Characteristics of InSAR Coseismic Deformation and Slip Distribution of the Akto MS6.7 Earthquake,Xinjiang |
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| Authors: | QIU Jiangtao ZHAO Qiang and LIN Peng |
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| Institution: | The Second Monitoring and Application Center, CEA, Xi''an 710054, China,The Second Monitoring and Application Center, CEA, Xi''an 710054, China and The Second Monitoring and Application Center, CEA, Xi''an 710054, China |
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| Abstract: | The Akto MS6.7 earthquake occurred near the western end of the Muji fault basin in the top of the Pamir syntaxis. The main shock of this earthquake is complicated and the focal mechanism solutions based on the seismic wave inversions are different. Based on the Sentinel-1 SAR data, the coseismal deformation field of the earthquake is obtained by InSAR technique. Based on the elastic half-space dislocation model, the geometrical parameters and the slip distribution model are determined by nonlinear and linear inversion algorithms. The results show that the distributed slip model can well explain the coseismic deformation field. The earthquake includes at least two rupture events, which are located at 7km (74.11°E, 39.25°N) and 33km (74.49°E, 39.16°N) east from the epicenter according to the CENC. The deformation field caused by the earthquake shows a symmetry distribution, with the maximum LOS deformation of 20cm. The main seismic slip is concentrated in the 0-20km depth, and the maximum slip is 0.84m. The seismic fault is the Muji fault, and this earthquake indicates that the northeastward push of the Indian plate is enhanced. |
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| Keywords: | The Akto earthquake InSAR Coseismic slip distribution Muji fault Focal mechanism |
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