HR: 0800h
AN: S31C-0561    [Abstracts]
TI: The 2004 Sumatra Earthquake Mw 9.3: Seismological and Geophysical Investigations in the Andaman-Nicobar Islands
AU: * Kayal, J
EM: jr_kayal@hotmail.com
AF: Geological Survey of India, 27 J. Nehru Road, Kolkata, 70016, India
AU: * Kayal, J
EM: jr_kayal@hotmail.com
AF: Indian School, of Mines, Dhanbar, 826004, India
AU: Mooney, W D
EM: mooney@usgs.gov
AF: US Geological Survey, 345 Middlefield Rd. MS 977, Menlo Park, CA 94025, United States
AB: The December 26, 2004 Sumatra-Andaman earthquake (MW 9.3) is the fourth largest event (M=9.0) in the world during the last 100 years. It occurred by thrust faulting on the interplate thrust of the subducting Indian plate and overriding Burmese platelet. The main shock rupture, ~1300 km long and 200 km wide, propagated from north of Sumatra to Andaman Nicobar Islands; the slow rupture generated a tsunami which killed about 300,000 people. The epicenter of the earthquake is located at 3.90°N and 94.26°E with a focal depth at 28 km (USGS). The past significant earthquakes in this zone are the 31 December, 1881 (M 7.9), 26 June, 1941 (M 7.7), 20 January, 1982 (M 6.3) and 14 September, 2002 (M 6.0).
DE: 7218 Lithosphere (1236)
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 7294 Seismic instruments and networks (0935, 3025)
DE: 8110 Continental tectonics: general (0905)
SC: Seismology [S]
MN: 2007 Fall Meeting