 lines
John Dear, your altruism and truth shine like pure gold in the sunlight. Only you and my son worked on these mental exercises without pay. If my tagging along to learn and assist counts, you can make that number 3. You, above and beyond all are to be lauded since you work on what will save lives eventually. Our Intelligence, if it can be called that, is out pursuing the material world with little plastic cards and deeply in debt as a result. I am an old-fashioned sort. I have no debts and hope to die that way far in the future.
You need a second monitoring station. How close to the first one does it need to be? I want you to have better data and more complete information to use in your brilliant studies.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 241 of 637: John Tsatsaragos (tsatsvol) * Sun, Nov 11, 2001 (05:27) * 25 lines
CAN YOU PREDICT THE NEXT BIG EQ IN GREECE?
Come and make the inquiry with us.
From now on, you will be able to see the graph of the recent signals here. They are recorded in my station at Volos. This graph, titled RECENT 24-HOUR SIGNALS, will be updated almost every day. Thus, each time you will see this response, you will see the updated graph. (The dates appear on the horizontal axis).
In order to understand what exactly you see, I give you first the 40-day graph, which shows the corresponding signals for the big EQ in Skyros Island area in the Aegean Sea (M=6.4R), on 26th July 2001, at a distance 130 Km from my station.
PRE-EARTHQUAKE 24-HOUR SIGNALS OF SKYROS EQ
Note: the importance is the amplitude of the oscillation (yellow line). When the amplitude rises, an EQ is expected. The greater the amplitude, the greater the magnitude of the expected EQ.
RECENT 24-HOUR SIGNALS
The two graphs above have exact the same scale. I will answer any additional questions or give further explanations you may need.
I invite you to predict the next big EQ in Greece with us, a few days before it happens.
(When it is to occur)
John Tsatsaragos
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 242 of 637: John Tsatsaragos (tsatsvol) * Sun, Nov 11, 2001 (05:46) * 3 lines
Thank you Terry and Marcia for your great help.
Regards
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 243 of 637: Marcia (MarciaH) * Sun, Nov 11, 2001 (14:11) * 1 lines
This is most exciting, John. Imagine being able to predict the earthquake and prepare for its eventuality. I am delighted you have posted this here. Now we can all put on your wizard's hat and see into the future from your detected earth signals. We understand so little of the earth on which we live. Perhaps this allow us to see a little more of the dynamic nature of the crust on which we live.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 244 of 637: Marcia (MarciaH) * Sun, Nov 11, 2001 (14:13) * 3 lines
Will your signal graph update or will you post new ones each day? If we must look at the one you posted on Geo 9.241 I should bookmark it for easy access.
Many thanks, Terry and most expecially to John for enabling us to watch the signals change with you. *Special hugs* of appreciation.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 245 of 637: Marcia (MarciaH) * Sun, Nov 11, 2001 (21:53) * 1 lines
http://tvnight.org/yapp-bin/restricted/read/Geo/9.241 is updated. Bookmark it lest it get buried in future posts.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 246 of 637: Rob Glennie (AotearoaKiwi) * Mon, Nov 12, 2001 (03:35) * 5 lines
Hi all
Great work John, I am impressed by the amplitude chart. Based on the size of the yellow line movement, how easy is it to estimate the size of events, once they have occurred? Presumably earthquake patterns will vary and that there will not always be a build up in the signal variation?
Rob
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 247 of 637: John Tsatsaragos (tsatsvol) * Mon, Nov 12, 2001 (12:50) * 10 lines
Hi Rob,
Yellow lines in my graphs are the recorded electric signals that have period roughly 24 hours anyhow. We wait changes only in the amplitude of the 24-hour oscillation. This amplitude is connected directly with the bigness of the pressure between the sides of the fault, as also I have explained already, but also with the size of the imminent EQ. Signal with bigger amplitude means bigger size of EQ.
.
You see already big amplitude signals that preceded the EQ of Skyros, enough small amplitude before and afterwards this EQ and also in the recent signals. It means that do not exists now such big pressure in the faults around my station that can cause powerful EQ.
If and when we realise increasing amplitude in the signals then, we can calculate the azimuth direction of the signal source with simple physics. Usually, the EQ becomes during the next few days. Then we can determine the more dangerous days as already I have described for the EQ of Skyros.
I will inform you here, just as we see any considerable development that you can realise, visiting the response 241, and looking the graph of the recent signals.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 248 of 637: Marcia (MarciaH) * Mon, Nov 12, 2001 (14:50) * 1 lines
This is my first experience in labor pains not involving me. As surely as mine preceded my son's birth, John's signals tell of earthquakes to come. I find this not only fascinating, but also exciting. It is as though we were privy to some great cosmic secret. I have done this before with John. You will not be disappointed!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 249 of 637: Curious Wolfie (wolf) * Mon, Nov 12, 2001 (17:56) * 1 lines
i don't know what the charts mean (the little oscillating lines and amplitude) but i've bookmarked the graph too!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 250 of 637: Marcia (MarciaH) * Mon, Nov 12, 2001 (22:09) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 251 of 637: Marcia (MarciaH) * Mon, Nov 12, 2001 (22:24) * 3 lines
John has promised to explain. Perhaps it might be good to explain it when you see a sudden surge in the height of the signals.
Take note of that. An earthquake will surely follow for John.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 252 of 637: John Tsatsaragos (tsatsvol) * Tue, Nov 13, 2001 (04:57) * 7 lines
You see the result of twenty years work in response 241. I expended a lot of money and effort on my research as you can imagine. I was disappointed many times during my attempt. I believe too, that now you will not be disappointed.
I have to thanks Marcia for she's trust and help. She is the first hostess that has a live research in the web now.
(Maybe Felix above makes a research too).
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 253 of 637: Marcia (MarciaH) * Tue, Nov 13, 2001 (13:48) * 5 lines
Felix is adorable, and resembles what you experienced as you worked out the problems of your seismic detecting station. It looks relativly simple to the uninitiated, but YOU had to invent it, first. Then you had to find a way to record the signals. Then you had to have professional recognition - perhaps the most difficult part of the entire enterprise. I merely recognized your brilliance when I saw it. Your willingness to share it with me is one of the greatest delights in my life.
I have had second thoughts about keeping the update on post 241. It will become so deeply buried in posts that it will take much time to download each day. I can repost it here each day that you update it, or we can post it on the front page... We definitly need to talk about this when you have time to do so.
Please consider posting each one separately. Each on the day they are created by you. That way we will have a complete collection to refer to when the singals change. Or, perhaps you have a better way of posting this most valuale data. I can create a topic just for your seismic data - or you can. In any case, I am so happy to have you here, and you honor our humble conference with your presence.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 254 of 637: Curious Wolfie (wolf) * Tue, Nov 13, 2001 (18:27) * 2 lines
can we have a separate topic just for the signal map? should we include all our updating maps or maybe just the updating earthquake maps in one topic?
thanks, john, for entrusting us with your invention. i think it's amazing what one can think up!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 255 of 637: Marcia (MarciaH) * Tue, Nov 13, 2001 (19:08) * 5 lines
I will speak to John as soon as the earth rotates into daytime for Greece and he is awake enough to think. In my humble opinion, John's graphs updates deserve their own special page. Updating maps take too long to load when put all on the same topic. I tried it and gave up on topic 44. I have left it with 4 maps because it was the easiest way to access aurora maps. I also think that we need to watch his data unveil for a while before we can tell what is "normal" and what might signal an imminent earthquake. John has worked hard to get his equipment as refined as it is. He has also learned how to interpret what signals he receives. I will trust him to guide us.
My joy in having his research on Geo is greater than my ability to express it.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 256 of 637: Curious Wolfie (wolf) * Tue, Nov 13, 2001 (20:01) * 1 lines
me too, and i'm happy to see him here in my twin's conference!! *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 257 of 637: Marcia (MarciaH) * Tue, Nov 13, 2001 (20:53) * 4 lines
*grin*
John has updated his graph for today!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 258 of 637: Marcia (MarciaH) * Wed, Nov 14, 2001 (20:10) * 1 lines
There was an earthquake in Athens early today (Hawaiian time). I am most anxious to hear from John, and to see the signal update.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 259 of 637: Curious Wolfie (wolf) * Wed, Nov 14, 2001 (20:19) * 1 lines
oh yes, didn't notice anything yesterday on his chart but....i don't know what to look for but i sure hope john is ok!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 260 of 637: Marcia (MarciaH) * Wed, Nov 14, 2001 (23:01) * 3 lines
John has magnified the part of his graph which shows the earthquakes from yesterday. He is well, thanks. I worried, too. He also assures you, Wolfie, that you are safe for now in Los Angeles. (That "for now" part is a little disconcerting, but he cannot control the forces of nature.)
I wonder when we will hear of the damage the great quake in China caused. They are experiencing many strong aftershocks, too. That really IS frightening!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 261 of 637: Marcia (MarciaH) * Wed, Nov 14, 2001 (23:18) * 4 lines
John's Athens quake graph amplified from his post 241. Note the increasing amplitude. Also note that the usual way for signals to appear is larger just before the quake happens. This has been noted in other detected quake signals.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 262 of 637: Marcia (MarciaH) * Wed, Nov 14, 2001 (23:32) * 1 lines
Also note how low the bottom of the wave signal dips before the quake. There is much to see in those little signals from the earth as it squeezes out its electrical impulses. It reminds me of someone preparing for a great jump. To gather momentum, they swing backward first. This is probably incorrect in electrical signals, but it happens each time!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 263 of 637: John Tsatsaragos (tsatsvol) * Thu, Nov 15, 2001 (20:57) * 6 lines
Thank you Marcia for posting,
When yellow line goes up it means that the pressure between the sides of the fault increases and when the yellow line goes down, pressure is decreased. As long as more up go the line (and it returns down as well), so much bigger is the pressure and so much more powerful is the expected EQ. The up down of the pressure is caused by the tidal forces and produces electrical signals by the piezoelectric phenomenon. I remind you that an EQ become when the pressure is so high so that it breaks the rocks.
In the graph of my signals above, you can see the time moment of the EQ in Athens. But the analysis of the individual signals (N-S & E-W) showed that the main source of signals is not in the direction of Athens but EES from my station. This means that does not exist danger to the direction of Athens but exists increasing pressure in some fault to EES direction. Comparing recent signals with them of Skyros EQ, we see that still does not appear danger for some big EQ. In any case we will see the next days.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 264 of 637: Marcia (MarciaH) * Thu, Nov 15, 2001 (23:04) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 265 of 637: John Tsatsaragos (tsatsvol) * Fri, Nov 16, 2001 (04:51) * 4 lines
Indeed, we do not have always the results that we're waiting during an inquire. If it was like this, we will had not object for inquire. In each case we will follow the nuture’s game together. But we must search the WHY in each case. This is a way to learn and the beauty of inquires.
Hollow sound, that accompanies most EQ’s, (not from the materials that are destroyed or fall around us) it is indeed nightmare. I have lived two big EQ’s with strong hollow sound and enough smaller.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 266 of 637: Marcia (MarciaH) * Fri, Nov 16, 2001 (17:41) * 3 lines
We will learn together, John! I think we need much data for careful study and comparison. Only in this way can we see both the similarities and the differences. Then, we must sort out what is not relevant. I am patient. I am also a careful observer and an inveterate note-taker. I will join you in this most worthy research. I have much more to learn that you alredy know, but I am more than willing! I hope you need an assistant.
The sounds you heard must have been blood-chlling. Our rock is not nearly as dense as your hard metamorphic rock of marble and quartz. I can only imagine how truely awesome (the true use of the word) it is. Even your smaller quakes had these sounds?! We not only have gentle volcano eruptions in Hawaii, as also have gentle earthquakes, it would seem. Thank Goodness!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 267 of 637: Curious Wolfie (wolf) * Fri, Nov 16, 2001 (20:27) * 3 lines
i think i would've remembered a sound like that. can't say that i've heard one and hope i don't have to experience a major earthquake either. thank you for your explanation on the lines and stuff on your chart, john *HUGS* glad to know you're safe!
