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地震 ›› 2007, Vol. 27 ›› Issue (增刊): 160-169.

• 地电场研究 • 上一篇    

地电场数据的功率谱和小波分析

郑兆苾, 张军, 何康   

  1. 安徽省地震局, 安徽 合肥 230031
  • 收稿日期:2006-05-29 修回日期:2006-07-25 出版日期:2007-06-30 发布日期:2021-10-29
  • 作者简介:郑兆苾(1946-), 女, 湖南长沙人, 研究员, 主要从事地震预报等研究。
  • 基金资助:
    国家科技基础条件平台重点项目(2004DEA71000)

Power spectrum and wavelet analysis of geoelectric field data

ZHENG Zhao-bi, ZHANG Jun, HE Kang   

  1. Earthquake Administration of Anhui Province, Hefei 230031, China
  • Received:2006-05-29 Revised:2006-07-25 Online:2007-06-30 Published:2021-10-29

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摘要： 对近年多台地电场资料的分钟值和整点值数据进行功率谱和小波分析, 认识到大地电场包含丰富的周期成份, 从几分钟到一月的周期成分都可通过功率谱检测到, 应用功率谱方法还可以识别地电场的干扰频段。 通过一维离散小波变换, 可以提取多台不同频段在相同时间段的同步变化特征, 并可以识别不同台站的局部趋势变化差异和某些干扰频段。

关键词: 地电场, 大地电场, 功率谱, 小波分析

Abstract: Power spectrum and wavelet analysis of minute and hour value data of geoelectric field at many stations in the recent years have been completed, the results show that telluric field contains abundant periods. Periods from minutes to months all can be detected by power spectral analysis, and the power spectrum can also identify the interference frequency of the geoelectric field. Through one-dimension discrete wavelet transform, we can extrate the synchronous variation of some wave band within the same time interval at many stations, and can identify the local trend differences among different stations and interference wave bands at some stations.

Key words: Geoelectric field, Telluric field, Power spectrum, Wavelet analysis

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