INVERSION OF COSEISMIC SLIP DISTRIBUTION OF 2001 Ms8.1 KUNLUN EARTHQUAKE FROM GPS OBSERVATIONS WITH GREEN’S FUNCTION METHOD BASED ON A HETEROGENEOUS CRUST MODEL
Zhou Yu;Nie Zhaosheng;Jia Zhige;Chen Zhengsong; and Yang Shaomin
Key Laboratory of Earthquake Geodesy, Institute of Seismology, CEA, Wuhan 430071
Abstract：2001 Kunlun Ms8.1 earthquake ruptured as long as about 400 km. The displacement gradient perpendicular to the strike of rupture belt is significantly greater on the south side than that on the north. This fact cannot be explained by Okada model which is based on elastically homogeneous half space. A horizontally and vertically heterogeneous 3DFEM model is established to generate Green’s functions of slip on 16 segments of the rupture belt with respect to the ground displacement field.With the damping LS(least square) algorithm,the slip distribution of rupture is inversed from observed horizontal displacements of 40 GPS sites, and the result is in good agreement with that from geological field investigation. The ground displacement field rebuilt by the inversed result is close to that observed by GPS, demonstrating different deformation patterns on the two sides of the rupture.
Zhou Yu,Nie Zhaosheng,Jia Zhige et al. INVERSION OF COSEISMIC SLIP DISTRIBUTION OF 2001 Ms8.1 KUNLUN EARTHQUAKE FROM GPS OBSERVATIONS WITH GREEN’S FUNCTION METHOD BASED ON A HETEROGENEOUS CRUST MODEL[J]. jgg, 2012, 32(3): 22-26.