*HUGS* marcia!!!!!!!!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 268 of 637: John Tsatsaragos (tsatsvol) * Sat, Nov 17, 2001 (14:38) * 6 lines
The EQ sounds separately of the EQ it is not something so impressive. But if you hear them suddenly with a strong gambol it becomes very awesome. I felt a medium aftershock of our 6.3R in the year 1980 walking in a forest. I will never forget the trees coming up and down to the horizontal position, in parallel with ground surface, under heavy strong sounds. I was feeling that the trees would fight me....
But life has its counter faces. Forget my nightmare experience and continue in Geo. But first PUT ON your computer sound and then Click Here
(I hope that it works).
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 269 of 637: Marcia (MarciaH) * Sat, Nov 17, 2001 (16:16) * 1 lines
It works, John! Shall we dance? (Some how I expected something more Greek than Latin.) I want to know more about your nightmare experiences. Perhaps not here, but I am fascinated. My three strongest quakes involved incredible luck on my part in not getting hurt or getting killed. You don't want to know about that, either.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 270 of 637: Curious Wolfie (wolf) * Sat, Nov 17, 2001 (21:19) * 1 lines
wow, that is great!! now where's that long stemmed rose!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 271 of 637: Cheryl (CherylB) * Sun, Nov 18, 2001 (15:40) * 1 lines
Just checking in here on Geo. I'm glad to hear that John is all right.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 272 of 637: John Tsatsaragos (tsatsvol) * Sun, Nov 18, 2001 (20:49) * 4 lines
Hi all
It is better to forget our nightmares. I believed that it would was better for you and for your friends to send this Latin music. OK. Something Greek now. I hope that you like it. ZORBA!
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 273 of 637: John Tsatsaragos (tsatsvol) * Mon, Nov 19, 2001 (04:28) * 6 lines
Hi Cheryl and all
You can follow my real research and monitor the last 40 days pre-earthquake activity in Greece by visiting in response 241 or
CLICK HERE.
(The graph for the recent pre-earthquake signals is updated every day!)
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 274 of 637: Curious Wolfie (wolf) * Mon, Nov 19, 2001 (19:07) * 1 lines
thanks for the Zorba! it sounds familiar!!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 275 of 637: Cheryl (CherylB) * Mon, Nov 19, 2001 (19:20) * 1 lines
Thanks for the links, John, both to your research graphs and for the "Zorba" music.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 276 of 637: Curious Wolfie (wolf) * Mon, Nov 19, 2001 (22:29) * 1 lines
where's my twin??? *howling your name at the moon, marcia!*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 277 of 637: Marcia (MarciaH) * Tue, Nov 20, 2001 (12:41) * 5 lines
*Howling Back to you Like a Lost Soul*
John, Wolfie, Cheryl, Big Hugs for tending Geo while my phone connection was killed at the pole. New pole took two days to erect and hook up again. Unhappily, they did it without warning, so I could tell none of you. I knew you would worry just as I would have done.
One of these days when we can get Spring commands to recognize my files, John and I will change the Title Page for Geo. His new link page is lovely, isn't it!!! Very special Aloha to him for posting the complete package with a very neat little hot link.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 278 of 637: Curious Wolfie (wolf) * Tue, Nov 20, 2001 (14:11) * 1 lines
oh marcia, i'm so happy to see you!!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 279 of 637: Marcia (MarciaH) * Tue, Nov 20, 2001 (17:19) * 1 lines
Whoooopee Wolfie! Now, if only John would have checked in before he went to sleep. A bit of my own medicine? I hope he would never be that unhappy with me. *Big Hugs*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 280 of 637: Cheryl (CherylB) * Tue, Nov 27, 2001 (17:31) * 1 lines
Marcia, glad that you've gotten your connection back. I was visiting with Mom over Thanksgiving. I'm just catching up on the computer today. I hope that you and Wolfie had great holidays. As for John, is St. Basil's Day coming up soon? If it is, Happy St. Basil's Day, John.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 281 of 637: Marcia (MarciaH) * Tue, Nov 27, 2001 (19:59) * 3 lines
*HUGS* Welcome back, Cheryl. I had dinner in elegant surroundings at the summit of Kilauea on the rim of the caldera. Unhappily the erutpion was downrift and I could not see it, and the fumes were unbelievably thick. We all coughed most impressively. In any case, it was a joy to be there surrounded by freshly scrubbed geologists. That alone made it worth the trip.
I'm checking on St Basil's Day, but that sounds more Russian Orthodox than Greek. I obvioulsy need to do some more homework. Cheryl, you're a treasure. What I don't know would fill an ocean of space. Your additions to the information in my cranium are most appreciated! (I wonder if there is a graphic I can post for St Basil's Day....)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 282 of 637: John Tsatsaragos (tsatsvol) * Thu, Nov 29, 2001 (02:26) * 4 lines
Hi all
Our St. Basil's Day is on 1st of January each year. We have holidays in this day also. Thank you Cheryl.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 283 of 637: Marcia (MarciaH) * Thu, Nov 29, 2001 (13:50) * 1 lines
I need a far better list of Greek holidays than I currently have available to me. Thank you for the verification, John. Cheryl is a splendid source of information that has managed to elude me. I am like most of the rest of the readers of Geo. I am also learning!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 284 of 637: John Tsatsaragos (tsatsvol) * Thu, Nov 29, 2001 (20:56) * 5 lines
Hi
I would like to remind you that you could follow recent pre-earthquake activity for Greece in response 241 or
CLICK HERE.
It is updated every day!
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 285 of 637: Marcia (MarciaH) * Thu, Nov 29, 2001 (21:53) * 3 lines
I check it every evening - Hawaiian time - to see what the state of Greek seismcity is. It looks good for you. Very low amplitude. That is a great relief to me. Please, may it continue that way!
Thank you, John. Your data is fascinating. You have made Geo very special.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 286 of 637: Marcia (MarciaH) * Sat, Dec 15, 2001 (18:27) * 4 lines
A fascinating documentary on the world's faults and especially the San Andreas Fault in California, USA was on The Discovery Channel today. The blind faults which never surface but deform rocks around them were amazingly visible in road cut rocks. It reminded me of the following folding of a similar faulting and folding half a world away in Greece:
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 287 of 637: John Tsatsaragos (tsatsvol) * Tue, Dec 18, 2001 (10:42) * 7 lines
Impressive picture Marcia.
I don’t know from where exactly in Greece is this picture. It appears to me that these rocks are folded when the under of them ground layers are in semi-liquid state. You can see this icon in many rock quarries in Greece. But does not exist visible faults there. Maybe I can find more for these rocks if I know the place or the area.
I am still without web connection from my house. My telephone line has a strong noise. Weather conditions are very bad in my area with much snow. So, I cannot post my updated graph. I am sorry. Greek area appears seismically enough quiet for the next ten days.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 288 of 637: Marcia (MarciaH) * Wed, Dec 19, 2001 (22:23) * 3 lines
*Hugs* John! Be safe in all that slippery white stuff you have all over the ground there.
I "borrowed" the image from an early page I found when I was researching Greek geothermal activity. I will find the source again tomorrow when my head and eyes hurt less than they do now. Folding as in the picture above is usually from sub-surface faults under stress, the rocks fold instead of rupturing at the surface where we usually see upthrust blocks and large offset tracts of land.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 289 of 637: John Tsatsaragos (tsatsvol) * Fri, Dec 21, 2001 (05:21) * 13 lines
Hi all.
*Hugs* Marcia! Many peoples have headache here this period. I think that you must protect more your eyes. Put contrast of your monitor in lower level. Maybe you need and a filter on your monitor. They help more than 50%. I am sure that your monitor is the causation.
I bow to your Geo-knowledge Marcia. I wonder if I can go in the area of this picture. But now it is impossible. It appears that our Christmas will be white after many years. Movement on the icy roads is too dangerous.
Recent pre-earthquake activity for Greece remains low.
I would like remind to anyone who is interested, that he could follow recent pre-earthquake activity for Greece in response 241 or
CLICK HERE.
It is updated every day!
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 290 of 637: Marcia (MarciaH) * Fri, Dec 21, 2001 (14:22) * 10 lines
Snow returns to northern Greece as weekend approaches
21/12/2001 22:14:18
The cold front returned to Greece with a vengeance on Friday afternoon, with the
country practically cut in two by the extreme weather conditions and snow to the
north from Fthiotida. Traffic police warned motorists that all vehicles required snow chains after Kamena Vourla going north, while the road from Pelasgia to Almyros in Volos was impassable because of deep snow on the road surface.
Fthiotida prefecture and the city of Lamia had also come to a standstill due to
heavy snow, they said. Meanwhile, the General Secretariat for Civilian Protection warned local authorities at all levels on Friday to prepare for the renewed bout of extremely bad weather predicted by the weather service (EMY).
http://www.ana.gr/
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 291 of 637: John Tsatsaragos (tsatsvol) * Sat, Dec 29, 2001 (10:43) * 25 lines
Hello all,
As you can see on the updated graph, my signals are higher than the background level. I made the following graph making zoom, on today's updated graph, for 10 days time period and for less amplitude scale.
I will try to update also this graph!
You can see on this graph that the amplitude before the near Patra's EQ was about 5.7mVolts.
During the last 24 hours the signal is a little bit lower but not on the background level. Perhaps, this means that is prepared an EQ in enough distance from my station or that is too soon in order to we extract conclusions.
I remind you that the max amplitude before Skyros EQ (M=6.4R) was about 27mVolts. If you want to see it again,CLICK HERE
Marcia, you have right for the time scale. So, I present you the graph below. It is the daily mean tidal gravity curve (blue line). The days of high seismic danger are minus to plus one day around each red arrow.
As you understand, those days are located at the lower and the higher peaks of the tidal curve. Also, it is true that the EQ near Patras city was occurred about 24 hours after the time of the lower peak of the tidal gravity curve. You see also the next high seismic danger days where are located the red arrows, minus to plus one day around each arrow.
I notice that just now we learn Nature's games. If it is to be occurred an EQ during this period, it must be low magnitude (Less than 5R), except if it is too far of my station.
Intentionally, I have cut out important information in order to be more interesting this presentation. What I have cut out?
(Please feel free and come to discuss with us. Perhaps your opinion is important and you can help by this way. If not, it will be our pleasure to inform you.)
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 292 of 637: Curious Wolfie (wolf) * Sat, Dec 29, 2001 (11:56) * 1 lines
John please be careful! it looks like you guys are in for another one *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 293 of 637: Marcia (MarciaH) * Sat, Dec 29, 2001 (14:04) * 6 lines
Since I speak with you often, John, I usually make my uneducated guesses about your prediction signals in private. Everyone should know that there are no such things as "stupid" questions, and that we are all in the learning stage. John is far ahead of us. He is my guide for the things I am struggling to understand.
I will study carefully your magnified graphics. What possibly can be missing?!
Other than the positions of the sun vs moon and their collected effect on the earth's crust. Tidal forces must be part of this equation.
(John's math and physics far exceed anything I can begin to understand!)
