用小波分析提取重力固体潮  

Extracting gravity tidal signal with wavelet analysis

作　　者：刘明辉[1] 周银兴[1] 叶鹏[2] 李江[1] 林湛[1] 陈阳[1] 

机构地区：[1]中国地震局地震预测研究所,中国北京100036 [2]北京港震机电技术有限公司,中国北京102628

出　　处：《地震地磁观测与研究》2014年第5期160-164,共5页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局地震预测研究所基本科研业务费专项(编号2010IES0201)资助

摘　　要：地球固体潮观测对验证各种地球模型、研究地球内部构造具有重要意义,可为地震预报提供重要的参考依据。BBVS-120甚宽带地震计具有较低的自噪声水平,在低频端输出信号的频率很低,涵盖固体潮信息频带范围。本文提出:BBVS-120地震计输出信号中存在周日波、半日波和1/3日波的固体潮信号,利用小波分析,提取垂直分量中的重力固体潮信号,并作调和分析。Earth solid tide is a cyclic deformation caused by attraction of Sun, Moon and other celes- tial bodies on the Earth. Earth solid tide observations have great significance in validating va- rious earth models and studying the internal structure of the Earth. It can also provide an im- portant reference for earthquake prediction. BBVS-120 very broadband seismometer has a lower noise level. Its output signal frequency is very low at the low frequency end, including tidal information frequency band. In this article, it is first proposed that there are diurnal tide, semidiurnal tide and 1/3 diurnal tide in output signal of BBVS-120 seismometer, and the method for extracting the gravity solid tide in the vertical signal from the seismometer with wavelet analysis and harmonic analysis.

关 键 词：甚宽带地震计 小波分析 重力固体潮 调和分析 

分 类 号：P315.72[天文地球—地震学]