精河地震台伸缩仪不同频段的影响因素分析  

INFLUENCING FACTORS ANALYSIS OF DIFFERENT FREQUENCY BANDS OF EXTENSOMETER IN JINGHE SEISMIC STATION

作　　者：景孝复 杨斌 刘彦慧 邢绍志 王吉利 库尔班·阿卜力孜 JING Xiao-fu;YANG Bin;LIU Yan-hui;XING Shao-zhi;WANG Ji-li;Kuerban Abulizi(Bole seismic station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Bole 833400,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局博乐地震监测中心站,新疆博乐833400

出　　处：《内陆地震》2025年第1期77-84,共8页Inland Earthquake

基　　金：中国局三结合课题(CEA-SJH-202501072)资助.

摘　　要：为厘清精河地震台伸缩仪观测数据在不同频段的主要影响因素,采用快速傅里叶变换(FFT)方法对伸缩仪NS/EW向数据及气温、气压观测序列进行频谱分析。结果表明:①三者在年周期、日波、半日波及高频段均呈现显著同频特征;②NS向2^(6)~2^(7) min频段与EW向26~28 min频段数据与气压呈现强线性相关;③固体潮效应在观测数据中记录清晰,验证了数据的稳定性与可靠性;④气温是年周期频段的主导因素,NS向相位滞后气温77天,EW向滞后71天,经相位校正后二者呈显著线性关系。并且探讨了各频段干扰因子的作用特征及其物理机制,为形变观测数据的预处理与地球物理信号解译提供了理论依据。To clarify the primary influencing factors in different frequency bands of the strain measurement data from the Jinping seismic station,the Fast Fourier Transform(FFT)method was applied to analyze the spectral characteristics of the NS/EW components of the strain meter and temperature and pressure observation sequences.The results indicate:①significant in-phase features were observed in the annual,daily,semi-diurnal,and high-frequency bands among the three;②the NS component in the 2^(6)~2^(7) min frequency band and the EW component in the 26~28 min frequency band exhibited strong linear correlation with pressure;③solid tidal effects were clearly identified in the observation data,validating the stability and reliability of the data;④temperature was the dominant factor in the annual frequency band,with phase lags of 77 days for the NS component and 71 days for the EW component.After phase correction,the two components exhibited a significant linear relationship.Additionally,the roles of interference factors and their physical mechanisms at different frequency bands were explored,providing theoretical foundations for preprocessing deformation observation data and interpreting geophysical signals.

关 键 词：精河伸缩仪 频段 气压 气温 回归分析 

分 类 号：P315.7[天文地球—地震学]