*Hugs* John. This is wonderful mental exercise for us. I am grateful for your hard work and wonderful graphics!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 294 of 637: John Tsatsaragos (tsatsvol) * Sun, Dec 30, 2001 (12:54) * 32 lines
Hello my friends,
First, I will inform you for our current seismisity from:
http://www.emsc-csem.org/
2001/12/30 04:06:58.5 35.7N 25.0E 138 Mb5.0 M+ CSEM CRETE, GREECE
2001/12/30 04:06:45.3 35.5N 27.8E 140 M 4.6 M GSSC DODECANESE ISLANDS, GREECE
2001/12/30 04:06:45.3 35.5N 27.8E 140 A GSSA DODECANESE ISLANDS, GREECE
2001/12/30 04:06:40.0 36.0N 27.0E Mb4.9 A! LED DODECANESE ISLANDS, GREECE
2001/12/30 04:06:33.9 34.2N 28.2E 10 Mb4.9 M GII EASTERN MEDITERRANEAN SEA
2001/12/30 04:06:28.0 34.8N 27.4E Mb5.0 M NEIR EASTERN MEDITERRANEAN SEA
2001/12/30 04:06:24.0 36.3N 29.0E mb4.7 A MAD TURKEY
2001/12/30 04:06:23.7 34.7N 27.5E 10 Mb4.4 A MIX EASTERN MEDITERRANEAN SEA
2001/12/30 04:06:19.4 34.7N 27.9E 10G Ml5.5 A: INGV EASTERN MEDITERRANEAN SEA
2001/12/30 04:05:40.1 32.9N 32.5E Mb5.0 A SED EASTERN MEDITERRANEAN SEA
We had in Greece new seismic activity as you see. Seeing my signals on the updated graph in my previous response, we can say that this new fact was possible. The signals are not on the background level but they have low amplitude. Marcia had predicted this EQ in response 1067/topic 22 on December 28. Congratulations Marcia!
The second graph in my previous response is already updated too (That that is relatively to the most dangerous days). We are already in the middle of the dangerous period today. So, the second part of a complete prediction, about WHEN is possible to occur this EQ, was:
From December 30 to January 1.
I told you that I have cut up important information. I was waiting this question:
WHERE?
Finally, I present you the following time based animation with the azimuth directions that I have calculated during the last 10 days.
Blue arrow represents the azimuth direction each time.
I will leave conclusions to you.
The progress of my signals is very interesting and the responding of the Earth too.
Congratulations to Marcia again.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 295 of 637: Marcia (MarciaH) * Sun, Dec 30, 2001 (22:40) * 5 lines
I see that the signals miss Thessaloniki. For that we are grateful. However, how much do you know about the central point of origin of these signals? Surely some of them are in the direction of north from you where all of the historic great quakes have ravaged Turkey. How can you tell which ones will originate in Volos? I worry about your safety!
I am happy the quake has happened. But, I also suspect you have not had the last of this series. It is not a scientific thought this time, it is more like an apprehensive feeling for your safety! I am not given to "feelings" and other wizardry for determining such things; I hope this feeling is just worry for your well-being.
Thank you, John. This is the most exciting adventure, ever!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 296 of 637: Curious Wolfie (wolf) * Sun, Dec 30, 2001 (22:53) * 1 lines
wow!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 297 of 637: Marcia (MarciaH) * Sun, Dec 30, 2001 (22:58) * 5 lines
Any one who does not study your tidal data and see how accurate it is... they are foolish. I also see tha the 30 January tidal forces will be greater than for this last quake. I will be studying your graphs carefully!
http://tvnight.org/yapp-bin/restricted/read/Geo/9.291 updating tidal graph
http://tvnight.org/geo/JohnVolos/Public/pages/inviation.htm updating earth signals
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 298 of 637: John Tsatsaragos (tsatsvol) * Wed, Jan 2, 2002 (03:22) * 11 lines
Happy New Year to All
We had a new EQ in Greece last night:
2002/01/01 22:15:57.6 37.2N 22.1E 5G Ml4.4 M THE SOUTHERN GREECE
From: http://www.emsc-csem.org/
You can follow the last seismisity in Greece, in responses 291 and 294. Graphs are updated! I notice that the time of these EQ's confirms our theory for the most dangerous days. (Position of red arrows on the graph of the tidal forces in response 291).
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 299 of 637: Marcia (MarciaH) * Wed, Jan 2, 2002 (14:23) * 1 lines
Kudos, John! This is fascinating, especially when the earthqukes did not cause damage. I suspect we have a few more to worry about. May they all be small and in the sea.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 300 of 637: Marcia (MarciaH) * Sat, Jan 12, 2002 (22:08) * 1 lines
My anticipated earthquake has not happened yet. I will monitor it carefully via the European seismic centers and John's indicators. I hope the amplitude does not continue to build...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 301 of 637: Paul Terry Walhus (terry) * Sun, Jan 13, 2002 (05:01) * 1 lines
Which quake again? Details?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 302 of 637: John Tsatsaragos (tsatsvol) * Mon, Jan 14, 2002 (03:55) * 11 lines
Hello Terry and All,
I suggest that you can see my responses 241, 291 & 294, (if you have time). They are containing everyday updated graphs. You can find (with simple logic) if it is to occur someone event in Greece and WHEN it is possible to occur. Maybe you can estimate the magnitude too.
I will give you any help if you want it. Marcia is very good and observant student. I have to make only one notice. Earth’s procedure is very dilatory and we must be patient. Surely is prepared an event! And Marcia has already one correct prediction (without my help) that was realized!
I am here ready to discuss anything you need.
*Hugs*
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 303 of 637: Marcia (MarciaH) * Mon, Jan 14, 2002 (13:34) * 3 lines
I can vouch for John's silence on my predictions. I make them on my own and post them in topic 26 before I talk to him about it. He is a true pragmatist and careful scientist, so his opionions are far more guarded than mine are.
This was my second prediction if the 4.5 previous quake counted!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 304 of 637: Marcia (MarciaH) * Mon, Jan 14, 2002 (13:38) * 1 lines
Terry, my prediction was on Geo 26 - at least 24 hours before it happened.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 305 of 637: John Tsatsaragos (tsatsvol) * Tue, Jan 15, 2002 (05:58) * 23 lines
Hello all,
I think that we have to
Marcia for she's second correct prediction! From my side, I must tell you that she made she's prediction without any help!
But, what really predicted Marcia this time?
I will present you this EQ on my signals graph. Here is!
It is not magic! It is simply logical conclusion!
Now, I have some additional notices:
1. This EQ occurred inside the most dangerous days window, which you can see in response 291.
2. Having in mind the amplitude of Skyros EQ signals (of about 27mVolts) and seeing that the amplitude of my signals before this EQ was about 6.4 mVolts we can conclude that the magnitude of the expected EQ must be enough less than Skyros EQ if it will happen in the same distance. So my area (where is my station) will be safe.
3. This is a good example about how we can predict EQ's. But I request you to think how we can react if we see big signals. I want to discuss this problem with all of you. I think this is bigger problem than the prediction.
4. I would like to remind you that you could follow recent pre-earthquake activity for Greece in response 241 or
CLICK HERE.
It is updated every day!
Additional updated information you can find in responses 291 and 294.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 306 of 637: Marcia (MarciaH) * Tue, Jan 15, 2002 (10:22) * 3 lines
I have discovered several disaster preparedness books on my shelves. One by the American Red Cross and one by the Federal Emergency Managenment Agency (FEMA) with guidelines to help wih this difficulty. I'll continue this discussion both here and more extensively Geo 47. These books, along with the things I have learned from experience, provide only a brief outline for the most obviously basic needs. More extensive preparations need to be discussed, written down and be made a reference for all those who face disasters Please help us formaulate good plans both pre and post event eventuality.
Truthfully, John is an excellent teacher, and I just followed his observation conclusions for a little while. I also noticed there were gathering signal intensities. It is an easy thing to do. He crunches the data and presents the graphs fully grown. Our task is an easy one. Try it! I think you will find in highly satisfying. There really are ways to foresee these disasters, large and small.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 307 of 637: Curious Wolfie (wolf) * Tue, Jan 15, 2002 (18:08) * 1 lines
you did a very good job *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 308 of 637: Marcia (MarciaH) * Tue, Jan 15, 2002 (18:24) * 3 lines
Thanks, Wolfie. I need all the encouragement I can get. I spent a large part of the morning justifying Geo.
This research John is doing deserves not only praise for him but wide dissemination and support. It is frustrating to realize how hard he has worked and for 20 or more years, and we are just now learning about it. Before him, I evaporate and disclose the real hero of this story!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 309 of 637: Curious Wolfie (wolf) * Tue, Jan 15, 2002 (21:28) * 3 lines
what? why on earth would you need to justify it (bad pun unintended)
yes, john's mechanism is really really cool even if i don't understand it very well.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 310 of 637: Marcia (MarciaH) * Tue, Jan 15, 2002 (23:14) * 1 lines
John is the resident Phyisicist. Are you and I supposed to understand how it works? That it works is impressive enough for me!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 311 of 637: John Tsatsaragos (tsatsvol) * Wed, Jan 16, 2002 (14:44) * 13 lines
Hello all
The way to get knowledge from the nature is long and we have to fight the human nature as well. I notice that human believes easier what he hopes to hear and not the visible truth.
Success is something that needs luck and favorable destiny. In any case we have to try for the truth. I believe that absolute truth does not exist or we cannot find it. But we can go close to it.
It appears that I found something correct on EQ prediction and I share it with you. Discussion helps to find us unknown parts of nature laws. Feel comfortable and tell us what you don't understand or what you think. (Wolfie?)
Marcia, I am not something special. I am just like you with human inabilities and passions. I use simple logic as every one of you. I don’t want to teach you but to discuss with you as equal between equals. Maybe someone of you have more useful ideas than these I have. I am ready to learn from you too.
*Hugs*
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 312 of 637: Marcia (MarciaH) * Wed, Jan 16, 2002 (15:14) * 4 lines
We will share what we know. Perhaps I stated my math difficulties incorrectly.
I am following what you are showing in your graphs and studying them carefully before making predictions.
I suggest between you tidal forces and earth signals being at a low point in their cycle and amplitude, that you are safe from EQs in Greece until close to January 30th danger period.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 313 of 637: Marcia (MarciaH) * Wed, Jan 16, 2002 (16:34) * 5 lines
I have erred. Valleys are as important to note as are peaks
http://tvnight.org/yapp-bin/restricted/read/geo/9.291
http://tvnight.org/geo/JohnVolos/Public/Seismology/GreeceDD1.gif
January 23rd is the next window of danger. I am obviously still learning to be more careful in my studying. Please don't make me do this alone. If I am going to make mistakes, I'd appreciate company. Also, if I am right, I would be happier to share the successful feeling! Too bad Hawaii is so quite, now. I'd better be careful of what I wish for. I just might get it!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 314 of 637: John Tsatsaragos (tsatsvol) * Thu, Jan 17, 2002 (03:17) * 8 lines
I know well your enthusiasm Marcia. It is a strong and strange feeling. Especially when you see that your prediction is correct and it follows the nature law that you have in mind. It is like you are walking on unsearchable paths in a new land. You feel as an explorer.
It is very easy to make some omissions under this enthusiasm. But you have corrected it. I will stay muted on your predictions. I think this is the best way to explain later how we work on it. Maybe our friends they have questions and they want to ask. I am sure that they are interesting but some fear keeps them invisible. I share this knowledge to all of you. Please feel comfortable and ask us.
