基于小波分解法对北武当观测站定点形变受气压影响的分析  

Analysis of Fixed-point Deformation Affected by Air Pressure at Beiwudang Observation Station Based on Wavelet Decomposition Method

作　　者：王晓霞[1,3] 史双双[2,3] 高翠珍[1,3] 吴昊昱[2,3] 薛生瑞[1,3] 安凯杰 薛锦明[1,3] WANG Xiao-xia;SHI Shuang-shuang;GAO Cui-zhen;WU Hao-yu;XUE Sheng-rui;AN Kai-jie;XUE Jin-ming(Taiyuan earthquake monitoring center station of Shanxi Earthquake Agency, Taiyuan, Shanxi 030025, China;Shanxi Earthquake Agency, Taiyuan, Shanxi 030021, China;National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan, Shanxi 030025, China)

机构地区：[1]山西省地震局太原地震监测中心站,山西太原030025 [2]山西省地震局,山西太原030021 [3]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西地震》2021年第3期32-36,共5页Earthquake Research in Shanxi

基　　金：山西省地震局科研项目(SBK—2012)。

摘　　要：通过小波分解法对北武当观测站定点形变观测数据,受气压干扰的典型事件进行分析研究。选取气压波动较大、受其他干扰因素较小的数据,采用db5小波基函数分解形变观测数据与同时段的气压观测数据,运用Matlab中corrcoef函数对不同频率的细节进行计算,得出水管仪受气压干扰较小,水平摆和伸缩仪含干扰的部分基本都分布在细节2~5阶中,研究成果可为地震观测分析提供基础数据。The typical events of fixed-point deformation observation data disturbed by air pressure at beiwudang observation station are analyzed and studied by wavelet decomposition method.The data with large pressure fluctuation and less interference by other factors are selected,the deformation observation data and the pressure observation data in the same period are decomposed by db5 wavelet basis function,and the details of different frequencies are calculated by using the corrcoef function in Matlab.It is concluded that the water pipe instrument is less disturbed by air pressure,and the parts with interference of horizontal pendulum and extensometer are basically distributed in order 2~5 of detail.The research results can provide basic data for seismic observation and analysis.

关 键 词：定点形变 小波分解 气压 

分 类 号：P315.725[天文地球—地震学]