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地电场观测典型干扰数据的修正方法
引用本文:马新欣,李大虎,张小涛,刘晓灿,焦立果.地电场观测典型干扰数据的修正方法[J].地震地磁观测与研究,2012,33(3):159-163.
作者姓名:马新欣  李大虎  张小涛  刘晓灿  焦立果
作者单位:1. 中国北京100081 中国地震局地球物理研究所
2. 中国成都610041 四川省地震局工程地震研究院
3. 中国河北056001 邯郸地震中心台
基金项目:中央级公益性科研院所基本科研业务专项
摘    要:研究由于线路故障、直流供电等干扰因素引起的地电场数据变化,尝试使用带阻滤波、经验模态分解等方法排除干扰。处理结果表明,上述方法可以减少干扰因素的影响,有利于提取地震前兆信号。

关 键 词:地电场  干扰因素  经验模态分解  带阻滤波  汶川震例

Correction methods on typical interference data of geoelectric observation
Ma Xinxin , Li Dahu , Zhang Xiaotao , Liu Xiaocan , Jiao Liguo.Correction methods on typical interference data of geoelectric observation[J].Seismological and Geomagnetic Observation and Research,2012,33(3):159-163.
Authors:Ma Xinxin  Li Dahu  Zhang Xiaotao  Liu Xiaocan  Jiao Liguo
Institution:1) Institute of Geophysics, China Earthquake Administration, Beijing 100081, China 2) Institute of Engineering Seismology, Earthquake Administration of Sichuan Province, Chengdu 610041, China 3) Handan Seismic Station, Hebei Province 056001, China
Abstract:In order to distinguish seismic precursory information, three interfernce types of the geoelectric field variation affected by line fault, power supply etc. We eliminate interference with the method of empirical mode decomposition, bandstop filter etc. The result shows that with this method, useful information can be provided for seismic precursory information and better effect can be obtained. We analysis HHT time-frequency spectrum observed at the stations around the epicenter of Wenchuan after the interference factors have be removed. The result shows that the increased power spectrum was recorded at Xiaomiao and Hugu Seismic Stations on May 12, 2008.
Keywords:geoelectric filed  interference filter  Wenchuan earthquake factors  empirical mode decomposition  bandstop
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