忻州地震监测中心站YRY-4分量钻孔应变仪气压干扰定量识别及特征分析  

Quantitative identification and characteristic analysis of barometric interference of YRY-4 component borehole strain gauge at Xinzhou Seismic Station

作　　者：尚永明 SHANG Yongming(Xinzhou Earthquake Monitoring Center Station,Shanxi Earthquake Agency,Shanxi Province 034200,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Shanxi Province 030025,China)

机构地区：[1]山西省地震局忻州地震监测中心站,山西034200 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西030025

出　　处：《地震地磁观测与研究》2024年第5期131-136,共6页Seismological and Geomagnetic Observation and Research

基　　金：山西省地震局科研项目(项目编号:SBK-2409)。

摘　　要：选取忻州地震监测中心站所辖代县、原平、宁武、繁峙、神池5个子台四分量钻孔应变仪记录数据,采用S变换、回归分析和小波变换等分析方法,对各仪器气压干扰特征进行量化和对比分析。结果表明:气压对钻孔应变观测的影响具有普遍性,气压干扰信号的归一化优势频率分布在0—0.05 Hz;气压干扰系数具有各异性,5个子台2023年3—6月的日变化气压干扰系数分别为-2.5×10^(-9)/hPa、-2.6×10^(-9)/hPa、-1.3×10^(-9)/hPa、-2.1×10^(-9)/hPa、-91.1×10^(-9)/hPa,其中神池子台所受气压干扰程度最高。The data recorded by the four-component borehole strain gauges in five sub-stations of Xinzhou Seismic Station were selected.The characteristics of barometric interference were quantified and compared by S-transform,regression analysis,and wavelet transform.The results show that the influence of barometric pressure on borehole strain observation is universal,and the normalized dominant frequency distribution of barometric interference signals is in the band of 0-0.05 Hz.However,the interference coefficients of air pressure vary.From March to June 2023,the diurnal pressure interference coefficients of Daixian,Yuanping,Ningwu,Fanzhi,and Shenchi sub-stations are-2.5×10^(-9)/hPa,-2.6×10^(-9)/hPa,-1.3×10^(-9)/hPa,-2.1×10^(-9)/hPa,and-91.1×10^(-9)/hPa,respectively,and Shenchi Station has the highest degree of pressure interference.

关 键 词：YRY-4分量钻孔应变 S变换 气压干扰系数 

分 类 号：P315.7[天文地球—地震学]