2010年1月24日山西河津-万荣M_s 4.8地震特征  

Characteristics of Hejin-Wanrong M_s 4.8 earthquake on January 24,2010

作　　者：宋美琴[1] 李斌[1] 吕芳[1] 刘素珍[1] 王秀文[1] 梁向军[1] 

机构地区：[1]山西省地震局,中国太原030021

出　　处：《地震地磁观测与研究》2012年第1期18-22,共5页Seismological and Geomagnetic Observation and Research

基　　金：山西省科技攻关项目(20100311129-2);中国地震局星火计划(xh1005);中国地震局监测预报司工作项目"震后早期趋势快速判定预案"

摘　　要：分析2010年1月24日山西河津-万荣M_s 4.8地震序列特征,利用P波初动及振幅比和波形反演CAP两种方法计算震源机制解,结合本次地震的地质构造和历史地震活动背景、震源机制、余震分布、极震区长轴方向等分析,结果表明,隐伏的西辛封断裂为发震构造的可能性较大。On January 24th, 2010, an earthquake with magnitude of 4.8 occurred between Hejin and Wanrong areas. In this paper, the characteristics of this earthquake sequence are studied and the focal mechanism solution is calculated using two methods of P-wave first motion and amplitude ratio and waveform inversion CAP. In addition, the trace of earthquake sequence and the judgment of further earthquake trendy are carried out based on multi-methods and inde- xes including sequence parameters, earthquake type distribution of historical earthquakes, focal mechanism solution and apparent stress. The seismogenic structure of this earthquake is also analyzed combining the geology structure, seismic active background of historical earthquakes, focal mechanism solution, aftershock distribution, direction of long-axis of meizoseismal area and accurate locations. The results indicate that Xixinfeng concealed fault has much larger possibility to be the seismogenic structure.

关 键 词：河津-万荣Ms4.8地震 地震参数 地震序列 发震构造 

分 类 号：P315[天文地球—地震学]