Magnitude 9.0 Earthquake - OFF THE WEST COAST OF NORTHERN SUMATRA

USGS Earthquake Hazards ^ | 2004 December 26 00:58:55 UTC

[bd476]

Magnitude 8.1 - OFF THE WEST COAST OF NORTHERN SUMATRA
2004 December 26 00:58:55 UTC

Preliminary Earthquake Report
West Coast and Alaska Tsunami Warning Center/NOAA/NWS

A great earthquake occurred at 00:58:55 (UTC) on Sunday, December 26, 2004. The magnitude 8.1 event has been located OFF THE WEST COAST OF NORTHERN SUMATRA. (This event has been reviewed by a seismologist.)

Magnitude	8.1
Date-Time	Sunday, December 26, 2004 at 00:58:55 (UTC) = Coordinated Universal Time Sunday, December 26, 2004 at 6:58:55 AM = local time at epicenter
Location	3.400°N, 95.700°E
Depth	40 km (24.9 miles) set by location program
Region	OFF THE WEST COAST OF NORTHERN SUMATRA
Distances	235 km (145 miles) S of Banda Aceh, Sumatra, Indonesia 330 km (205 miles) W of Medan, Sumatra, Indonesia 1620 km (1000 miles) NW of JAKARTA, Java, Indonesia 3405 km (2120 miles) SE of NEW DELHI, Delhi, India
Location Uncertainty	Error estimate not available
Parameters	Nst=020, Nph=020, Dmin=>999 km, Rmss=0.98 sec, Gp=101°, M-type=moment magnitude (Mw), Version=1
Source	West Coast and Alaska Tsunami Warning Center/NOAA/NWS
Event ID	at00000264

Location Maps: 10-degree NEIC Maps Did you feel it? Report shaking and damage at your location. You can also view a map displaying accumulated data from your report and others. Historical Moment Tensor Solutions Seismic Hazard Map Historical Seismicity Theoretical P-Wave Travel Times Magnitude 7 and Greater Earthquakes This Year TsunamiBulletin Archive of newsworthy events

[Godebert]

Well....I reckon that question was answered.

[mindspy]

I guess they're expertise is limited by common sense.

[mindspy]

they're = their

[Imaverygooddriver]

What happened, did Michael Moore jump in the water?

[null and void]

CANNON BALL!!!!

[null and void]

So Quix, do you put Jesus before God?

[Quix]

Ahhhh.

Have usually spent most of my time visiting western friends in Chiang Mai. And checking in on the tribal weavings.

[Quix]

{{{SUPER HUGS}}}}

Your exhortations are most welcome. And wise. THX.

[commonguymd]

good choice.

[Quix]

You are quite likely right again.

Prayers for mother most welcome. The itching problem has driven all of us to distractions. She's on Prednizone now and that's not too helpful on the itching but makes her stronger--some walking again after being too weak for months--and makes her crazier. Interestingly aspirin seems to mellow her out.

Wheeeee. Not the sort of . . . time, life, I'd recommend for favorite recreation. But, evidently God sees fit to assign it as school.

His Peace and Joy to you and yours.

[Quix]

Please take that nonsensical question to one of my religion threads.

[commonguymd]

Quite the choice of questions to ask on that exact post number.... 666

hmmmm- Is it another sign of the apocolypse?

/sorry - couldn't resist

[bd476]

Magnitude 6.1 - ANDAMAN ISLANDS, INDIA REGION
2004 December 27 00:49:26 UTC Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

A strong earthquake occurred at 00:49:26 (UTC) on Monday, December 27, 2004. The magnitude 6.1 event has been located in the ANDAMAN ISLANDS, INDIA REGION. (This event has been reviewed by a seismologist.)

Magnitude	6.1
Date-Time	Monday, December 27, 2004 at 00:49:26 (UTC) = Coordinated Universal Time Monday, December 27, 2004 at 6:19:26 AM = local time at epicenter
Location	12.978°N, 92.449°E
Depth	10 km (6.2 miles) set by location program
Region	ANDAMAN ISLANDS, INDIA REGION
Distances	150 km (90 miles) NNW of Port Blair, Andaman Islands, India 485 km (300 miles) SSW of Pathein (Bassein), Myanmar 870 km (540 miles) W of BANGKOK, Thailand 2340 km (1450 miles) SE of NEW DELHI, Delhi, India
Location Uncertainty	horizontal +/- 5.5 km (3.4 miles); depth fixed by location program
Parameters	Nst=116, Nph=116, Dmin=922.1 km, Rmss=0.74 sec, Gp= 68°, M-type=body magnitude (Mb), Version=6
Source	USGS NEIC (WDCS-D)
Event ID	ussnad

[capitan_refugio]

"strat" was basically correct. The seafloor changes location - it is displaced from where it was. The displacement can be compressional, tensional, or lateral (or a combination of lateral and another motion).

In this case, the seafloor on part of the fault-zone that moved, was raised as much as 10 meters. Think of what might happen if the bottom of a swimming pool was suddenly thrust up 10 inches - there would be a big wave of water spilling out over the edges. Now think of that on an oceanic scale with a few ten of thousands of square miles of ocean floor being thrust up as much a 35 feet.

[capitan_refugio]

I'm not sure - I don't get the e-mails. Do they use a symbol of some sort? (Such as Ml or Ms?)

[bd476]

Great explanation of P-waves and S-waves, Capitan.

[JennysCool]

Aftershock? Or separate event?

[Quix]

Thanks much. Have wondered about whether the sea floor was raised or lowered 20 feet or so.

[Quix]

Just checked my email.

They just use M for magnitude. I suspect it's the ?moment? measure.

Anyone else know for sure what the USGS uses in their email list?

[JennysCool]

Ha! I thought for a moment your tagline said "Shaving a form of godliness." ... Well, i guess it could be considered cleanliness ...