| 地电场多极距观测装置系统与文安M_s5．1地震前首都圈地电场异常研究 |
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| 引用本文： | 马钦忠.地电场多极距观测装置系统与文安M_s5．1地震前首都圈地电场异常研究[J].地震学报,2008,30(6). |
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| 作者姓名： | 马钦忠 |
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| 作者单位： | 中国上海,200062,上海市地震局 |
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| 摘 要： | 2006年7月4日河北文安县发生了Ms5.1地震,有6个地电场观测台布设在北京周围.本文阐述了地电场多极距观测系统的噪音识别原理及其在地电场数据分析中的应用方法.通过对首都圈6个地电场台观测资料的研究分析,在所选出的众多震前地电场异常信号中逐一排除,最后选定的5组地电场异常信号基本上被认为是震前地电场前兆异常信号.结果表明:①文安Ms5.1地震前存在着地电场异常前兆信号;②文安地震前地电场异常前兆信号的出现存在着"敏感点"效应;③地电场异常前兆信号在不同的台站存在着不同步出现的现象,并且异常结束至发震时间间隔也不同;④离震中区较近的宝坻台记录到的震前地电场异常幅度较小,而离震中区较远的昌黎台记录到的震前地电场异常幅度则较大.
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| 关 键 词： | 文安地震 地电场 多极据观测 信号识别 |
Multi-dipole observation system and study on the abnormal variation of the geoelectric field observed at Capital Network before the 2006 Wen'an,Hebei of China,M_s5.1 earthquake |
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| Ma Qinzhong.Multi-dipole observation system and study on the abnormal variation of the geoelectric field observed at Capital Network before the 2006 Wen''an,Hebei of China,M_s5.1 earthquake[J].Acta Seismologica Sinica,2008,30(6). |
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| Authors: | Ma Qinzhong |
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| Institution: | Earthquake Administration of Shanghai Municipality;Shanghai 200062;China |
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| Abstract: | On July 4,2006,an M_(?)5.1 earthquake occurred in Wen'an county of Hebei Province,near Beijing.Six geoelectric field monitoring stations have been in operation for several years around the Beijing area to examine the rela- tionship between electric field changes and earthquakes.This paper firstly ex- plains the principle of the eliminating noise method by using multi-dipole obser- vation system of the geoelectric field.Then the data observed at the stations are studied and a lot of abnormal signals precedin... |
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| Keywords: | Wen'an earthquake geoelectric field multi-dipole observation signal recognition |
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