【摘要】 基于广东地震台网记录的地震观测报告和连续波形数据,应用双差地震定位算法,对2019年10月12日广西北流-广东化州M_S5.2地震序列进行重新精确定位。重新定位后结合震源分布和震源机制解发现:发震断层沿NWW方向展布,跨度约3.5 km,破裂深度4～10 km。震后25 h内的余震基本沿断层方向分布,有部分沿破裂面向深处发展。之后的余震有向地表、向北东向发展的趋势,根据震源深度剖面分布判断断层的倾角约75°。与震源机制解的断层形态基本一致。更多还原

【Abstract】 Based on the catalog data and continuous waveform data recorded by Guangdong Digital Seismic Network, the Beiliu—Huazhou M_S5.2 earthquake sequence from 12 th Oct,2019 were relocated with double difference algorithm. According to the hypocenter distribution and focal mechanism, the fault distributes along the NWW direction,and spans about 3.5 km wide with a rupture depth range of 4～10 km. Aftershocks within 25 hours after the main shock distributed basically along the fault strike and mostly developed toward the deeper part. Aftershocks later developed toward the surface and northeast,and the dip of the fault was about 75 degree according to the profile,consistent with the focal mechanism solution.更多还原