The Great Sumatra-Andaman Earthquake of 26 December 2004

Author:

Lay Thorne12345,Kanamori Hiroo12345,Ammon Charles J.12345,Nettles Meredith12345,Ward Steven N.12345,Aster Richard C.12345,Beck Susan L.12345,Bilek Susan L.12345,Brudzinski Michael R.12345,Butler Rhett12345,DeShon Heather R.12345,Ekström Göran12345,Satake Kenji12345,Sipkin Stuart12345

Affiliation:

1. Earth Sciences Department, University of California, Santa Cruz, CA 95064, USA.

2. Institute of Geophysics and Planetary Physics, University of California, Santa Cruz, CA 95064, USA.

3. Seismological Laboratory, California Institute of Technology, MS 252-21, Pasadena, CA 91125, USA.

4. Department of Geosciences, The Pennsylvania State University, 440 Deike Building, University Park, PA 16802, USA.

5. Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138, USA.

Abstract

The two largest earthquakes of the past 40 years ruptured a 1600-kilometer-long portion of the fault boundary between the Indo-Australian and southeastern Eurasian plates on 26 December 2004 [seismic moment magnitude ( M w ) = 9.1 to 9.3] and 28 March 2005 ( M w = 8.6). The first event generated a tsunami that caused more than 283,000 deaths. Fault slip of up to 15 meters occurred near Banda Aceh, Sumatra, but to the north, along the Nicobar and Andaman Islands, rapid slip was much smaller. Tsunami and geodetic observations indicate that additional slow slip occurred in the north over a time scale of 50 minutes or longer.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference47 articles.

1. The February 23 2005 update on the U.S. Geological Survey (USGS) Web site http://earthquake.usgs.gov/eqinthenews/2004/usslav indicates 283 100 confirmed fatalities 14 100 missing and 1 126 900 displaced. The majority of the fatalities were in Indonesia (235 800) with 30 900 fatalities in Sri Lanka.

2. K. Abe personal communication 2005.

3. Size of great earthquakes of 1837–1974 inferred from tsunami data

4. http://earthquake.usgs.gov/eqinthenews/2005/usweax indicates more than 1300 fatalities on Nias Simeulue Kepulauen Banyak and Meulaboh.

5. R. Butler et al. EOS Trans. Am. Geophys. Union 85 225 (2004); http://www.iris.edu.

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