The Surface Coseismic Deformation and Source Paramenters Research of the Xizang Gaize Earthquake Based on the InSAR Technology
On 9 January,2008,the Mw 6.4 earthquake occurred in Gaize, Central Tibet of China, then the largest aftershock Mw 5.9 followed on 16th of January. Firstly, we derive the co-seismic deformation field with Synthetic Aperture Radar. The results show an asymmetric deformation pattern both mainshock and aftershock with normal faulting on a NE-striking fault plane.Then we invent for the geometry and the slip-distribution on the double-fault models. The result shows that the inverted hypocenter location of Mw 6.4 mainshock and Mw 5.9 aftershock are at 85.30±0.03°E/32.44±0.03°N and 85.27±0.01°E/32.46±0.02°N with strikes of 213.31°and 201°,and with dips of 56°and 54°,respectively. The mainshock upper side is about 2.9km from ground surface, the average slip is 0.74mand the maximum slip is about 2.32m occurring at depth of 7.92km under ground surface, and the average rake over the slipping area is -65.4°,the released scalar moment is 2.19×1018 Nm;The aftershock upper side is about 1.6km from ground surface,the average slip is 0.87m and the maximum slip is about 1.12m occurring at depth of 4.13km under ground surface, and the average rake over the slipping area is -75.0°,the released scalar moment is 1.41×1018Nm.
Gaize earthquakes InSAR,co-seismic deformation field the elastic half-space dislocation model hypocentral parameters
Guifang Zhang Xinjian Shan Chao Ma Xiaogang Song
Institute of Geology, China Earthquake Administration. State Key Laboratory of Earthquake Dynamics D School of surveying and Land Infomation Engineering,Henan Polytechnic University Jiaozuo City, Henan
国际会议
福州
英文
367-369
2011-06-29（万方平台首次上网日期，不代表论文的发表时间）