*Hugs*
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 315 of 637: Marcia (MarciaH) * Thu, Jan 17, 2002 (19:36) * 3 lines
We are like little children who are learning to walk. If we do not make attempts to walk and fall down in the process, we will never learn to walk. Please do not leave me out here making mistakes all by myself. Surely there are others who are interested enough to make these predictions with me. John is already an expert, but if I don't start running now, I'll never catch up with him. *Sigh*
*Hugs*, John, keep us learning. This is fascinating to me. I look forward to seeing your data each day like a small child with a great secret.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 316 of 637: Curious Wolfie (wolf) * Fri, Jan 18, 2002 (19:39) * 1 lines
marcia, i make mine in my head, but i'm with you all the way!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 317 of 637: Marcia (MarciaH) * Fri, Jan 18, 2002 (20:33) * 1 lines
*Sigh* You are going to let me fall down all by myself? I guess that "honor" goes to the hostess of this conference.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 318 of 637: Curious Wolfie (wolf) * Fri, Jan 18, 2002 (21:35) * 1 lines
i will never let you fall sweetie!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 319 of 637: Marcia (MarciaH) * Fri, Jan 18, 2002 (23:31) * 1 lines
*Hugs* Sweetie, I know you wouldn't! You're my twin and we'd look pretty silly at this age with scuffed knees!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 320 of 637: Marcia (MarciaH) * Sat, Jan 19, 2002 (16:36) * 3 lines
Check the cable connections and then we can better judge what the current downward spike indicates. I see it had happened before. If this is not a spurious signal, there is definitly something in the offing for Greece.
(How do you stay warm in such cold weather? I'm freezing!)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 321 of 637: Marcia (MarciaH) * Sat, Jan 19, 2002 (22:49) * 2 lines
John, Now I am worried for you. The signals have quickly enlarged in amplitude.
This is no anomaly you have tracked. This is the warning of Greek earthquake of more than usual mildness.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 322 of 637: John Tsatsaragos (tsatsvol) * Sun, Jan 20, 2002 (10:03) * 12 lines
Hi all,
I worried when I saw this serious jump suddenly in my signals. Finally the cable between my instruments and the electrodes was OK. So, I am sure now that this signal is real...
Let us suppose that this signal is coming from the wide area where live each one of you and you are seeing it first and alone. What you must do? Just think about it and answer to yourself alone. This is a useful self-test. I know how difficult is. We will discuss it later.
Please Marcia, we need self-control and less enthusiasm if it is possible. Surely we are observing a special natural phenomenon. It is better to observe the progress of this phenomenon carefully without comments. We have time to discuss and explain everything later when nature will finish its "song". We will have common data for a clear discussion on them.
Regards
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 323 of 637: Curious Wolfie (wolf) * Sun, Jan 20, 2002 (13:11) * 1 lines
uh oh, i'm going straight to the john's greek earthquake predictor and take a look see for myself!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 324 of 637: Curious Wolfie (wolf) * Sun, Jan 20, 2002 (13:12) * 1 lines
oh no, that doesn't look good at all. john, is it possible that the "little" quakes marcia's been observing are leading up to this? is it also possible that your unusual weather is a contributing factor as well?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 325 of 637: Marcia (MarciaH) * Sun, Jan 20, 2002 (13:56) * 5 lines
Thank you, John. I need my enthusiasm kept in check. Science and emotional reactions (no matter how sincere) do not go well together. I have accepted that your house is safe - if any house can be safe in a strong EQ. We must wait to see what the succeeding signals tell us. I accept your gentle admonishment as a good student learns from an excellent teacher.
I still think Greece is going to have an earthquake. Where and when and how strong still remain to be seen. The Skyros quake for which you posted signals took several days of increasingly large signals. We will watch carefully.
Wolfie, hang on - we may all be in for a ride if it is strong enough!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 326 of 637: Michael McNeil (Weatherlawyer) * Sun, Jan 20, 2002 (19:54) * 35 lines
Long period events are the signals Dr Bernard Chouett of the USGS, has
pointed out as the classic signal that a volcano is about to erupt.
Previous research into the same data had looked at short period events.
These latter were the sounds of rock breaking in a tremor. They appear
on the graph at full intensity and rapidly fade. Long term events are
more similar to pipe organ notes. They build up to full intensity and
fade away gradually.
The BBC programme from a few days before the Congolese eruption
concentrated on the prediction of Mt Popocatapetl. When the volcano
erupted it's most violent eruption in a thousand years, those most at
risk had been evacuated a day or so earlier.
Not one human life was lost.
Previously he had informed the Colombian Institute of Geoscience that
when the caldera sealed and the volcano began to pressurise, the
seismographs would show these "Long Period Events." 4 days after the
appearance of these events, the volcano "Galeras" erupted.
Also present at the site were the researchers Stanley Williams and John
Stix. These two scientists were reaching the same conclusions based on
gas levels. They organised a field trip of 12 scientists and 3 tourists
to the caldera.
At 1:30 ish that afternoon the eruption started. It hurled 1 ton
boulders a mile high. It killed 9 of them.
http://www.bbc.co.uk/science/horizon/2001/volcanohell.shtml
One wonders why the tens of thousands of people at the site of the
recent Congalese eruption were not warned.
You might want to superimpose yor graphs, John, with the seismic data that shows these "B type" signals.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 327 of 637: John Tsatsaragos (tsatsvol) * Mon, Jan 21, 2002 (11:55) * 21 lines
Marcia, Wolfie and Mike:
I have spent much time (more than 10 years) and I have made a long list of phenomena that are observed before earthquakes. Then I found the causes, which can also produce each one of them. None was produced from EQ preparing process alone. Weather is between them.
We need to find and observe phenomena that are products of the preparation process of the EQ alone and they cannot be produced by other mechanisms, including human activities. Only in this case we have possibilities to make correct predictions.
I have made a very tired research of the electromagnetic spectrum below 30KHz for years. I found many interesting relationships between specific frequencies and nature’s phenomena like the weather on Earth or like the ionosphere changes, which are depended on the solar wind, etc. I found also relationships between specific frequencies and human activities such are submarine communication emissions, telecommunications, emissions from the electric power lines etc.
Searching always-lower frequencies, I found that below 1 Hz the electromagnetic spectrum is clearer of the above interference. Also there does not exist human activity because are needed special and too expensive instrumentation to use these frequencies. I notice here that if we try to receive lower and lower frequencies, the difficult degree increases for the same reason,. Additionally, the level of the signal that we have to receive must be about 10 times higher than the background noise, for a clear reception. This is the SIGNAL/NOISE ratio factor that is critical in any electromagnetic reception.
But what is the reality under 1 Hz?
At the area around 0.1 Hz of the electromagnetic spectrum that we can receive on the ground, background noise level has about equal level with the part of the electromagnetic emissions during the EQ preparation. Resolving power is enough restricted in this area, as you can easy understand. (SIGNAL/NOISE = 1).
In this area, which is inside the ULF band, they are working many researchers around the world and also VAN GROUP in Greece. In this area is also my first filtering stage.
Notice: frequency = 0.1 Hz is the same with period = 1/frequency = 1/0.1 = 10 seconds.
Going at lower frequencies, SIGNAL/NOISE increases and we have better resolving power. My final filter separates the signals that have period of 24 hours. I have SIGNAL/NOISE = about 8 that is enough good Signal to Noise Ratio factor. This is the first reason for my good results.
Regards
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 328 of 637: Curious Wolfie (wolf) * Mon, Jan 21, 2002 (12:42) * 1 lines
John, you amaze me! *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 329 of 637: Marcia (MarciaH) * Mon, Jan 21, 2002 (13:21) * 5 lines
There is much about John that amazes me. I am running as fast as I can and will never catch up with him, alas. All I can hope for is a pause in his forward speed to make up for my slowness.
John, you mentioned nothing humans do makes a difference. This means the suspected removal of oil along faults in California or injection of waste water along other faults there for geothermal purposes does not cause some of the little quakes detected there? I am not challenging your opinions, I am merely asking for more information. In any case, it is morning for me and the world seems to be quiet for the moment - unless you consider the volcano in Zaire.
Thank you for a most considered response. I will read it many times and forward it to my son.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 330 of 637: Marcia (MarciaH) * Mon, Jan 21, 2002 (13:26) * 3 lines
I think Hawaii will prove a very different for one of your seismic signal detection installations from the one you have in Greece. I am usually VERY observant, and only the weather causes changes in the activity of insects. I have heard nothing from earthquakes, but I will check other sources.
I hope your press interview went well. Our John is becoming very famous in Greece. I wish one of our "networks" in the US would devote 15 minutes to him.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 331 of 637: Curious Wolfie (wolf) * Mon, Jan 21, 2002 (13:35) * 3 lines
john, what marcia brings up stems from a question the AM asked. he wonders whether or not the oil and whatnot in the ground acts as a lubricant in the faultlines.
i can't believe we haven't heard anything about john's work over here.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 332 of 637: Curious Wolfie (wolf) * Mon, Jan 21, 2002 (13:38) * 1 lines
you know, the unusual weather question i asked about was concerning what the ground is "used" to. you know? and we know that extreme cold/heat causes contractions and expansion could it also affect the ground? or are the faultlines so far under the ground that what goes on "up here" couldn't possibly affect it. what about as the water and snow drains into the earth?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 333 of 637: Curious Wolfie (wolf) * Mon, Jan 21, 2002 (13:54) * 1 lines
john, i just went to your EQ predictor and those signals were from a 4.4 (the peaks marcia and i were wondering about)? wow, amazing how the signals can vary widely and really have nothing to do with the magnitude of the EQ?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 334 of 637: Marcia (MarciaH) * Mon, Jan 21, 2002 (22:17) * 3 lines
http://tvnight.org/geo/JohnVolos/Public/pages/inviation.htm
Look at the Skyros earthquake graph of signals. I suspect Greece is in for another one of at least that magnitude. SOON! There were two more quakes in the area of Greece and the Aegean, but none in the 5.R range so far.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 335 of 637: Curious Wolfie (wolf) * Mon, Jan 21, 2002 (22:41) * 1 lines
that's interesting how they occur at the top and bottom of the signals! but you're right, Skyros signals were off the graph!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 336 of 637: Marcia (MarciaH) * Mon, Jan 21, 2002 (22:54) * 3 lines
Could the crust of the earth be responding to stress? When it reaches a high enough point in some already-weak part of the world and the sun and moon are aligned just right I suspect this might cause the fault to react just as when you bend a cracker. Perhaps a poor analogy, but I was thinking of ginger snaps!
I am still awaiting John's explanation of how weather also has a causal effect on earthquakes. I have so much to learn. I suspect I will be forever guessing and getting it all wrong. *sigh*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 337 of 637: Marcia (MarciaH) * Tue, Jan 22, 2002 (00:02) * 8 lines
2002/01/22 04:54:07.8 37.0N 24.7E Mb7.3 A SED SOUTHERN GREECE
2002/01/22 04:54:00.6 36.7N 25.5E Mb7.5 A SED DODECANESE ISLANDS, GREECE
2002/01/22 04:53:57.1 35.1N 27.2E 10 Mb5.9 M GII DODECANESE ISLANDS, GREECE
2002/01/22 04:53:46.6 35.7N 26.9E mb5.9 A MAD CRETE, GREECE
2002/01/22 04:53:45.8 35.7N 26.8E 33G Mb6.3 A NEIA CRETE, GREECE
2002/01/22 04:53:41.1 35.6N 27.2E mb5.9 A MAD DODECANESE ISLANDS, GREECE
2002/01/22 04:53:40.0 35.0N 27.0E Mb6.4 A LED DODECANESE ISLANDS, GREECE
2002/01/22 04:53:26.0 34.5N 28.2E Ml5.5 A: RNS EASTERN MEDITERRANEAN SEA
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 338 of 637: Marcia (MarciaH) * Wed, Jan 23, 2002 (23:01) * 21 lines
6.6-Richter quake hits southeastern Greece
A powerful earthquake measuring 6.6 on the Richter scale was reported at 6:54
yesterday morning, deep under the seabed west of Karpathos, 380 kilometers
southeast of Athens, the Athens Geodynamic Institute reported. It caused alarm
in many parts of Greece and the eastern Mediterranean but there were no
reports of injuries or significant damage, thanks to the great depth of the
epicenter.
