Plate-boundary deformation associated with the great Sumatra–Andaman earthquake

Cecep Subarya, Mohamed Chlieh, Linette Prawirodirdjo, Jean-Philippe Avouac (), Yehuda Bock, Kerry Sieh, Aron J. Meltzner, Danny H. Natawidjaja and Robert McCaffrey
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Cecep Subarya: National Coordinating Agency for Surveys and Mapping
Mohamed Chlieh: California Institute of Technology
Linette Prawirodirdjo: University of California San Diego
Jean-Philippe Avouac: California Institute of Technology
Yehuda Bock: University of California San Diego
Kerry Sieh: California Institute of Technology
Aron J. Meltzner: California Institute of Technology
Danny H. Natawidjaja: Indonesian Institute of Sciences
Robert McCaffrey: Rensselaer Polytechnic Institute

Nature, 2006, vol. 440, issue 7080, 46-51

Abstract: Abstract The Sumatra–Andaman earthquake of 26 December 2004 is the first giant earthquake (moment magnitude Mw > 9.0) to have occurred since the advent of modern space-based geodesy and broadband seismology. It therefore provides an unprecedented opportunity to investigate the characteristics of one of these enormous and rare events. Here we report estimates of the ground displacement associated with this event, using near-field Global Positioning System (GPS) surveys in northwestern Sumatra combined with in situ and remote observations of the vertical motion of coral reefs. These data show that the earthquake was generated by rupture of the Sunda subduction megathrust over a distance of >1,500 kilometres and a width of

Date: 2006
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DOI: 10.1038/nature04522

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