吉林松原宁江地震序列精定位  

Precise Location of Ningjiang Earthquake Sequence in Songyuan,Jilin Province

作　　者：张洪艳[1] 刘轶男 张帆[1] 卢燕红[1] 张宇[1] ZHANG Hongyan;LIU Yinan;ZHANG Fan;LU Yanhong;ZHANG Yu(Jilin Earthquake Agency,Changchun 130117,China;Fengman Seismic Station,Fengman 132108,China)

机构地区：[1]吉林省地震局,吉林长春130117 [2]丰满地震台,吉林丰满132108

出　　处：《防灾科技学院学报》2020年第1期32-37,共6页Journal of Institute of Disaster Prevention

摘　　要：使用吉林区域数字地震台网和流动台网的观测数据,采用HypoDD方法对2018年1月1日至2019年8月10日发生在吉林松原宁江地区259次地震事件进行精定位. 结果显示,定位后地震序列分布更为集中,主要分布在第二松花江断裂与扶余-肇东断裂交汇处,无明显的优势方向,震源深度主要集中在7~11km. 精定位的结果不能确定松原宁江地震的发震构造,结合李君对该地区震源机制解的相关研究,认为第二松花江断裂为松原宁江地震的发震断层.Using the observation data of Jilin Digital Observation Network and Mobile Observation Network,we precisely located the focal locations of 259 earthquakes occurred in Ningjiang area of Songyuan,Jilin Province from Jan.1,2018 to Aug.10,2019 by using the HypoD D method.The relocation results indicate that there exists a more concentrated seismic sequence distribution,being mainly concentrated at the intersection of the Second Songhuajiang Fault and the Fuyu-Zhaodong Fault,without obvious dominant direction,and the focal depth mainly ranges within 7~11 km.Only using the precise location results,we cannot determined the seismogenic structure of Ningjiang earthquakes.So combined with focal mechanism solution in this area,we conclude that the Second Songhuajiang fault is the seismogenic fault.

关 键 词：双差定位 地震序列 吉林松原宁江 地震分布 震源深度 

分 类 号：P315.7[天文地球—地震学]