摘要
地震震源机制解的确定,对于地震研究及孕震机理解释具有重要意义。近年来我国东北几次破坏性地震主要发生在吉林松原地区,分析震源机制,对认识该地区地质构造和孕震机理具有重要的科学价值。2017年7月23日吉林松原发生4.9级地震,利用CAP方法,反演得到此次地震震源机制解:节面Ⅰ:走向307.0°,倾角66.0°,滑动角12.0°;节面Ⅱ:走向212.1°,倾角79.1°,滑动角155.5°;震源深度6.9km,结果表明此次地震震源机制解类型为走滑型。
The determination of focal mechanism solution is of great significance to seismic research and interpretation of seismogenic mechanism.In recent years,several destructive earthquakes in Northeast China mainly occurred in Songyuan area of Jilin Province.The analysis of focal mechanism is of great scientific value for understanding the geological structure and seismogenic mechanism of this area.The focal mechanism solution of the 4.9 magnitude earthquake occurred in Songyuan,Jilin Province on July 23,2017 was obtained by inversion using CAP method:nodal plane I:strike 307.0 degrees,dip 66.0 degrees,slip angle 12.0 degrees;nodal plane II:strike 212.1 degrees,dip 79.1 degrees,slip angle 155.5 degrees;focal depth 6.9 km.The results show that the focal mechanism solution type of the earthquake is strike-slip type.
作者
刘爱华
张伟
龚飞
姜锦华
张雁翔
李俊秋
相传芳
Liu Aihua;Zhang Wei;Gong Fei;Jiang Jinhua;Zhang Yanxiang;Li Junqiu;Xiang Chuanfang(Heilongjiang Earthquake Agency,Harbin 150090,China;Beijing Earthquake Agency,Beijing 100080,China;Yudong Earthquake Monitoring Station,Yunnan Province 657000,China)
出处
《地震地磁观测与研究》
2018年第6期78-85,共8页
Seismological and Geomagnetic Observation and Research
关键词
吉林松原地震
CAP方法
震源机制解
Songyuan earthquake in Jilin
CAP method
focal mechanism solution
