地震地磁观测与研究2023，Vol.44Issue(6)：86-92,7.DOI:10.3969/j.issn.1003-3246.2023.06.013
北武当观测站洞体形变观测功率谱密度特征分析
Analysis of power spectral density characteristics of cave deformation observation at Beiwudang Observation Station
摘要
Abstract
Select the observation data of the normal and interference periods of the cave deformation measurement items from the Beiwudang Seismic Observation Station in Shanxi Province,calculate the power spectral density(PSD),and analyze the normal background characteristics of the cave deformation data and the corresponding changes in PSD values under different interferences.The results show that:① No interference:Under normal background,the daily PSD value of the observed data does not change much,which can reflect the PSD distribution with a maximum frequency of up to 8.3×10-3 Hz;②Bold curve:The PSD value of the interference day increases in the frequency band above 10-3 Hz,manifested as high-frequency interference;③Steps,jumps,and distortions:PSD values significantly increase across the entire frequency range;④ Trend change:PSD value does not change significantly;⑤ Seismic waves:As the coseismic effect increases,the frequency range and amplitude of PSD values increase.关键词
洞体形变/功率谱密度/背景噪声/干扰Key words
cave deformation/power spectral density/background noise/interference引用本文复制引用
高翠珍,王晓霞,孟彩菊,薛锦明,薛生瑞..北武当观测站洞体形变观测功率谱密度特征分析[J].地震地磁观测与研究,2023,44(6):86-92,7.基金项目
中国地震局地震监测、预报、研究三结合课题(项目编号:3JH-202301010) （项目编号:3JH-202301010）
山西省地震局青年项目(项目编号:SBK-2112) （项目编号:SBK-2112）
