CAP方法反演山东长清M4.1地震震源机制解  

Focal Mechanism Solution of the Ji'nan M4.1 Earthquake Using the CAP Method

作　　者：董腾超 康艳蕊 崔鑫[1] 李铂[1] 张志慧[1] 张春鹏 DONG Tengchao;KANG Yanrui;CUI Xin;LI Bo;ZHANG Zhihui;ZHANG Chunpeng(Shandong Earthquake Agency,Ji'nan 250014,China;Shandong Zhengyuan Geophysical Information Technology co.ltd,Ji'nan 250101,China)

机构地区：[1]山东省地震局,济南250014 [2]山东正元地球物理信息技术有限公司,济南250101

出　　处：《华北地震科学》2020年第S01期86-89,94,共5页North China Earthquake Sciences

摘　　要：利用山东地震台网的地震波形资料,采用CAP方法反演山东长清M4.1地震的震源机制解和震源深度。结果显示,地震矩震级Mw=4.1,最佳震源深度为3.3 km,节面Ⅰ:走向219.0°,倾角57.0°,滑动角−156.0°;节面Ⅱ:走向115.4°,倾角70.1°,滑动角−35.4°。结合余震分布特征,判定震源机制解中节理Ⅱ为断层面,节理Ⅰ为辅助面。通过分析震中附近地质构造特征,得出距离震中较近的长清断裂和东阿断裂皆不是此次地震的发震断裂,初步判定在震中附近存在1条或者多条未探明的隐伏断裂。Based on the waveform data from digital seismic network of Shandong province and its adjacent regions,this article retrieved the focal mechanism solutions of the Jinan M4.1 Earthquake with the CAP(Cut and Paste Method)method.The results show that the moment magnitude is 4.1,the estimated focal depth is 3.3 km.The strike,dip and slip angles of two nodal planes of the best double couple solution are 219.0°,57.0°,−156.0°and 115.4°,70.1°,−35.4°.We infer that the planeⅡwas the fault plane with the analysis of the distribution of aftershocks.Both the Changqing fault and the Dong’e fault nearby the epicenter were not the seismogenic fault.Therefore,we assumed that there are one or several buried faults nearby Ji'nan earthquake.

关 键 词：CAP方法 震源机制解 山东长清M4.1地震 

分 类 号：P315.6[天文地球—地震学]