The quake was felt as far away as Corfu off northwestern Greece, Patras in the
Peloponnese, as far east as Israel and in Egypt in the south. The residents of
the Dodecanese, Crete and southwestern Turkey were jolted the most. A man in
Turkey died of a heart attack.
The epicenter was 104 kilometers below the surface.
"If it had been a little further south and closer to the surface, it would have
caused serious damage to the cities of northern Crete," said Akis Tselentis,
professor of seismology at Patras University.
The secretary of the Geotechnical Chamber of Greece, Haralambos Fasoulas,
said, "Crete and the region of Iraklion must be studied further, because of the
nature of the sub-surface."
http://www.ekathimerini.com/news/content.asp?aid=115705
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 339 of 637: John Tsatsaragos (tsatsvol) * Wed, Jan 23, 2002 (23:25) * 34 lines
Hello my friends
Congratulations to Marcia again, for her new correct prediction in topic 26, response 1224 on 19th January. Congratulations to Wolfie too. She had seeing that the signal was big and was wondering how big EQ will be occurred. (In topic 26, response 1225 on 20th January).
On 22nd January, in our local morning, we had a big EQ that was 6.3R by NEIC report, or 6.6R Ms as Greek seismologists are saying. The epicentre was in the Sea and in depth of about 100 Km, NW of island Karpathos and Eastern of Island Crete. There is the main fault between African and Eurasian plates. It was a very strong EQ that shakes Egypt, Turkey, Cyprus, Greece and Italy. We had no serious damages in Greece.
Let to make us a flashback. On 21st January you see in my daily updated graph:
It is recorded high amplitude of 17.1 mVolts. That means two things:
First: A big EQ will be occur in a few days
Second: The area around my station will have not sequences, if the signal does not become higher. This is a conclusion after the EQ in Skyros Island (M=6.3R Ms) when we had signal of about 27 mVolts. Even if that EQ was felt in my area was not destructive. EQ that gives max pre-earthquake signal less than 27mVolts will be without sequences in Volos area.
But WHEN we must expect the EQ?
We must see the tidal graph, in order to find WHEN. The EQ will be occurring within the 3 next most dangerous days on this graph. It was 21st January and as we can see on the graph, the next most dangerous days are 21st, 22nd and 23rd January.
This is absolutely correct as you see in the above graph. One other conclusion is that THIS EQ WAS THE MAIN because the signals degrease.
Next question is WHERE?
On 20th January, mine process and Dr's Thanassoulas process on my signals, it gives the azimuth direction to the East-West of my station, Here is the exactly azimuth direction and where finally occurred the EQ.
Blue arrow on the above map, represents what azimuth direction we had calculated on 20th January.
Unfortunately I have only one station and I cannot find the epicentre on this line. I need two additional stations (at least), in order to calculate the position of the epicentre and the value of the magnitude too.
Regards
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 340 of 637: John Tsatsaragos (tsatsvol) * Thu, Jan 24, 2002 (10:51) * 5 lines
I am sorry. I made a small misprint above. Correct is:
On 20th January, mine process and Dr's Thanassoulas process on my signals, it gives the azimuth direction to the Southeast of my station. Here is the exactly azimuth direction and where finally occurred the EQ.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 341 of 637: Curious Wolfie (wolf) * Thu, Jan 24, 2002 (18:55) * 1 lines
*YAAAAAAY*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 342 of 637: Marcia (MarciaH) * Sat, Jan 26, 2002 (23:01) * 1 lines
If I could figure out a way to throw a party in Geo, I know who would be the guest of honor!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 343 of 637: Curious Wolfie (wolf) * Sun, Jan 27, 2002 (10:37) * 1 lines
we can throw a party in geo--remember all the stuff posted for birthdays? we can do it the same way (and i don't think terry has read my email about ftp yet!)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 344 of 637: Marcia (MarciaH) * Sun, Jan 27, 2002 (14:39) * 3 lines
I'll email him. It only takes a little time and fiddling. So, I just emailed him.
We'll party! My mind has just kicked up into high gear. =)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 345 of 637: Curious Wolfie (wolf) * Sun, Jan 27, 2002 (20:42) * 1 lines
*woohoo*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 346 of 637: Marcia (MarciaH) * Sun, Jan 27, 2002 (21:29) * 1 lines
My thought, exactly! Now, since I have been up since 0500 today trying my hardest to keep from missing John again, he is not online. Wolfie, have you heard from him? I feel like a dog chasing its own tail.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 347 of 637: Marcia (MarciaH) * Mon, Jan 28, 2002 (18:29) * 10 lines
More seismic activity in Ionian reported
28/01/2002 14:15:08
A strong quake measuring 5.2 on the Richter scale was recorded Saturday evening
with an epicentre south of the Ionian island of Zakynthos, some 260 kilometres
southwest of Athens.
The quake was recorded at 10:05 p.m. No damages were reported.
On Friday an earthquake measuring 4.6 on the Richter scale was recorded at
7:55 p.m. in a sea region south of another island in the Ionian sea, Cephallonia.
http://www.ana.gr/
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 348 of 637: Marcia (MarciaH) * Mon, Jan 28, 2002 (18:38) * 6 lines
Zakynthos quake
A strong undersea quake measuring 5.2 on the Richter scale took place south of the Strofades islets
near the Ionian island of Zakynthos just after 10 p.m. on Saturday, the Athens Geodynamic Institute
said. No injuries or damage was reported.
http://www.ekathimerini.com/4dcgi/_w_articles_politics_100021_28/01/2002_12712
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 349 of 637: Curious Wolfie (wolf) * Mon, Jan 28, 2002 (21:05) * 3 lines
marcia, i've not heard from john either. *HUGS*
so the stuff's not over over there huh? i thought the waves were calming down. maybe i oughta take a look-see again.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 350 of 637: Curious Wolfie (wolf) * Mon, Jan 28, 2002 (21:06) * 1 lines
the waves are calm as of yesterday.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 351 of 637: Marcia (MarciaH) * Tue, Jan 29, 2002 (09:34) * 1 lines
Greece is pretty calm. John is recalibrating and crunching numbers. I sis talk to him finally. Now I wonder where Rob went. I guess NZ finally dried out. Today is my turn for thunder storms.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 352 of 637: Marcia (MarciaH) * Tue, Jan 29, 2002 (18:15) * 1 lines
Not so calm, anymore. John signed off last night my time with a word of concern and to watch today's data. Of course, now he is sleeping and I will pace the floor worrying what he had seen. 10 hours can seem like forever!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 353 of 637: Curious Wolfie (wolf) * Tue, Jan 29, 2002 (18:40) * 1 lines
oooo, i'm going to check the waves!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 354 of 637: Marcia (MarciaH) * Tue, Jan 29, 2002 (18:53) * 1 lines
Honey, he won't post it till morning, his time. That means at least 8 PM your time. *sigh* It was an interesting three hours last night with my son eager to work with him on one IM and John on the other and me sending each other's messages to the other. It got so amazing that I even got our timezones on the wrong side of the Greenwich Meridian! Son was certain he sensed an earthquake in California, John was crunching data and it was not many minutes after we signed off for the night that the southern Califoria quakes began. It was surreal.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 355 of 637: Marcia (MarciaH) * Tue, Jan 29, 2002 (23:17) * 1 lines
*SIGH* All is well for the time being. We are learning much by studying, but each thing we learn makes more puzzles to solve.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 356 of 637: John Tsatsaragos (tsatsvol) * Wed, Jan 30, 2002 (06:22) * 23 lines
Hello friends
It is very interesting that the 24-hour period signal rises up before big EQ's. Many smaller EQ's, which will be occurred around, they produce small signals that we must mark as without significance. So, we must put a warning low level on the amplitude values. I appreciate that we must put this level at 10 mVolts of amplitude. Lower levels are marking EQ's without danger.
We cannot estimate the exactly magnitude and the epicenter location because I have only one station. But we can calculate the azimuth direction of the epicenter area with very good accuracy. From the other hand, we can estimate the time of when this EQ will be occurred, during the next three dangerous days, which are centered at the lower or higher peak of the mean daily oscillation of the tidal forces. I notice that this fact realizes about 90% of the big EQ in Greek area since 1952.
Now, let us to see my signals again.
Skyros EQ. Distance of my station 125 Km. Magnitude M=6.4R. Time of occurrence was inside the next most dangerous days window. Azimuth direction was very good. It was perceptible in Volos area as with medium power.
Dodecanese Islands EQ. Distance of my station 545 Km. Magnitude M=6.3R. Time of occurrence was inside the next most dangerous days window. Azimuth direction was very good. It was not perceptible in Volos area.
I am thinking that the amplitude of that signals is a criterion of how much perceptible will be the EQ at my station's area. We will see how much correct is this in the future.
I made this correlation table that shows the max signal amplitude for the past two big EQ's in Greece, the corresponding amplitude now and the warning level as described above. Maybe we must change the warning level in the future. I will be updating this table frequently.
Regards
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 357 of 637: Marcia (MarciaH) * Wed, Jan 30, 2002 (12:16) * 3 lines
Thanks you, John. Your new table is must less frighening than your earlier graphs. These strange signals you are now receiving appear to be increasing and have the look of gathering momentum for the next large Greece EQ. This bar chart is more comforting by comparison. I hope this is true. I will bookmark this graph also to watch and coordinate my thoughts concerning the other signals you are receiving.
I still think you are in the danger window for this month...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 358 of 637: _cosmo_ (aa9il) * Wed, Jan 30, 2002 (15:00) * 9 lines
Hi Yall
Wanted to jump in and say Hi - sorry for being so infrequent but its been
utter chaos here. Anyway, saw this was where the activity was so a post on this page. Very interesting previous posts BTW. Would like to participate
in a Geo party also if that happens via IM. Stay cool.
peace
Mike AA9IL
-radio cosmo international-
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 359 of 637: Curious Wolfie (wolf) * Wed, Jan 30, 2002 (19:26) * 5 lines
marcia, simmi valley had several tremors today including a 3.5 (i think) and a 3.0.
the bar graph is harder for me to understand but i got the oscillating one down and it's changing again.
let's have a party!!!! mardi gras is upon us *woohoo*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 360 of 637: Marcia (MarciaH) * Wed, Jan 30, 2002 (21:43) * 272 lines
Party time! Olympics start next soon, too!
U.S. Geological Survey
News Release
Release date: January 30, 2002
Contact: John Filson, 703-648-6696
Carolyn Bell, 703-648-4463
Lee Siegel, 801-581-8993
University of Utah to Monitor Olympic Earthquakes - Thanks to USGS
Jan. 30, 2002 ? University of Utah seismologists will be on duty
around-the-clock during the Olympics, armed with a new $1.2 million system
so they can quickly supply public safety information if any disruptive
earthquakes shake the 2002 Winter Games.
"A basic, real-time earthquake information system has just been completed
in Utah's densely populated Wasatch Front region in time for seismologists
to rapidly deliver key information to emergency managers and the public if
an 'Olympics earthquake' visits Utah," said Walter Arabasz, director of the
University of Utah Seismograph Stations.
The improved earthquake-monitoring system of sensors, computers and
telecommunications equipment was made possible with $965,000 in funds and
equipment provided by the U.S. Geological Survey (USGS), and another
$235,000 in funds and personnel support from the state of Utah.
During the Olympic Winter Games, worldwide attention will focus on the
Wasatch Range, where crowds of people will watch skiers, skaters,
snowboarders and bobsledders compete in steep terrain. The Wasatch Range
appears majestic and serene. But underneath the mountains, rock continues
to grind slowly along the Wasatch fault, lifting the mountains and
producing earthquakes. Although most of these earthquakes are small, there
is the potential for infrequent, large earthquakes, which could have
devastating effects.
