This web site was copied prior to January 20, 2005. It is now a Federal record managed by the National Archives and Records Administration. External links, forms, and search boxes may not function within this collection. Learn more.   [hide]
Link to USGS home page

2004 November 11 21:26:41 UTC

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

A major earthquake occurred at 21:26:41 (UTC) on Thursday, November 11, 2004. The magnitude 7.5 event has been located in KEPULAUAN ALOR, INDONESIA. (This event has been reviewed by a seismologist.)
Small globe showing earthquake

Small map showing earthquake

Magnitude 7.5
Date-Time Thursday, November 11, 2004 at 21:26:41 (UTC)
= Coordinated Universal Time
Friday, November 12, 2004 at 5:26:41 AM
= local time at epicenter

Time of Earthquake in other Time Zones
Location 8.172°S, 124.856°E
Depth 10 km (6.2 miles) set by location program
90 km (55 miles) WNW of DILI, East Timor
260 km (160 miles) NNE of Kupang, Timor, Indonesia
360 km (225 miles) ENE of Ende, Flores, Indonesia
810 km (500 miles) NW of DARWIN, Northern Territory, Australia
Location Uncertainty horizontal +/- 8.2 km (5.1 miles); depth fixed by location program
Parameters Nst=186, Nph=186, Dmin=258 km, Rmss=1.19 sec, Gp= 36°,
M-type=teleseismic moment magnitude (Mw), Version=S
Event ID usqsci
Felt Reports At least 25 people killed, 234 injured, 781 buildings destroyed and 7616 damaged on Alor. Roads blocked in some areas due to landslides. Felt (VIII) at Kalabahi. Felt as far away as Dili, Timor.

Tsunami Information


News Links

Printer friendly version

For more information, go to || Contacts

Back to: World map | USA map

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.

FAQ about Earthquakes | Earthquake Preparedness

The USGS Earthquake Hazards Program (EHP) of the U.S. Geological Survey (USGS)
is part of the National Earthquake Hazards Reduction Program (NEHRP)
led by the Federal Emergency Management Agency (FEMA). 



U.S. Department of the Interior, U.S. Geological Survey
This page is brought to you by the Earthquake Hazards Program
Maintained by: Web Team
Last modification: 17 November 2004
Contact Us: Web_Team

USGS Privacy Statement | | Disclaimer | | FOIA | | Accessibility

First Government graphic