Focal Mechanism Solution of the 2011 M_S4.8 Anqing Earthquake Determined from the CAP Method

查看全文 作　　者：Hong [1,2]Dequan;Wang [1,2]Xingzhou;Han [3]Libo;Qi [1]Hao;Zhang [1]Bing

机构地区：[1]Earthquake Administration of Anhui Province, Hefei 230031, China;[2]Mengcheng National Field Observation Station, Hefei 230026, China;[3]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

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

基　　金：supported by the China Earthquake Administration as a work Assignment for Seismic Situation Tracing for Earthquake Forecast and Prediction (2011020104) 摘　　要：In this article, we have inverted local broadband waveform data to determine the focal mechanism of the 2011 MS4.8 Anqing earthquake. Our results show that the best double couple solution of the MS4.8 event is 16°, 74° and 120° for strike, dip and rake angles of one nodal plane respectively, and 131°, 33°, 30° for the other nodal plane. The estimated focal depth is about 3km. Both strikes of the two nodal planes differ significantly to the strike of Susong-Zongyang fault, along which seismic activity has been at a low level since the Late Quaternary. This implies that this earthquake may not have occurred on the Susong-Zongyang fault, and we infer that a buried fault with strike of NNE may be the seismogenic structure of this event. 关键词：震源机制解地震活动安庆 CAP 波形数据震源深度晚第四纪发震构造

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Focal Mechanism Solution of the 2011 M_S4.8 Anqing Earthquake Determined from the CAP Method

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