吉林松原5.8级震群震相特征  

Primary analysis on earthquake waveform characteristic of Songyuan M5.8 earthquake swarm

作　　者：卢燕红[1] 张洪艳[1] 刘轶男 陈聪[1] 陈闯 蔡宏雷[1] Lu Yanhong;ZAHNG Hongyan;LIU Yinan;CHEN Cong;CHEN Chuang;CAI Honglei(Jilin Earthquake Agency, Changchun 130117, China;Fengman Seismic Station, Jilin Province 132000, China)

机构地区：[1]吉林省地震局,中国长春130117 [2]丰满地震台,中国吉林132000

出　　处：《地震地磁观测与研究》2018年第1期67-72,共6页Seismological and Geomagnetic Observation and Research

基　　金：测震台网青年骨干培养专项(项目编号:20170608);中国地震局监测;预测;科研三结合课题(项目编号:160703)

摘　　要：选取2013年松原5.8级震群23个M_S≥3.0地震事件,通过地震波的振动持续时间、速度、周期、振幅等,进行震相识别,综合分析发现:该区域土层较厚,且震源相对较浅,面波较发育,波列的振动持续时间较长;地震震相主要以Pn、Sn、Pg、Sg、PmP、SmS为主:其中PmP、SmS震相在震中距70—110 km范围内较易识别;Pn、Sn震相在震中距150 km以上可较清晰的识别,随着震中距增大,Sn震相在震中距350 km以上将不易识别。In this paper,we collected23earthquake waveform(MS≥3.0)of Songyuan M5.8earthquake swarm in2013.We made the phase identification to the collected earthquake waveform through the earthquake duration of vibrations,velocitys,periods,amplitude and so on.By analyses:The waveforms have the amplified activate to amplitude because the soil layer is thicker and the source is relatively shallow.It leads to surface wave development,longer duration of earthquake vibration.Earthquake phase mainly contain Pn,Sn,Pg,Sg,PmP,SmS.PmP and SmS can easily identified between70km to110km.Pn and Sn can clearly identified after about150km.With the increasing of the epicenter distance,the Sn becomes hardly identified after about350km.

关 键 词：松原5.8级震群 地震震相 震相分析 

分 类 号：P315[天文地球—地震学]