Magnitude 7.6 quake hits off India's Andaman Islands

Reuters ^ | 08/10/2009 | n/a

[Pyro7480]

A massive magnitude 7.6 quake struck in the Indian Ocean off India's Andaman Islands, triggering a tsunami watch for India, Myanmar, Indonesia, Thailand and Bangladesh, the U.S. Geological Survey reported on Monday.

The USGS said the quake, initially reported as a magnitude 7.7, was 20.6 miles deep and was centered 160 miles north of Port Blair in the Andaman Islands.

[Pyro7480]

Heads-up

[mnehring]

One in Tokyo just now.. we have some plate action going down.

[Carpe Cerevisi]

Oh snap!

[NoObamaFightForConservatives]

They’re will be earthquakes in divers places.

[NoObamaFightForConservatives]

[The Magical Mischief Tour]

surfs up!

[ohioWfan]

Rats

Thanks for posting.

[NoObamaFightForConservatives]

http://www.prh.noaa.gov/ptwc/

[EDINVA]

oh, great. My daughter is in India, but in Delhi, so probably somewhat safe.

[NoObamaFightForConservatives]

http://www.prh.noaa.gov/ptwc/messages/indian/2009/indian.2009.08.10.200514.txt

[lainie]

The 12/26/2004 quake was upgraded to Mw= 9.3

link

[lainie]

Other locked thread (maps & info posted with links)

http://www.freerepublic.com/focus/f-news/2312789/posts

[Oldeconomybuyer]

SKY News: A tsunami watch has been issued across the Indian Ocean after a magnitude 7.6 earthquake, while a second tremor caused buildings to shake in Japan.

[EDINVA]

Thanks. Delhi’s about as far from the Andamans as possible and still be in India. Am assuming she hasn’t taken a side trip this week. Was in Goa last week, so maybe just staying in Delhi for a few days.

[NoObamaFightForConservatives]

Yeah another Japan quake. Wow. I would not want to live in Ca.

[NoObamaFightForConservatives]

Yeah another Japan quake. Wow.

[Loud Mime]

TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 2005Z 10 AUG 2009

THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN.

... A REGIONAL TSUNAMI WATCH IS IN EFFECT ...

A TSUNAMI WATCH IS IN EFFECT FOR

INDIA / MYANMAR / INDONESIA / THAILAND / BANGLADESH

FOR OTHER AREAS OF THE INDIAN OCEAN REGION...THIS MESSAGE IS FOR
INFORMATION ONLY AT THIS TIME.

THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES. ONLY
NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
ANY ACTIONS TO BE TAKEN IN RESPONSE.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 1956Z 10 AUG 2009
COORDINATES - 14.1 NORTH 93.0 EAST
LOCATION - ANDAMAN ISLANDS INDIA REGION
MAGNITUDE - 7.7

EVALUATION

EARTHQUAKES OF THIS SIZE HAVE THE POTENTIAL TO GENERATE A
DESTRUCTIVE LOCAL TSUNAMI AND SOMETIMES A DESTRUCTIVE REGIONAL
TSUNAMI ALONG COASTS LOCATED USUALLY NO MORE THAN A THOUSAND
KILOMETERS FROM THE EARTHQUAKE EPICENTER. AREAS FURTHER FROM THE
EPICENTER COULD EXPERIENCE SMALL SEA LEVEL CHANGES AND STRONG OR
UNUSUAL COASTAL CURRENTS.

HOWEVER - IT IS NOT KNOWN THAT A TSUNAMI WAS GENERATED. THIS
WATCH IS BASED ONLY ON THE EARTHQUAKE EVALUATION. AUTHORITIES IN
THE REGION SHOULD TAKE APPROPRIATE ACTION IN RESPONSE TO THIS
POSSIBILITY. THE WATCH WILL NOT EXPAND TO OTHER AREAS OF THE
INDIAN OCEAN UNLESS ADDITIONAL DATA ARE RECEIVED TO WARRANT SUCH
AN EXPANSION.

ESTIMATED INITIAL TSUNAMI WAVE ARRIVAL TIMES AT FORECAST POINTS
WITHIN THE WARNING AND WATCH AREAS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR.

LOCATION FORECAST POINT COORDINATES ARRIVAL TIME
———————————————— —————— ——————
INDIA NORTH ANDAMAN 13.3N 92.6E 2021Z 10 AUG
LITTLE ANDAMAN 10.7N 92.3E 2053Z 10 AUG
PORT BLAIR 11.9N 92.7E 2121Z 10 AUG
GREAT NICOBAR 7.1N 93.6E 2136Z 10 AUG
KAKINADA 17.2N 82.7E 2205Z 10 AUG
BALESHWAR 21.6N 87.3E 2231Z 10 AUG
MYANMAR PYINKAYAING 15.9N 94.3E 2047Z 10 AUG
CHEDUBA ISLAND 18.9N 93.4E 2100Z 10 AUG
SITTWE 20.0N 92.9E 2135Z 10 AUG
MERGUI 12.8N 98.4E 2243Z 10 AUG
YANGON 16.5N 96.4E 2321Z 10 AUG
INDONESIA BANDA ACEH 5.5N 95.1E 2204Z 10 AUG
THAILAND PHUKET 8.0N 98.2E 2244Z 10 AUG
KO PHRA THONG 9.1N 98.2E 2257Z 10 AUG
KO TARUTAO 6.6N 99.6E 0012Z 11 AUG
BANGLADESH CHITTAGONG 22.7N 91.2E 2340Z 10 AUG

ADDITIONAL BULLETINS WILL BE ISSUED BY THE PACIFIC TSUNAMI
WARNING CENTER FOR THIS EVENT AS MORE INFORMATION
BECOMES AVAILABLE.

