地震学报Issue(3)：473-481,9.DOI:10.11939/jass.2015.03.010
重力仪与宽频带地震仪地震波信号分析及其在异常判定中的应用
Analysis of high-frequency signal recorded by gravimeter and broadband seismometer and its application to anomaly identification
摘要
Abstract
Taking the Tohoku,Japan,MS 9.0 earthquake on March 11,2011, and three typical earthquakes (near earthquake,teleseism,distant deep-focus earthquake)on 23 November 2013,for examples,the coseismic responses of JCZ-1 broadband digital seismometer and LaCoste-PET gravimeter were analyzed by means of frequency spectrum.Since the response range of design frequency for the two types of instruments are different,their signal acquisition capabilities and the signal spectral distribution are different.The predominant periods of seismometer are smaller than that of gravimeter.However,they still show well corresponding and comparability in response to the high-frequency crustal deformation signals. They response synchronously to those high-frequency seismic waves with period more than 1 s,and they have good consis-tence for teleseism wave recording.The characteristics of synchronous response to high-frequency crustal deformation signals recorded by gravimeter and broad-band seismometer provide physics index for those high-frequency anomalies occurred in gravity observation,which is significant to identification of earth-quake precursors probably appeared in deformation observation.关键词
重力仪/宽频带地震仪/地震波/频谱分析/异常判定Key words
gravimeter/broadband seismometer/seismic wave/frequency spec-trum analysis/anomaly identification分类
天文与地球科学引用本文复制引用
王梅,季爱东,徐长朋,王鹏,曲同磊,张明..重力仪与宽频带地震仪地震波信号分析及其在异常判定中的应用[J].地震学报,2015,(3):473-481,9.基金项目
国家科技支撑计划项目（2012BAK19B04-01）和山东省地震局重点科研基金项目（JJ1201）联合资助． （）
