7.7 Quake Strikes Indonesia (Magnitude updated)

7.5 (Preliminary magnitude — update expected within 15 minutes)
Date-Time

* Monday, October 25, 2010 at 14:42:25 UTC
* Monday, October 25, 2010 at 09:42:25 PM at epicenter

Location 3.100°S, 100.200°E
Depth 33 km (20.5 miles) set by location program
Region KEPULAUAN MENTAWAI REGION, INDONESIA
Distances

* 240 km (149 miles) S (184°) from Padang, Sumatra, Indonesia
* 241 km (150 miles) WNW (288°) from Bengkulu, Sumatra, Indonesia
* 416 km (259 miles) WSW (246°) from Jambi, Sumatra, Indonesia
* 634 km (394 miles) SW (220°) from SINGAPORE

Location Uncertainty Error estimate not available
Parameters NST= 29, Nph= 29, Dmin=322.9 km, Rmss=1.06 sec, Gp= 90°,
M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=1
Source

* West Coast and Alaska Tsunami Warning Center/NOAA/NWS
earthquake.usgs.gov...

Picking up on twitter that tsunami warnings have already been issued in sumatra

Whoa... Now that's a quake.
Hope it didn't hurt anyone....

*added* -- SAME Area that the 9.3 hit in 2004 (causing that horribly deadly Tsunami)

A strong earthquake has occurred, but a tsunami IS NOT expected along the California, Oregon, Washington, British Columbia, or Alaska coast. NO tsunami warning, watch or advisory is in effect for these areas.

wcatwc.arh.noaa.gov...

THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN. ... A LOCAL TSUNAMI WATCH IS IN EFFECT ... A TSUNAMI WATCH IS IN EFFECT FOR INDONESIA

www.weather.gov...

hisz.rsoe.hu...

it shows you the location on google maps along with a load of other info

I picked this up in GEE, and watching it come in, the duration of this quake is enormous! Like MINUTES!

Any tsunami generated that close to their coast would have hit by now probably...

Not looking good for indonesia for the past few days... Mount Merapi is on high alert and according to the latest reports, it's on the brink of eruption... now this and the high possibility of tsunami... Not good!

Not seeing this on IRIS as of 8:20am PST. There is however a 5.7 in that area.

2nd line and stuff.

and.. no sooner I post this and check my link.. blam.. 7.5

US monitor: 7.5-magnitude quake hits off Indonesia
The Associated Press, Jakarta | Mon, 10/25/2010 10:15 PM | Archipelago
A | A | A |

A strong earthquake has hit off the western coast of Indonesia's Sumatra island and triggered a tsunami watch.

The U.S. Geological Survey says the 7.5-magnitude temblor struck at a depth of 20 miles (30 kilometers) and is centered on a small island off the coast of Sumatra, where a massive earthquake and tsunami hit in 2004.

A tsunami watch was issued for Indonesia, saying waves were possible within a few hundred miles (kilometers) of the epicenter.

However, the Pacific Tsunami Warning Center said historical data suggest any wave it created would not be destructive.

www.thejakartapost.com...

Depth 14.2 km (8.8 miles) set by location program


8.8 Miles... That's shallow. I expect a small Tsunami from this... maybe a few feet.
I worry about stronger aftershocks.. That area is SO dangerously sensitive..

000
WEIO21 PHEB 251449
TSUIOX

TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 1449Z 25 OCT 2010

THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN.

... A LOCAL TSUNAMI WATCH IS IN EFFECT ...

A TSUNAMI WATCH IS IN EFFECT FOR

INDONESIA

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 - 1442Z 25 OCT 2010
COORDINATES - 3.1 SOUTH 100.1 EAST
DEPTH - 33 KM
LOCATION - SOUTHERN SUMATRA INDONESIA
MAGNITUDE - 7.5

EVALUATION

A DESTRUCTIVE WIDESPREAD TSUNAMI THREAT DOES NOT EXIST BASED ON
HISTORICAL EARTHQUAKE AND TSUNAMI DATA.

HOWEVER - THERE IS THE POSSIBILITY OF A LOCAL TSUNAMI THAT
COULD AFFECT COASTS LOCATED USUALLY NO MORE THAN A HUNDRED
KILOMETERS FROM THE EARTHQUAKE EPICENTER. AUTHORITIES FOR THE
REGION NEAR THE EPICENTER SHOULD BE AWARE OF THIS POSSIBILITY.
AREAS FURTHER FROM THE EPICENTER COULD EXPERIENCE SMALL SEA
LEVEL CHANGES AND STRONG OR UNUSUAL COASTAL CURRENTS.

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
-------------------------------- ------------ ------------
INDONESIA SIBERUT 1.5S 98.7E 1510Z 25 OCT
BENGKULU 3.9S 102.0E 1527Z 25 OCT
PADANG 0.9S 100.1E 1528Z 25 OCT

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.
...SP...


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
-------------------------------- ------------ ------------
INDONESIA SIBERUT 1.5S 98.7E 1510Z 25 OCT
BENGKULU 3.9S 102.0E 1527Z 25 OCT
PADANG 0.9S 100.1E 1528Z 25 OCT

It might only be a 7.2, but there may be a correlation with a Volcano as well.

www.theglobeandmail.com...

definitely worth a watch today.

Keeping an eye on this this. Thanks fro sharing.

I am truly hoping this is not a foreshock!!

In related news:

High alert for Indonesia's Merapi volcano
25 October 2010 Last updated at 10:56 ET
www.bbc.co.uk...

Indonesia: Volcano Could Erupt at Any Time
By AP / SLAMET RIYADI Monday, Oct. 25, 2010
www.time.com...

Magnitude M 5.2
Region SOUTHWEST OF SUMATRA, INDONESIA
Date time 2010-10-25 15:21:06.0 UTC
Location 3.65 S ; 99.57 E
Depth 2 km
Distances 298 km W Bengkulu (pop 309,712 ; local time 22:21 2010-10-25)
269 km SW Sungaipenuh (pop 95,913 ; local time 22:21 2010-10-25)

EMSC





According to RSOE EDIS there were two EQ back to back, both being 7.5 mag, and one being at a depth of 14 km, while the other was at a depth of 33 km.

Well, I don't think it takes a highly intelligent person to look at the obvious question here. How does this 7.7 quake affect a large volcano about to burst? Are these connected....or possibly is there some connection unti now unknown between the volcano and fault? IS this a foreshock to something bigger and nastier involving the volcano? What kind of impact would this have locally and/or globally?

Inquiring minds want to know.....

UPDATE: This quake was updated to a 7.7 by the USGS:

earthquake.usgs.gov...

And seeing it myself come in on GEE, I am not surprised. It was a monster, and the whole earth is still shaking from it.

Well, that's gonna be the big quake activity probably for weeks or months. The earth always seems to rest from real big ones after this much release of energy.

(unless it is a foreshock- which I doubt).

ETA: westcoast... who knows? Except for the people with access to the local seismos. Merapi was going to go anyway- they are evacuating 40,000 people- so this couldn't help any, unless it happened to plug a hole in the volcano, I suppose.

Merapi thread:
www.abovetopsecret.com...

powerful aftershock occurring now... I'll guess around 5.8 to 6.3

Should be about 19:38 or so


was a 6.1

earthquake.usgs.gov...

Not too shabby a guess.... I guess...

reply to post by TrueAmerican


2010-10-25 19:37:32.3 Mw 6.3 KEP. MENTAWAI REGION, INDONESIA

Source


USGS has it at a 6.1