Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6339
Title: Coseismic fault slip of the 2008 M[sub w] 7.9 Wenchuan earthquake estimated from InSAR and GPS measurements
Authors: Feng, G
Hetland, EA
Ding, X 
Li, Z
Zhang, L 
Issue Date: Jan-2010
Source: Geophysical research letters, Jan 2010, v. 37, no. 1, L01302
Abstract: We infer co-seismic fault slip during the 2008 M[sub w] 7.9 Wenchuan earthquake from interferometric synthetic aperture radar (InSAR) and GPS observations of ground deformation. We use ALOS/PALSAR data from ascending orbits on six tracks, and we do not use data that are strongly affected by ionospheric perturbations. We use a fault model composed of three planar fault segments of the Beichuan fault, and one planar segment representing the parallel Pengguan fault. Maximum thrust-slip is up to 6.7 m near the surface, and occurs in two locations, near Yingxiu in the south and Beichuan in the center of the rupture. Maximum strike-slip is over 4 m, and occurs near Pingtong and Nanba along the northern end of the rupture. We find that the ratio of coseismic thrust- to strike-slip on the Beichuan fault decreases from 1.5 to 0.7 from the SW to the NE.
Keywords: Coseismic slip
InSAR
Earthquake
Publisher: John Wiley and Sons
Journal: Geophysical research letters 
ISSN: 0094–8276 (print)
1944–8007 (online)
DOI: 10.1029/2009GL041213
Rights: Copyright 2010 by the American Geophysical Union.
Appears in Collections:Journal/Magazine Article

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