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Rapid afterslip and short-term viscoelastic relaxation following the 2008 M_W7.9 Wenchuan earthquake |
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| Authors: | Zhigang Shao Rongjiang Wang Yanqiang Wu Langping Zhang Institute of Earthquake Science China Earthquake Administration Beijing China GFZ German Research Center for Geosciences D- Potsdam Germany |
| Institution: | Zhigang Shao 1 Rongjiang Wang 2,Yanqiang Wu 1 and Langping Zhang 1 1 Institute of Earthquake Science,China Earthquake Administration,Beijing 100036,China 2 GFZ German Research Center for Geosciences,D-14473 Potsdam,Germany |
| Abstract: | Significant postseismic deformation of the 2008 M W 7.9 Wenchuan earthquake has been observed from GPS data of the first 14 days after the earthquake. The possible mechanisms for the rapid postseismic deformation are assumed to be afterslip on the earthquake rupture plane and viscoelastic relaxation of coseismiclly stress change in the lower crust or upper mantle. We firstly use the constrained least squares method to find an afterslip model which can fit the GPS data best. The afterslip model can explain n... |
| Keywords: | Wenchuan earthquake short-term postseismic deformation aseismic slip viscoelastic relaxation |
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