PBO钻孔应变同震响应分析  

Analysis of Coseismic Response of PBO Borehole Strainmeters

作　　者：陈燚飞 吕品姬[1,2] CHEN Yifei;LU Pinji(Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA,40 Hongshance Road,Wuhan 430071,China;Wuhan Base of Institute of Crustal Dynamics,CEA,40 Hongshance Road,Wuhan 430071,China)

机构地区：[1]中国地震局地震研究所地震大地测量重点实验室,430071 [2]中国地震局地壳应力研究所武汉创新基地,430071

出　　处：《大地测量与地球动力学》2019年第7期765-770,共6页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震研究所基本科研业务费专项和中国地震局地壳应力研究所基本科研业务费专项(IS201526214)~~

摘　　要：以2017-09-08墨西哥8.1级地震为例,分析14个PBO综合钻孔应变仪和地震仪同址记录的地震波信号,结果表明,应变仪记录的地震波符合射线传播规律。对不同震中距的站点进行基于S变换的应变仪与地震仪的同震响应特征分析,二者同震响应一致性较好,应变仪频段主要在0.25Hz以下。取震后1h应变数据进行分析发现,同震阶段应变主方向指向震中。The PBO borehole strainmeter reaches 1 sps sampling.With the Mexico 8.1 earthquake on September 8,2017 as an example,we analyze the seismic signals of 14 strainmeters and seismeters,showing that the seismic waves recorded by strainmeters meet the radiation law of transmission.The characteristics of the coseismic response of strainmeters and seismeters based on S-transform are analyzed for stations with different epicenter distances,and the coseismic responses of the strainmeters are very coherent with the seismeters’signals.The frequency of the strainmeters is mainly below 0.25 Hz.After seismic time series data calculation,we find that,in the coseismic phase,the main direction of strain points to the epicenter.

关 键 词：PBO 钻孔应变 同震 应变主方向 

分 类 号：P315[天文地球—地震学]