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《地震学报(英文版)》 2016-01
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Waveform inversion and analysis of an unusual earthquake swarm in the Boshan mining area,Shandong Province,China

Jian-Chang Zheng;Jin-Hua Zhao;Chang-Peng Xu;Peng Wang;Earthquake Administration of Shandong Province;  
Moment tensor solutions were retrieved for the earthquake swarm that occurred during November and December 2010 in the Boshan mining area,Shandong Province,China.The results showed that the double-couple components in the source mechanisms were higher at the beginning of the swarm and consisted mainly of shear faulting controlled by tectonic stress.The subsequent events had significant non-double-couple components,indicating tensile faulting.The double-couple components predominately presented as normal faulting and the P axes were orientated almost vertically.The slip vectors of the swarm events were relatively stable.With reference to the tectonic features near the epicenter,we concluded that the swarm was a result of subordinate fault motion related to the Wangmu Mountain fault and that high-pressure pore fluids played a crucial role in the activity of the earthquake swarm.
【Fund】: partly supported by the program of Science for Earthquake Resilience(XH15026)provided by China Earthquake Administration;; the Science and Technology Development Plan Project of Shandong Province China (GRANT-2014GSF120007)
【CateGory Index】: P315
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