易县台BBVS-120地震计记录重力固体潮能力分析

Gravity Tide Recording Ability of BBVS-120 Seismometer in Yixian Seismic Station

以河北省易县台BBVS-120甚宽频带地震计为研究对象,验证其垂直向地震记录波形中包含的长周期成分为重力固体潮,并运用小波变换方法提取地震记录中的固体潮信息;同时,通过对提取的固体潮信息进行Venedikov调和分析证明,易县地震台BBVS-120甚宽频带地震计可以记录重力固体潮信息。

Taking the BBVS-120 very broadband seismometer of Yixian seismic station as the research object,this article verified that the long-period component contained in the vertical seismic record is gravity tide.we extracted the tide information from the seismic record by wavelet transform method.Meanwhile,we analyzed the gravity tide information extracted from seismic record using Venedikov harmonic analysis.Our study show that the BBVS-120 very broadband seismometer of Yixian seismic station has the ability to record gravity tide.