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Magnitude 9.1 OFF THE WEST COAST OF NORTHERN SUMATRA
Sunday, December 26, 2004 at 00:58:53 UTC

World Location

Regional Location

Magnitude 9.1
Date-Time Sunday, December 26, 2004 at 00:58:53 (UTC) - Coordinated Universal Time
Sunday, December 26, 2004 at 07:58:53 AM local time at epicenter
Time of Earthquake in other Time Zones
Location 3.30N 95.96E
Depth 30 kilometers
Region OFF THE WEST COAST OF NORTHERN SUMATRA
Reference 255 km (155 miles) SSE of Banda Aceh, Sumatra, Indonesia
300 km (185 miles) W of Medan, Sumatra, Indonesia
1260 km (780 miles) SSW of BANGKOK, Thailand
1590 km (990 miles) NW of JAKARTA, Java, Indonesia
Location Quality Error estimate: horizontal +/- 5.9 km; depth fixed by location program
Location Quality
Parameters
Nst=488, Nph=488, Dmin=643.4 km, Rmss=1.16 sec, Erho=5.9 km, Erzz=0 km, Gp=28.7 degrees
Source USGS NEIC (WDCS-D)
Remarks This is the fourth largest earthquake in the world since 1900 and is the largest since the 1964 Prince William Sound, Alaska earthquake. In total, more than 283,100 people were killed, 14,100 are still listed as missing and 1,126,900 were displaced by the earthquake and subsequent tsunami in 10 countries in South Asia and East Africa. The earthquake was felt (IX) at Banda Aceh, (VIII) at Meulaboh and (IV) at Medan, Sumatra and (III-V) in parts of Bangladesh, India, Malaysia, Maldives, Myanmar, Singapore, Sri Lanka and Thailand. The tsunami caused more casualties than any other in recorded history and was recorded nearly world-wide on tide gauges in the Indian, Pacific and Atlantic Oceans. Seiches were observed in India and the United States. Subsidence and landslides were observed in Sumatra. A mud volcano near Baratang, Andaman Islands became active on December 28 and gas emissions were reported in Arakan, Myanmar. (last updated 2/23/05).

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NB: The official magnitude for this earthquake is indicated at the top of this page. This was the best available estimate of the earthquake's size, at the time that this page was created. Other magnitudes associated with web pages linked from here are those determined at various times following the earthquake with different types of seismic data. Although, given the data used, they are legitimate estimates of magnitude they are not considered the official magnitude.

The region name is an automatically generated name from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme. The boundaries of these regions are defined at one-degree intervals and therefore differ from irregular political boundaries. More->

 


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