Mindful of these facts, and lessons learned from the 1989 "World Series
earthquake" that killed more than five dozen people in northern California,
Arabasz, seismic network manager Sue Nava and other earthquake scientists
at the University of Utah and the U.S. Geological Survey jointly installed
new tools for delivering fast information for public safety if any
disruptive quakes occur during the Olympics.
The new, real-time earthquake system's key information product is a
ShakeMap ? a rapidly generated computer map, available within about 5
minutes of an earthquake, that gives an overview of the location, severity,
and extent of actual ground shaking, just like a Doppler radar image for a
weather disturbance. The information is sent to emergency managers and
appears on the web site www.quake.utah.edu or www.seis.utah.edu
Olympic venues in Wasatch Front valleys are chiefly at risk from damaging
shaking from a moderate to large earthquake of Richter magnitude 5 or
greater. Arabasz estimates there is a 1-in-3,500 probability of "the Big
One" ? a magnitude-7 or stronger quake ? on the Wasatch fault in or near
the Ogden-Salt Lake City-Provo corridor during the time period of the
Olympics and Paralympics.
Estimates indicate a magnitude-7.5 quake on the Salt Lake City segment of
the Wasatch fault could kill up to 7,600 people, injure 44,000 others and
cause about $12 billion in damage.
Moderate quakes are somewhat more likely. Arabasz says the probability of a
magnitude-5 or greater shock within the metropolitan corridor is about 1 in
1,700 during the Olympics or Paralympics.
Even minor to moderate earthquakes of magnitude 4 or more could endanger
alpine venues or their access roads by triggering avalanches or landslides.
The chance of such an earthquake occurring within 9 miles (15 kilometers)
of one of the alpine venues during the Olympic Winter Games is about
1-in-750, Arabasz says.
If the chance of a quake during the Olympics seems remote, consider what
happened during some other sporting events:
n In October 1989, a major quake measuring 6.9 in magnitude (initially
reported at 7.1) rocked the San Francisco Bay region during the third
baseball game of the World Series. A live television audience of millions
witnessed the direct effects of the earthquake shaking Candlestick Park.
That quake killed 63 people, injured more than 3,700 others and caused up
to $10 billion in damage.
n During the 1998 Winter Olympic Games in Nagano, Japan, a magnitude-5
quake rattled alpine skiers at the starting line, shook rooms in multistory
apartment buildings at Olympic Village, delayed bullet trains for two
hours, made floors shudder in the press center in Nagano and triggered a
landslide that blocked traffic.
n Less than two months later, in April 1998, a magnitude-4.5 quake in
Italy made bleachers sway in a soccer stadium in Gualdo Tadino, sending
1,500 panicked fans fleeing. Two were injured.
The usefulness of the new ShakeMap system is illustrated by what happened
in the first few hours following the 1989 World Series quake, which was
centered 60 miles southeast of San Francisco. Emergency responders had poor
information on where the strongest shaking and greatest damage actually
occurred. They depended unduly on news media reports to guide their
response actions, and overlooked for hours some hard-hit areas. ShakeMaps
can identify areas of strong shaking within minutes.
Arabasz and Nava realized in 1998 they might have to deal with a 2002
"Olympics earthquake" on their watch. They set out to find funding to build
a real-time earthquake information system in Utah, patterned after a $20
million state-of-the art system in southern California. Now that the basic
$1 million system is in place, Utah seismologists will be on duty seven
days a week around-the-clock during the Winter Games, just in case they
need to provide quick information on an earthquake.
Although installation of the earthquake monitoring system was accelerated
to be in place for the 2002 Olympic Winter Games, the primary motivation
was to provide for the long-term needs for earthquake safety in Utah's
dramatically growing Wasatch Front area. Similar efforts are underway in
other at-risk U.S. metropolitan areas under a program known as the Advanced
National Seismic System (ANSS). Authorized by Congress in 2000 and led by
the USGS, the ANSS plan calls for installation of over 6,000 sensors to
monitor earthquake shaking in 26 metropolitan areas across the United
States. ANSS is currently only about 5 percent completed, but substantive
progress has been made in a few select regions such as the Salt Lake City
metropolitan area, the Seattle-Tacoma region, and the San Francisco Bay
area.
In addition to the ANSS seed funding from the USGS, the University of Utah
also received help from the Union Pacific Foundation, the Utah Division of
Comprehensive Emergency Management, the Federal Emergency Management
Agency, and the Utah Geological Survey.
*****
The USGS serves the nation by providing reliable scientific information to
describe and understand the Earth; minimize loss of life and property from
natural disasters; manage water, biological, energy, and mineral resources;
and enhance and protect our quality of life.
U.S. Geological Survey
News Release
Release date: January 30, 2002
Contact: John Filson, 703-648-6696
Carolyn Bell, 703-648-4463
Lee Siegel, 801-581-8993
University of Utah to Monitor Olympic Earthquakes - Thanks to USGS
Jan. 30, 2002 ? University of Utah seismologists will be on duty
around-the-clock during the Olympics, armed with a new $1.2 million system
so they can quickly supply public safety information if any disruptive
earthquakes shake the 2002 Winter Games.
"A basic, real-time earthquake information system has just been completed
in Utah's densely populated Wasatch Front region in time for seismologists
to rapidly deliver key information to emergency managers and the public if
an 'Olympics earthquake' visits Utah," said Walter Arabasz, director of the
University of Utah Seismograph Stations.
The improved earthquake-monitoring system of sensors, computers and
telecommunications equipment was made possible with $965,000 in funds and
equipment provided by the U.S. Geological Survey (USGS), and another
$235,000 in funds and personnel support from the state of Utah.
During the Olympic Winter Games, worldwide attention will focus on the
Wasatch Range, where crowds of people will watch skiers, skaters,
snowboarders and bobsledders compete in steep terrain. The Wasatch Range
appears majestic and serene. But underneath the mountains, rock continues
to grind slowly along the Wasatch fault, lifting the mountains and
producing earthquakes. Although most of these earthquakes are small, there
is the potential for infrequent, large earthquakes, which could have
devastating effects.
Mindful of these facts, and lessons learned from the 1989 "World Series
earthquake" that killed more than five dozen people in northern California,
Arabasz, seismic network manager Sue Nava and other earthquake scientists
at the University of Utah and the U.S. Geological Survey jointly installed
new tools for delivering fast information for public safety if any
disruptive quakes occur during the Olympics.
The new, real-time earthquake system's key information product is a
ShakeMap ? a rapidly generated computer map, available within about 5
minutes of an earthquake, that gives an overview of the location, severity,
and extent of actual ground shaking, just like a Doppler radar image for a
weather disturbance. The information is sent to emergency managers and
appears on the web site www.quake.utah.edu or www.seis.utah.edu
Olympic venues in Wasatch Front valleys are chiefly at risk from damaging
shaking from a moderate to large earthquake of Richter magnitude 5 or
greater. Arabasz estimates there is a 1-in-3,500 probability of "the Big
One" ? a magnitude-7 or stronger quake ? on the Wasatch fault in or near
the Ogden-Salt Lake City-Provo corridor during the time period of the
Olympics and Paralympics.
Estimates indicate a magnitude-7.5 quake on the Salt Lake City segment of
the Wasatch fault could kill up to 7,600 people, injure 44,000 others and
cause about $12 billion in damage.
Moderate quakes are somewhat more likely. Arabasz says the probability of a
magnitude-5 or greater shock within the metropolitan corridor is about 1 in
1,700 during the Olympics or Paralympics.
Even minor to moderate earthquakes of magnitude 4 or more could endanger
alpine venues or their access roads by triggering avalanches or landslides.
The chance of such an earthquake occurring within 9 miles (15 kilometers)
of one of the alpine venues during the Olympic Winter Games is about
1-in-750, Arabasz says.
If the chance of a quake during the Olympics seems remote, consider what
happened during some other sporting events:
n In October 1989, a major quake measuring 6.9 in magnitude (initially
reported at 7.1) rocked the San Francisco Bay region during the third
baseball game of the World Series. A live television audience of millions
witnessed the direct effects of the earthquake shaking Candlestick Park.
That quake killed 63 people, injured more than 3,700 others and caused up
to $10 billion in damage.
n During the 1998 Winter Olympic Games in Nagano, Japan, a magnitude-5
quake rattled alpine skiers at the starting line, shook rooms in multistory
apartment buildings at Olympic Village, delayed bullet trains for two
hours, made floors shudder in the press center in Nagano and triggered a
landslide that blocked traffic.
n Less than two months later, in April 1998, a magnitude-4.5 quake in
Italy made bleachers sway in a soccer stadium in Gualdo Tadino, sending
1,500 panicked fans fleeing. Two were injured.
The usefulness of the new ShakeMap system is illustrated by what happened
in the first few hours following the 1989 World Series quake, which was
centered 60 miles southeast of San Francisco. Emergency responders had poor
information on where the strongest shaking and greatest damage actually
occurred. They depended unduly on news media reports to guide their
response actions, and overlooked for hours some hard-hit areas. ShakeMaps
can identify areas of strong shaking within minutes.
Arabasz and Nava realized in 1998 they might have to deal with a 2002
"Olympics earthquake" on their watch. They set out to find funding to build
a real-time earthquake information system in Utah, patterned after a $20
million state-of-the art system in southern California. Now that the basic
$1 million system is in place, Utah seismologists will be on duty seven
days a week around-the-clock during the Winter Games, just in case they
need to provide quick information on an earthquake.
Although installation of the earthquake monitoring system was accelerated
to be in place for the 2002 Olympic Winter Games, the primary motivation
was to provide for the long-term needs for earthquake safety in Utah's
dramatically growing Wasatch Front area. Similar efforts are underway in
other at-risk U.S. metropolitan areas under a program known as the Advanced
National Seismic System (ANSS). Authorized by Congress in 2000 and led by
the USGS, the ANSS plan calls for installation of over 6,000 sensors to
monitor earthquake shaking in 26 metropolitan areas across the United
States. ANSS is currently only about 5 percent completed, but substantive
progress has been made in a few select regions such as the Salt Lake City
metropolitan area, the Seattle-Tacoma region, and the San Francisco Bay
area.
In addition to the ANSS seed funding from the USGS, the University of Utah
also received help from the Union Pacific Foundation, the Utah Division of
Comprehensive Emergency Management, the Federal Emergency Management
Agency, and the Utah Geological Survey.
*****
The USGS serves the nation by providing reliable scientific information to
describe and understand the Earth; minimize loss of life and property from
natural disasters; manage water, biological, energy, and mineral resources;
and enhance and protect our quality of life.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 361 of 637: Marcia (MarciaH) * Wed, Jan 30, 2002 (21:46) * 3 lines
Several tiny quakes in Simi Valley... but they will make this topic enormous so I only post the batch from USGS lest we get buried.
Hi Cosmo! Welcome back - we missed you but have your place reserved for the party! College guys do that! I remmeber...
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 362 of 637: Curious Wolfie (wolf) * Wed, Jan 30, 2002 (21:55) * 1 lines
perfectly understandable---lot's of little ones all over the world!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 363 of 637: John Tsatsaragos (tsatsvol) * Wed, Jan 30, 2002 (22:43) * 6 lines
They must be very proud for that "Billion dollars, high level organization and very fast services of information". This is very useful for a quick estimation just after the event. I wonder if those statistic estimations for the possibilities of a catastrophe and for victims are really useful to peoples. Who can feel safer?
In any case, this a good step for the Emergency Management.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 364 of 637: Marcia (MarciaH) * Wed, Jan 30, 2002 (23:11) * 2 lines
I also had the same reaction - and I AM PAYING FOR THIS USELSS INFORMATION!
I nearly did not post this article from USGS. It is an embarrassment.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 365 of 637: Marcia (MarciaH) * Sat, Feb 2, 2002 (16:47) * 1 lines
Geo's back!!! I can breathe again!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 366 of 637: Paul Terry Walhus (terry) * Sat, Feb 2, 2002 (17:00) * 4 lines
Whew! It's a long story. You'll hear all about it.
