乾陵地震监测站钻孔体应变仪同震响应能力分析  

Analysis of coseismic response capability of volume borehole strain meter at Qianling Seismic Station

作　　者：张晨蕾 史春伟[1,2] 路小建 黄英[1,2] 辛建村 ZHANG Chenlei;SHI Chunwei;LU Xiaojian;HUANG Ying;Xin Jiancun(Shaanxi Earthquake Agency,Xi’an 710068,China;Shaanxi Xi’an Deep Earth Structure Observation and Research Station of China Earthquake Administration,Xi’an 710068,China)

机构地区：[1]陕西省地震局,西安710068 [2]陕西西安地球深部构造中国地震局野外科学观测研究站,西安710068

出　　处：《地震地磁观测与研究》2025年第1期109-114,共6页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局监测、预报、科研三结合课题(项目编号:CEA-SJH-202501056,3JH-202401115);2024年度震情跟踪定向工作任务(项目编号:2024010412)。

摘　　要：整理并分析2020—2023年乾陵地震监测站TJ-Ⅱ型体积式钻孔应变仪地震记录,发现可较准确地记录到国内6级和国外7级及以上地震。根据仪器记录的159次地震事件的震级M_(S)与震中距对数lgD关系图,计算得到乾陵站钻孔体应变映震能力公式。基于该站形变仪器同震响应记录,可知:震级相同时,同震响应最大变幅(A)随着震中距(D)的增大而减小;震中距相近时,同震响应最大变幅(A)随着震级(M_(S))的增大而增大。The seismic records of the TJ-Ⅱvolume borehole strain meter at Qianling Earthquake Monitoring Station from 2020 to 2023 are analyzed.The results show that the strain meter at Qianling Earthquake Monitoring Station can accurately record M_(S)≥6 earthquakes in China and M_(S)≥7 global earthquakes.Based on the relationship between the M_(S) and lgD of 159 earthquakes recorded by the instrument,the strain reflection ability formula of the volume borehole strain meter at the station is calculated.Based on the coseismic response records of the TJ-Ⅱvolume borehole strain meter at Qianling Earthquake Monitoring Station,the analysis results indicate that the maximum amplitude of the coseismic response(A)decreases with the increase of the epicentral distance(D)while the magnitudes are the same;when the epicentral distance is close,the maximum amplitude of coseismic response(A)increases with the increase of magnitude(M_(S)).

关 键 词：同震响应能力 同震响应最大变幅 震中距 震级 钻孔体应变仪 

分 类 号：P315.78[天文地球—地震学]