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Journal: |
Geophysical Research Letter 2010 No.1
clicks:938 |
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Title:
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Author:
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GuangCai Feng,Eric A. Hetland,XiaoLi Ding,ZhiWei Li,Lei Zhang |
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Adress: |
Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Kowloon, Hong Kong |
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Abstract:
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We infer co-seismic fault slip during the 2008 Mw 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. |
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