地震仪与钻孔应变仪联合测定近震Pg波速度  

Joint Measurement of Local Earthquake Pg Wave Velocity from Seismometer and Borehole Strainmeter

作　　者：赵树贤 张永庆 邱泽华 唐磊 ZHAO Shuxian;ZHANG Yongqing;QIU Zehua;TANG Lei(National Institute of Natural Hazards,MEM,1 Anningzhuang Road,Beijing 100085,China;China Earthquake Networks Center,5 Nanheng Street,Sanlihe,Beijing 100045,China)

机构地区：[1]应急管理部国家自然灾害防治研究院,北京市100085 [2]中国地震台网中心,北京市100045

出　　处：《大地测量与地球动力学》2023年第8期865-868,共4页Journal of Geodesy and Geodynamics

基　　金：中央级公益性科研院所基本科研业务费专项(ZDJ2018-17,ZDJ2017-10,ZDJ2012-11);国家自然科学基金(41374051,41974018)。

摘　　要：通过对比仁和台地震仪与钻孔应变仪观测曲线,采用滑动分析方法计算多个近震Pg波速度,综合考虑反射波影响和测定效度,最终测得仁和台近震Pg波速度为5.98 km/s,该值与云南2015地壳速度模型的上地壳P波速度很接近。本文工作表明,准确标定后的钻孔应变仪可以作为测震仪器使用,以弥补地震仪在观测低频事件时的不足。By comparing the observation curves of the seismometer and the borehole strainmeter at Renhe station,the Pg wave velocity of several local earthquakes is calculated by sliding analysis method.Considering the influence of reflection wave and the measurement validity,the Pg wave velocity of Renhe station is finally measured to be 5.98 km/s,which is very close to the P wave velocity of the upper crust of the Yunnan 2015 crustal velocity model.The work in this paper shows that the borehole strainmeter can be used as a seismic instrument after accurate calibration to make up for the deficiency of the seismometer in the observation of low frequency events.

关 键 词：地震仪 钻孔应变仪 近震Pg波速度 滑动分析法 测定效度 

分 类 号：P315[天文地球—地震学]