Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2558
AuthorsBoschi, E.* 
Casarotti, E.* 
Devoti, R.* 
Melini, D.* 
Piersanti, A.* 
Pietrantonio, G.* 
Riguzzi, F.* 
TitleCoseismic deformation induced by the Sumatra earthquake
Issue Date2006
Series/Report no./ 42 (2006)
DOI10.1016/j.jog.2006.05.002
URIhttp://hdl.handle.net/2122/2558
KeywordsCoseismic
deformation
Subject Classification04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
AbstractThe giant Sumatra-Andaman earthquake of December 26, 2004 caused permanent deformations effects in a region of previously never observed extension. The GPS data from the worldwide network of permanent IGS sites show significant coseismic displacements in an area exceeding 107 km2, reaching most of South-East Asia, besides Indonesia and India. We have analyzed long GPS time series histories in order to characterize the noise type of each site and, consequently, to precisely assess the formal errors of the coseismic offset estimates. The synthetic simulations of the coseismic displacement field obtained by means of a spherical model using different rupture histories indicate that a major part of the energy release took place in a fault plane similar to that obtained by Ammon et al. (2005) and Vigny et al. (2005) but with a larger amount of compressional slip on the northern segment of the fault area. © 2006 Elsevier Ltd. All rights reserved.
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