2015年7月3日新疆皮山M_S6.5地震序列活动性及重新定位研究

Seismicity and Relocation of the July 3,2015 Pishan M_S6.5 Earthquake Sequence

2015年7月3日新疆皮山M_S6.5地震发生在塔里木块体与西昆仑交会地区,该地区近年来中强地震较为活跃。本文对2015年新疆皮山M_S6.5地震序列及其附近地区中强震序列b值等参数进行了研究。另外,还利用新疆台网的震相报告,采用双差定位方法对余震进行了重新定位,对皮山余震序列的主震破裂区地震活动时空变化特征进行了分析和讨论,为该地区地震危险性评估提供参考。

The July 3, 2015 Pishan Ms6.5 earthquake occurred in the intersection area of Tarim block and the western Kunlun where moderate-strong earthquakes has become more active in recent years. We studied seismicity parameters of the earthquake sequences such as b value in the Pishan region and its vicinity. In addition, we also relocated the aftershocks of the Pishan Ms6. 5 earthquake using the seismic phase reported by the doubledifference method. We also analyzed temporal and spatial variation characteristics of the Pishan earthquake sequence in the rupture zone as a reference to the seismic hazard assessment.