Study on the 3-D Velocity Structure around the Focal Region of the Anqing Earthquake in January 2011 and Discussion on the Causative Fault

查看全文 作　　者：Chen [1]Anguo;Ni [1]Hongyu;Liu [1]Dongwang;Shen [1]Xiaoqi;Liu [1]Zemin;Zheng [1]Haigang

机构地区：[1]Earthquake Administration of Anhui Province,Hefei 230031,China

出　　处：《Earthquake Research in China》索引2012年第26卷第2期,共9页

基　　金：funded by the Key Research Program of 'Tracking the Southern Section of the Tancheng-Lujiang Fault Zone and Study on the Earthquake Risk in Its Vicinity among 2011 National Seismic Risk Zones ' (2011013301);the Youth Projects of Earthquake Research Fund of Anhui Province,2011 (20110403) 摘　　要：The Anqing MS4.8 earthquake occurred on January 19, 2011, with the epicenter lying in the foreland deformation belt along the Yangtze River of the lower Yangtze block. After the earthquake, the field work team surveyed and collected building damage data, calculating and obtaining more accurate intensity distributions. The focal mechanism of the main shock was calculated tentatively using digital seismic wave data from provincial digital seismic networks using the FOCMEC program and the first motions of P, SV and SH waves with their amplitude ratios. Using the location results of the main shock and aftershocks by the Anhui seismic network, combining the three-dimensional crust velocity structure imaging results of the focal region by seismic tomography, and referring on intensity distribution of the elliptic major axis' predominant direction, we conclude by comprehensive analysis that the NE-trending Susong-Zongyang fault is possibly the causative fault of the Anqing earthquake. 关键词：地壳速度结构 8级地震发震断层震源区安庆 3-D 数字地震台网地震层析成像

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Study on the 3-D Velocity Structure around the Focal Region of the Anqing Earthquake in January 2011 and Discussion on the Causative Fault

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