摘要
采用CAP方法反演2014年1月18日河南范县M_L 4.2地震震源机制,反演结果显示:震源矩心深度在9 km处获得最佳震源机制解,其中:矩震级MW=4.0;节面Ⅰ:走向66°,倾角83°,滑动角-171°;节面Ⅱ:走向335°,倾角81°,滑动角-7°。同时采用P波初动和Snoke方法求解,发现震源机制解与CAP方法一致。初步推断此次地震的震源机制解属于走滑型,节面Ⅰ为NE走向,与该区内聊兰断裂方向一致,推测此地震应与聊兰断裂活动相关。
Inverting the ML4.2earthquake focal mechanism solution in Fanxian county,Henan Provincein2015.1.18by CAP method,we come to conclusions:The optimum focal mechanism solutionwas gained at the focus depth of9km,and the moment magnitude(MW)is equal to4.0.One pitchsurface’s strike is66degree and its dip is83degree and its slide angle is-171degree.Those of theother pitch surface are134.9degree,81.1degree and-7.1degree.The data reveal that both belongto strike-slip fault which is as well the result of P-wave first motion method and Snoke method.The strike coincides with the direction of Liao-Lan fault in this region,implying certain correlationbetween earthquake and Liao-Lan fault activity.
作者
郑培玲
邢康
贾漯昭
王明亮
高家乙
何重阳
Zheng Peiling;Xing Kang;Jia Luozhao;Wang Mingliang;Gao Jiayi;He Chongyang(Earthquake Administration of Henan Province, Zhengzhou 450016, China)
出处
《地震地磁观测与研究》
2017年第1期28-31,共4页
Seismological and Geomagnetic Observation and Research
基金
河南省地震局数字地震学研究创新团队科研项目