Stay tuned.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 367 of 637: Marcia (MarciaH) * Sat, Feb 2, 2002 (17:03) * 1 lines
Thanks!!! Thanks to Kaylene, too. I'm certain she has also been busy. Take your time, Terry. We're back in action! Spin your saga when you have relaxed and enjoyed the fruits of your labors!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 368 of 637: Marcia (MarciaH) * Sat, Feb 2, 2002 (22:29) * 7 lines
Until we get Geo files so they update John's graphs, please see them at this location:
http://users.otenet.gr/~bm-ohexwb/invite/inviationGB.htm
Or for those of you who need a clickable link:
Graph update
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 369 of 637: Marcia (MarciaH) * Sun, Feb 3, 2002 (13:14) * 3 lines
The graph and bar chart for Greece looks to be quiet and this is comforting.
http://users.otenet.gr/~bm-ohexwb/invite/inviationGB.htm
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 370 of 637: _cosmo_ (aa9il) * Tue, Feb 5, 2002 (21:16) * 7 lines
Yea! Geo is back!
Soon midterms will be over and I'll have a wee bit
more free time! Hi all!
73 de Mike
aa9il
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 371 of 637: Curious Wolfie (wolf) * Tue, Feb 5, 2002 (21:20) * 1 lines
hi cosmo!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 372 of 637: Marcia (MarciaH) * Tue, Feb 5, 2002 (21:58) * 1 lines
Go Cosmo!!! Kick you-know-what and we'll see you on the other side of midterms.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 373 of 637: John Tsatsaragos (tsatsvol) * Wed, Feb 6, 2002 (10:58) * 52 lines
THE STORY OF A DEATHLY EQ
Final report by USGS National Earthquake Information Center is:
Date-Time: 2002 02 03 07:11:29.2 UTC
Location: 38.557N 31.116E
Depth: 10 kilometers
Magnitude: 5.7mb 6.5MS
Region: TURKEY
Result: 46 humans death, big numbers of injured persons while it caused total collapse even in ground floor buildings.
The epicenter was 722Km far of my station.
Precise azimuth direction of the real epicenter is 97 degrees, looking from my station.
Let us to see again the last graph of my signals.
You can see clearly the abrupt increase of the amplitude on January 30, with biggest amplitude of 8.66 mVolts that day.
This means that in a few days,
WILL BECOME A SIGNIFICANT EARTHQUAKE.
But, WHEN we must wait this EQ?
Come to see the mean daily tidal gravity variation graph for February 2002. The next three most dangerous days are the 3rd, 4th and 5th of February (Red bars).
This was proved absolutely precise as you can see on the above bar graph.
Also, we can say that
THIS EARTHQUAKE WAS THE MAIN
because the amplitude of 24-hour oscillation is decreased afterwards the earthquake.
On February 2, Dr. Thanassoulas (member our inquiring team) found the azimuth direction at 93 degrees, after process on my signals. It was about the same result of my process. That is to say almost easterly concerning my station. (The precise azimuth direction of the real epicentre was 97 degrees).
On the above map the blue-red arrow shows the azimuth direction that was calculated on February 2.
I will close this presentation with the following bar graph.
Here is the relationship between signals and EQ's for the last 3 big EQ's around my station. Fourth column indicates the amplitude of my signals during the past 24 hours. This graph is updated every day as well.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 374 of 637: Marcia (MarciaH) * Wed, Feb 6, 2002 (13:23) * 5 lines
Splendid work, John! I am full of admiration for you. This Quake happened quite far from your station in Volos. Is this the greatest distace at which you detected signals of which you were later able to prove the origin? Let me rephrase that question..... was this the greatest distance from your monitors for which you were able to redict and Earthquake?
You do need more stations. I know two people ready to turn their substrates into seismic monitoring stations for you!
Get well soon! We're all holding hands with you for strength!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 375 of 637: Marcia (MarciaH) * Wed, Feb 6, 2002 (13:27) * 1 lines
The danger period of tidal effects is very important. Thank you for your new bar chart. I can actually understand this. A rise in Amplitude of both the signals and the bar chart is usually a good reason to be extra vigilant.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 376 of 637: Curious Wolfie (wolf) * Wed, Feb 6, 2002 (19:19) * 1 lines
wow, john!!! *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 377 of 637: John Tsatsaragos (tsatsvol) * Fri, Feb 8, 2002 (07:24) * 6 lines
You ask me if this is the greatest distance Marcia.
I will explain. As bigger is the magnitude of the oncoming EQ, too bigger is the amplitude of produced signals. Recording signal is that arrives in my station and it is less, as distance is bigger. The signal traveling in the ground reduces its power by the resistance of the rocks. But, if it is to occur an EQ with magnitude 7.0+R, the signal must be perceivable in bigger distance or amplitude of the signal must be higher for the same distance.
It isn’t enough 700Km for one station? It sounds magic and unbelievable, but it is true.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 378 of 637: Marcia (MarciaH) * Fri, Feb 8, 2002 (20:08) * 3 lines
Your research is truly monumental, John. My admiration is boundless. I suspected the wave magnitude would have a factor of distance in it. It does with sound waves. and, I imagine, the entire Electro-magnetic spectrum.
Congratulations!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 379 of 637: John Tsatsaragos (tsatsvol) * Sun, Feb 10, 2002 (03:50) * 8 lines
The theory of emission and reception of electromagnetic waves defines that the receiving signal is proportional to Reverse Square of distance. But this is effect for one electric dipole. That is to say for source of point.
However the source of pre-earthquake signals is three dimensional with big volume. For this reason is not precise the theoretical approach. It is as big number of dipoles outspreaded in the area of the fault where they exist high pressures already.
We need an enough number of earthquakes in order to find an empirical formula.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 380 of 637: Marcia (MarciaH) * Sun, Feb 10, 2002 (14:50) * 1 lines
Alas, I cannot create earthquakes for you. Have you ever taken any of your sensors to a quarry when they are dynamiting? I notice that some small California EQs are noted as being near quarries and probably are due to blasting in the area. We also need to get those other two stations feeding you data for your calculations. I am excited to share this experience with you, John! My enthusiasm is boundless!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 381 of 637: Marcia (MarciaH) * Mon, Feb 11, 2002 (22:05) * 0 lines
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 382 of 637: Marcia (MarciaH) * Mon, Feb 11, 2002 (22:06) * 4 lines
John's signals are building up again. I suspect an earthquake in the near future.
Terry, we need you to enable us to ftp. Otherwise we need to see his graphs at this url
http://users.otenet.gr/~bm-ohexwb/invite/inviationGB.htm
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 383 of 637: Curious Wolfie (wolf) * Tue, Feb 12, 2002 (16:49) * 1 lines
i'm with you marcia!! hold on john!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 384 of 637: Marcia (MarciaH) * Tue, Feb 12, 2002 (16:54) * 1 lines
John assures me that when he built his house, he engineered it to be safe. I know he has the knowledge to do this. I also know he is a good provider for his family and has built them a safe haven. Still, I worry, but that is because I care, as do we all!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 385 of 637: Curious Wolfie (wolf) * Tue, Feb 12, 2002 (16:56) * 1 lines
but one of those on his chart was for an EQ in Turkey. so this next one might just be in the Mediterranean, right? (i cannot spell today)
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 386 of 637: Marcia (MarciaH) * Tue, Feb 12, 2002 (17:01) * 1 lines
Yes! In Greece. His chart for Greece is particularly important!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 387 of 637: Curious Wolfie (wolf) * Tue, Feb 12, 2002 (17:04) * 1 lines
i thought that's what i looked at...hmmmmmmm........
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 388 of 637: Marcia (MarciaH) * Tue, Feb 12, 2002 (17:05) * 3 lines
This one in particular - his Greek signal chart:
Greece EQ
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 389 of 637: Curious Wolfie (wolf) * Tue, Feb 12, 2002 (17:17) * 1 lines
yup, that's the one i looked at--and turkey's on there.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 390 of 637: Marcia (MarciaH) * Tue, Feb 12, 2002 (17:52) * 1 lines
Turkey's quake was so much a part of his substrate that even his localized monitors picked it up! Otherwise he monitors world-wide seismic activity on another graph. That on is really just for local Greece earthquakes! We both suspect strongly that it was on the Great Anatolian Fault. I'll find a graphic of this historically important fracture in the earth's crust.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 391 of 637: Curious Wolfie (wolf) * Wed, Feb 13, 2002 (18:40) * 1 lines
well, it was pretty big so i guess so! *laugh* thanks for the clarification!!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 392 of 637: Marcia (MarciaH) * Sun, Feb 17, 2002 (12:45) * 5 lines
In the interest of keeping topic 67 for John's earthquake predicting research, I hope we will use this topic to welcome his new topic. Topic 67 will be linked to his website and, as soon as we are again able to use FTP, will be updated and kept current.
Welcome John! You honor us with your expertise and time. I am totally captivated by your work and how brilliant you are in creating the electronics necessary to do this most important work. What could be more noble than to work to save lives?!
*HUGS* and thanks for creating this topic.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 393 of 637: Marcia (MarciaH) * Sun, Feb 17, 2002 (13:26) * 18 lines
The reason for all those quakes along the southern and eastern borders of Greece
http://www.ipgp.jussieu.fr/~lacassin/WebTecto/rech/tectorecherche/IzmitWEB/Quakes1781999UK.gif
To earth scientists, the Aegean Sea and the surrounding land areas have one of
the most complex and fascinating tectonic stories of any place on Earth. The
movements of the Earth's crust known as plate tectonics are conspiring to
squeeze the Anatolian plate westward. The motion is mostly concentrated along
major faults through the Marmara and the Northern Aegean. At the same time,
the eastern Mediterranean is being subducted along the Hellenic Arc and beneath
the Southern Aegean. The coupling between these two tectonic systems has
produced a complex distribution of crustal faults and surface deformation that has
been responsible for devastating earthquakes throughout the Aegean region. If
we are to make progress in protecting society from earthquake disasters, we
must understand the very basis of tectonic activity in the Aegean, the Marmara,
and the surrounding areas.
http://www.earthinstitute.columbia.edu/news/aboutStory/about8_1_01.html
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 394 of 637: Marcia (MarciaH) * Sun, Feb 17, 2002 (13:38) * 7 lines
Even better is the website of Dr Thanassoulas, colleague and collaborator with John in his research. Dt Thanassoulas is a geophysicist at the Greek Institute of Geology & Mineral Exploration in Athens.
http://users.otenet.gr/~thandin/tectonic_setting.htm
John, Dr Thanassoulas' new webpage is wonderful. I have never seen a menu quite like the one they are using. The data sent by John is analyzed and posted
http://users.otenet.gr/~thandin/fieldcurrentstatus.htm
Check the side menu for individual graphs.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 395 of 637: John Tsatsaragos (tsatsvol) * Mon, Feb 18, 2002 (10:42) * 6 lines
You honor me with your acceptation. I cannot find applicable words in order to thank you as I want. I respect all of you and I will be happy if I can add something useful here. I believe that my research is mature and I share it with pleasure. I hope that my attempt will become a chance to save human lives.
