地电场观测典型干扰数据的修正方法

英文篇名：Correction methods on typical interference data of geoelectric observation
中文刊名：地震地磁观测与研究
英文刊名：Seismological and Geomagnetic Observation and Research
作者：马新欣 ; 李大虎 ; 张小涛 ; 刘晓灿 ; 焦立果
英文作者：Ma Xinxin~1) ; Li Dahu~2) ; Zhang Xiaotao~3) ; Liu Xiaocan~1) and Jiao Liguo~1) 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
中文关键词：地电场 ; 干扰因素 ; 经验模态分解 ; 带阻滤波 ; 汶川震例
英文关键词：geoelectric filed ; interference factors ; empirical mode decomposition ; bandstop filter ; Wenchuan earthquake
出版日期：2012-06-25
机构：中国地震局地球物理研究所;四川省地震局工程地震研究院;邯郸地震中心台;
年：2012
期：Z1
出版单位：地震地磁观测与研究

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。
In order to distinguish seismic precursory information,three interfernce types of the geoe-lectric 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.

引文

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