Focal Mechanism Solution of the 2011 Ms 4. 8 Anqing Earthquake Determined from the CAP Method
Earthquake Research in China(2012)
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 3kin. 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.
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关键词
Anqing earthquake,Cut And Paste method,Focal mechanism solution
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