用CAP方法研究大同—阳高4.6级地震震源机制  

Study on focal mechanism of the Datong-Yanggao earthquake of M 4.6 by the method of CAP

作　　者：张玲[1,2] 宋美琴[1,2] 韩立波[3] 范瑾[1,2] 赵晓云[1,2] 

机构地区：[1]山西省地震局,中国太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,中国山西030025 [3]中国地震局地球物理研究所,中国北京100081

出　　处：《地震地磁观测与研究》2013年第1期36-40,共5页Seismological and Geomagnetic Observation and Research

基　　金：山西省地震局科研项目(SBK-1205)

摘　　要：利用CAP方法反演2010年4月4日大同—阳高4.6地震震源机制解,结果表明:此次地震为正断兼有斜滑活动,认为节面Ⅱ的走向、倾向及正断走滑特性与震中附近的六楞山山前断裂吻合,其为发震断裂的可能性较大。Focal mechanism solution of the Apr. 4, 2010 Datong-Yanggao earthquake of M 4.6 is inverted by the method of Cap. Mw=4.5,nodal plane is 89°, 39° and -56° for strike, dip and rake angles, respectively. The other nodal plane is 228°, 58°, -114°. The estimated focal depth is about 10 km, for normal with oblique slippery activity. Combined long axis direction of plane of extract position for sequence and fault of the old earthquake zone of the Datong- Yanggao earthquake of M 6.1, it is considered that the strike, dip and normal with strike-slip characteristic of the nodal plane II inosculate the Liulengshan fault near the epicenter, which is probably the fault generating earthquake.

关 键 词：大同地震 CAP方法 震源机制解 

分 类 号：P315.33[天文地球—地震学]