THE JAPAN METEOROLOGICAL AGENCY MAY ISSUE ADDITIONAL INFORMATION
FOR THIS EVENT. IN THE CASE OF CONFLICTING INFORMATION...THE
MORE CONSERVATIVE INFORMATION SHOULD BE USED FOR SAFETY.

[pgkdan]

bump

[Joe 6-pack]

Barack Obama hates red people.

[Spartan79]

Good pictorial representation of recent worldwide quake activity can be found at RedPuma:

http://www.seismo.ethz.ch/redpuma/maps/worldmap.html

[Deo volente]

There was a 6.9 off the coast of Baja California one week ago.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/us2009jwbh.php

[djf]

Bump!

[bd476]

Earthquake Ping List

This time I also pinged some people who are not on the Earthquake Ping List. If I pinged you by mistake, my apologies.

If you wish to be removed from the Earthquake Ping List or added to it, please FReepmail me.

Estimated Population Exposed to Earthquake Shaking
Est. Modified *Estimated exposure only includes population within the map area.

Overall, the population in this region resides in structures that are highly vulnerable to earthquake shaking, though some resistant structures exist.

On September 13, 2002 (UTC), a magnitude 6.5 earthquake occurred in the India region 112 km south of the location of this earthquake, with estimated population exposures of 4,000 at intensity VIII and 20,000 at intensity VII, resulting in an estimated 2 fatalities.

Population Exposure
Estimated Population Exposed to Earthquake Shaking
Population per ˜1 square km from Landscan 2005

Selected City Exposure

MMI City Population

IV Bamboo Flat 7k
IV Port Blair 112k
IV Pathein 237k
IV Mawlamyinegyunn 39k
IV Bogale 68k
IV Wakema 42k
IV Pyapon 65k
IV Kyaiklat 52k
III Maubin 51k
III Twante 46k

WP 7.6 (GS).
Tectonic Summary


The Andaman Islands earthquake of August 10, 2009, occurred in the boundary region of India plate and the Burma plate, near the north end of the rupture zone associated with the great Sumatra—Andaman earthquake of December 26, 2004.

Early analysis of seismographic data implies that the earthquake occurred as the result of normal faulting on a north-northeast or northeast trending fault plane.

This style of faulting is consistent with the earthquake occurring as a result of stresses generated by bending of the India plate as it subducts beneath the Burma plate.

The August 10 earthquake was therefore an intraplate earthquake, in contrast to the great 2004 earthquake, which was an interplate thrust-fault earthquake on the interface between the India plate and the Burma plate.

Although the style of faulting that caused the August 10, 2009 earthquake differs from the style of faulting that caused the great 2004 earthquake, it is possible that changes in regional tectonic strain-field caused by the 2004 earthquake made conditions more favorable for the occurrence of the 2009 earthquake than would otherwise have been the case. It is noteworthy that in the days immediately following the 2004 earthquake there were a large number of normal-faulting earthquakes in the subducted India plate of the Andaman Islands region.

The largest Andaman Islands intraplate normal-fault earthquake in the immediate aftermath of the 2004 earthquake was more than an order of magnitude smaller than the August 10, 2009, earthquake.

Time of Earthquake in Other Zones:

Monday, August 10, 2009 at 03:55:39 PM (AST) - Atlantic Standard (San Juan)
Monday, August 10, 2009 at 03:55:39 PM (EDT) - Eastern Daylight (New York, Toronto)
Monday, August 10, 2009 at 02:55:39 PM (CDT) - Central Daylight (Winnipeg, Chicago, Mexico City)
Monday, August 10, 2009 at 01:55:39 PM (MDT) - Mountain Daylight (Calgary, Denver Mazatlan)
Monday, August 10, 2009 at 12:55:39 PM (MST) - Mountain Standard (Phoenix)
Monday, August 10, 2009 at 12:55:39 PM (PDT) - Pacific Daylight (Vancouver, Los Angeles, Tijuana)

USGS Magnitude 7.6 - ANDAMAN ISLANDS, INDIA REGION

[Cindy]

Thank you for the ping bd476.

Godzilla - ping.

[bd476]

You're welcome, Cindy!

[Rushmore Rocks]

Thanks for the ping. I just happen to be an earthquake “junkie”.

[bd476]

You're welcome Rushmore Rocks!

[JesusBmyGod]

Please add me to your ping list. Thanks.

[bd476]

Argh! That 136.57 KB (139843 bytes) animated graphic from armageddononline.org is slowing my already very slow computer down to a crawl. Please ask someone to remove it.

[Godebert]

Interesting link. This shows that the 12/26/04 quake was three times as powerful as previously thought and the 2nd largest since seismographic measurements have been kept.