Thank you again deeply of my heart.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 396 of 637: Marcia (MarciaH) * Mon, Feb 18, 2002 (17:15) * 3 lines
John, Your presence deserves our thanks. I condsider your research VERY important, as do other geologists and world-wide insurers of saftety. *HUGS*
Without other posters, I am left to offering the bits and pieces of my experiences which may or may not be interesting to others.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 397 of 637: Curious Wolfie (wolf) * Mon, Feb 18, 2002 (19:20) * 1 lines
I'm with Marcia on that one, we are glad to have you among us, John! And even though I don't understand half the stuff being talked about, I find it interesting and will ask questions on behalf of the lurkers out there! *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 398 of 637: Marcia (MarciaH) * Mon, Feb 18, 2002 (19:37) * 1 lines
Wolfie, where would we be without you? Please don't ever think of leaving. *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 399 of 637: Curious Wolfie (wolf) * Mon, Feb 18, 2002 (19:50) * 1 lines
no plans to leave spring! (did you get my email?) *HUGS*
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 400 of 637: John Tsatsaragos (tsatsvol) * Tue, Feb 19, 2002 (01:25) * 3 lines
I will say one more time that none is pundit here. Much more, that none know everything. We simply share what we know. Every thought, every opinion and every question are acceptable here. WE ARE SIMPLE EVERYDAY PEOPLE.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 401 of 637: wayne alison (maggit) * Tue, Feb 19, 2002 (05:07) * 1 lines
+so whats the chat about then-
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 402 of 637: Marcia (MarciaH) * Tue, Feb 19, 2002 (12:02) * 3 lines
Wayne, Aloha and welcome! Here we discuss the prediction and problems associated with earthquakes. John's research has moved to Geo 67 so it would not be buried under a lot of posts of other information. I am in Hawaii on the flank of the world's most active volcano. Earthquakes are a fact of life to me. Are you in a seismic area? Please share your experiences with us. I post earthquake data in Geo 26.
Again, Welcome!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 403 of 637: John Tsatsaragos (tsatsvol) * Tue, Feb 19, 2002 (12:50) * 7 lines
Welcome Wayne
I try to say that in the discussion they are acceptable all, any knowledge if has each one. Perhaps my reports here resemble very scientific. I am afraid that this fact can avert someone to join our discussion. I would be happy to discuss any query and to hear your opinion. I hope that you will find some interest here.
Welcome again!
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 404 of 637: Curious Wolfie (wolf) * Tue, Feb 19, 2002 (17:50) * 1 lines
hi wayne!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 405 of 637: Marcia (MarciaH) * Tue, Feb 19, 2002 (21:44) * 3 lines
John's signals seem to be repeating the activity just before the Skyros earthquake. Greece will have one soon. Pray it is also in the sea.
http://users.otenet.gr/~bm-ohexwb/invite/inviationGB.htm
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 406 of 637: John Tsatsaragos (tsatsvol) * Wed, Feb 20, 2002 (03:56) * 5 lines
You can find my signals also in topic 67 Marcia.
My daily updated graphs are there too. I hope that they are easy understandable. If they are not understandable to someone, please let me know. I will explain.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 407 of 637: Marcia (MarciaH) * Wed, Feb 20, 2002 (12:06) * 4 lines
Thank you, John! Soon I hope you will be able to use the Spring link again.
I meant the Dodecanese Island quake pre-pattern, and not Skyros.
I am looking at the other data charts which also need to be taken in to consideration. This is so fascinating to watch. I find it like peeking over God's shoulder. It is exciting and more than a little unsettling to know we can see a little into the future - no matter how dimly. Keep up the goood work.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 408 of 637: _cosmo_ (aa9il) * Thu, Feb 21, 2002 (14:42) * 10 lines
Howdy all
Back again after a couple of weeks of foolishness - anyway, it was nice
to read up on the previous postings and also visit John's web site. Anyway,
getting back into the swing of thing so hopefuly will be able to post something
of interest in the not to distant future.
peace
Mike de AA9I
r-c-i
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 409 of 637: Marcia (MarciaH) * Thu, Feb 21, 2002 (17:09) * 5 lines
Aloha Mike and Big Geo *HUGS*
You've got a new poster in Geo 34 I think you will find really interesting. John has been entertaining him. Take a look!
It is so good to have you back, and delighted to hear you had some foolishness to break up the academic grind. Come back any time. Your pipe and easy chair await you beside the fire.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 410 of 637: _cosmo_ (aa9il) * Fri, Feb 22, 2002 (09:10) * 11 lines
Hi Marcia and Geoites
Yep, saw Shawns posting and we will have plenty to blab about - plus I
checked out some of the VLF/ELF/SLF pages and got some design ideas.
Just the kind of stuff to break the ennui and get back to REAL work
with a purpose (of course my silly work does pay the rent...) Off
to go get some ferrite and some low noise operational amplifiers!
73 de AA9IL
Mike
radio cosmo international
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 411 of 637: John Tsatsaragos (tsatsvol) * Fri, Feb 22, 2002 (09:43) * 9 lines
Hello friends,
You can see on my updated graphs (topic 67) what was seeing Marcia on them. Just like over God's shoulder as she says.
What amazing words Marcia! Who says that you are not a poet too?
I underline the time of occurring these earthquakes. Just inside the most dangerous days window! Its epicenter was on the calculated azimuth direction too. I hope that they are not foreshocks. We will see the next days.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 412 of 637: John Tsatsaragos (tsatsvol) * Fri, Feb 22, 2002 (10:28) * 8 lines
Welcome again Mike.
It appears that my system works well and has very good sensitivity unexpectedly. Also our methodology is proved successful. We cannot prove any possible theory (it must cooperate more than one sciences for it) but the positive results are something more than hopeful.
Good success for your work
Regards
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 413 of 637: Marcia (MarciaH) * Fri, Feb 22, 2002 (12:25) * 4 lines
John, You have enabled my being able to see into the future. It is you who are the poet of creation on Earth. First, I watched the dawn of day over a fountaining volcano (picture in Geo 2 - a very early post) which had every bit of being with God at the moment of creation. I watched for many months. A deep pit became a hill, eventually, and new topographic feature was named and placed on new maps made to accommodate this change. Not everyone gets to see these things, and I feel very privileged to have been able to do this.
Now, John has enabled us all to peek over Gaia's shoulder as she rearranges her plates and lets mankind know he is not a s all-powerful as he thinks he is.
*HUGS* John, for enabling us. I am both thrilled and humbled by your genius!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 414 of 637: Curious Wolfie (wolf) * Fri, Feb 22, 2002 (19:07) * 1 lines
mike, how'd your tests go?
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 415 of 637: John Tsatsaragos (tsatsvol) * Mon, Feb 25, 2002 (10:02) * 12 lines
Hi friends
Previous increase of my signals was from this seismic activity.
2002 FEB 21 08 40 41.9 36.76 21.64 34 3.9Ml OR 4.4Ms
2002 FEB 21 09 15 8.3 38.39 21.77 5 3.6 Ml OR 4.1Ms
2002 FEB 21 18 20 44.7 38.36 21.76 5 3.9 Ml OR 4.4Ms
(To convert Ml units to Ms units simply add 0.5).
All of them were in about the same azimuth direction from my station.
Now, you can see a new interesting increase of my signals. I hope that they will not increase more until the next dangerous time window. Azimuth direction of the source is similar to an older one.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 416 of 637: Marcia (MarciaH) * Mon, Feb 25, 2002 (11:22) * 1 lines
Welcome back, John! I am with you in your hopes that the increase of signals does not happen until after the next danger period is past. I'd like to wish for never an increase in signal strength, but that is unreasonable on this restless Earth. You and Dr Thanassoulas had the azimuth precisely figured. My congratulations on your continuing predicting skills.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 417 of 637: Marcia (MarciaH) * Tue, Feb 26, 2002 (20:36) * 1 lines
John, our FTP is working again. Please update your graphs here when you have time. I will fpt your folder of images you created and sent to me yesterday.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 418 of 637: John Tsatsaragos (tsatsvol) * Tue, Feb 26, 2002 (22:33) * 4 lines
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 419 of 637: Marcia (MarciaH) * Tue, Feb 26, 2002 (22:45) * 1 lines
Oh John! How perfect your post is. I adore your graphic and look forward to Greece doing Very Well in gymnastics with the new coach they have instructing them. Please do not lose this. We will need it again!
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 420 of 637: Marcia (MarciaH) * Tue, Feb 26, 2002 (22:57) * 5 lines
John has been able to update his graphs at geo again.
http://tvnight.org/yapp-bin/restricted/read/Geo/67.2
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 421 of 637: Mike Kana (aa9il) * Wed, Feb 27, 2002 (15:09) * 7 lines
Hi all
Cool graphs! Also, to respond to Wolfies question a while back
yep, the test went fine. Only a couple more weeks to go!
73 de AA9IL
Mike
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 422 of 637: Marcia (MarciaH) * Wed, Feb 27, 2002 (16:26) * 1 lines
Let us know when, and we will get out the beer and whatever they use worldwide to celebrate such occasions. John, reserve us a seaside Taverna for the occasion. And a place to let Mike recover the next day. Probably a rocking boat is not the best idea though it appeals to me.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 423 of 637: John Tsatsaragos (tsatsvol) * Fri, Mar 1, 2002 (10:32) * 9 lines
Hello,
I would like to remind you that you could follow recent pre-earthquake activity for Greece in topic 67 or you can
CLICK HERE.
Both, are updated every day!
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 424 of 637: Marcia (MarciaH) * Fri, Mar 1, 2002 (12:55) * 3 lines
This is Magnificent new "invitation to predict" page, John has created. He is absolutely brilliant in the creation graphics. Poetic, too.
*Hugs* I was hoping you would post the march danger window chart. The current signals for Greece are puzzling. The seem to be precursors for a greater quake elsewhere, but I do not have past ones with which to compare them. This being the case, I will keep my predictions to myself, but I do think something near Greece is soon to occur. How soon? That is the difficult part. I suspect it might be within the next week.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 425 of 637: John Tsatsaragos (tsatsvol) * Fri, Mar 1, 2002 (21:08) * 23 lines
Hi friends
I think that last increment of my signals it was from the EQ activity at the East of Island Crete. It was reported:
2002/02/24 05:32:50.8 37.4N 22.8E mb4.3 A MAD SOUTHERN GREECE
2002/02/24 05:32:16.7 35.1N 26.9E MD4.5 M NOA CRETE, GREECE
2002/02/24 05:32:07.9 34.9N 26.8E 10G Mb4.4 A MIX CRETE, GREECE
2002/02/24 05:32:04.9 34.8N 27.2E 10 Mb4.6 A LDG EASTERN MEDITERRANEAN SEA
2002/02/24 05:31:48.3 33.3N 27.7E 10G Ml4.8 A INGV EASTERN MEDITERRANEAN SEA
2002/02/24 05:31:33.2 33.6N 29.7E 10G Ml5.0 A INGV EASTERN MEDITERRANEAN SEA
(All of the above reports are for the same EQ by several stations)
By EMSC-CSEM
OR
2002 FEB 24 05 32 21.7 35.40 26.57 37 4.2 Ml or 4.7Ms
2002 FEB 27 23 24 27.4 35.48 25.97 10 4.0 Ml or 4.5Ms
By National Institute of Geodynamics of Athens
Azimuth direction of my signals indicates to this area. Max amplitude of my signals was 7.98 mV on 24th of February. Compared to my signals of the previous EQ at Dodecanesese Islands (M=6.3R, at about the same area) it matches well.
John
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 426 of 637: Marcia (MarciaH) * Sat, Mar 2, 2002 (13:44) * 1 lines
Thank you for the GEIN NOA link. Prior to this, Netscape would not open my bookmark. I appreciate one that does! I have emboldened the Greek quakes on the daily QED posts at Geo 26 and did notice many 3+ and several 4+ magnitude events. Crete and earthquakes and history have gone hand in hand through recorded time. I suspect it will continue to be so.
Topic 9 of 92 [Geo]: Seismology: Earthquakes - The Science and Updates on Current Activity
Response 427 of 637: John Tsatsaragos (tsatsvol) * Wed, Mar 6, 2002 (23:31) * 3 lines
TEST