Finite element method to invert coseismic slip of Yutian earthquake from InSAR

Chisheng Wang; Changlin Wang; Xinjian Shan; Guohong Zhang; Liming Guo; Yufei Han

doi:10.1117/12.873216

3 November 2010 Finite element method to invert coseismic slip of Yutian earthquake from InSAR

Chisheng Wang, Changlin Wang, Xinjian Shan, Guohong Zhang, Liming Guo, Yufei Han

Proceedings Volume 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications; 78410L (2010) https://doi.org/10.1117/12.873216
Event: The Sixth International Symposium on Digital Earth, 2009, Beijing, China

Abstract

The 2009 Ms 7.3 Yutian Earthquake ruptured the boundary between Yutian Country and Qira Country, Xinjiang. To simulate coseismic deformation of an earthquake, usually dislocation model with the assumption of homogeneous, isotropic and elastic half-space are applied. However, these assumptions are oversimplified and not always able to precisely approximate every earthquake. Here we took Finite Element Method (FEM) instead of dislocation model to infer coseismic fault slip from surface deformation observed by InSAR. To obtain Yutian earthquake coseismic displacement, ENVISAR/ASAR data from both descending and ascending orbits were processed. AQAQUS code was taken to generate Green functions and Quadratic Programming algorithm was implemented in the linear inversion. The inversed slip distribution imply Yutian earthquake to be a simple event with only one slip concentration on the fault plane. Maximum slip is up to 3.89m near the surface, occurs at N35.370, E81.510. The estimated moment magnitude is Mw 7.1.

Citation Download Citation

Chisheng Wang, Changlin Wang, Xinjian Shan, Guohong Zhang, Liming Guo, and Yufei Han "Finite element method to invert coseismic slip of Yutian earthquake from InSAR", Proc. SPIE 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications, 78410L (3 November 2010); https://doi.org/10.1117/12.873216

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