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地震 ›› 2000, Vol. 20 ›› Issue (1): 85-90.

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深井电极与地表电极的自然电场对比研究

郑洪1, 王新蕾1, 王春媛1, 宋治平1, 李永林1, 路京林2   

  1. 1.北京市地震局,北京 100020;
    2.中国地震局分析预报中心,北京 100036
  • 收稿日期:1999-03-10 修回日期:1999-10-05 出版日期:2000-01-31 发布日期:2022-09-26
  • 作者简介:郑洪(1947一),男,高级工程师,主要从事地震前兆方法监测及地震分析预报研究。

Comparison study on natural electric deep-well electrode and surface electrode

ZHENG Hong1, WANG Xin-lei1, WANG Chun-yuan1, SONG Zhi-ping1, Li Yong-lin1, LU Jing-lin2   

  1. 1. Seismological Bureau of Beijing Municipality,Beijing 100080, China;
    2. Center for Analysis and Predicetion,CSB, Beijing 100036,China
  • Received:1999-03-10 Revised:1999-10-05 Online:2000-01-31 Published:2022-09-26

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摘要： 通过对半无限空间和全无限空间电流密度的分布理论进行讨论,得出电流密度随电极埋设深度的增大而减小。因此,在电法观测中,当供电电极深埋后,人工电场和自然电场可减少地表各种噪声的干扰,提高视电阻率ps和自然电位认Vsp。的灵敏度,从而更好地捕捉地震异常信息。从北京平谷台6年多来的观测结果分析认为,深井电极相对地表电极能降低诸如人为供电、雷击短路、冰冻期影响等各种干扰,经过宁河6.9级、6.5级和5.6级及离台站较近的三河4.8级地震的检验,表明深井电极可明显突出地震前的异常变化量。因此,自然电场的深井电极观测是值得推广的方法。

关键词: 深井电极, 地表电极, 自然电场, 地震前兆

Abstract: By means of discussion of current density distribution theory in semi-infinite and the whole spaee,the conelusion can be reached that current density is smaller when electrode at deeper depth. If the electrode is set at deeper depth,interference of surface noise of artificial and natural electric field can be decreased. Also precision and sensibility of apparent receptivity ps and natural potentla Vsp can be increased. So we can get more Information of earthquake anomaly. Applying the data of more than 6 years at Pinggu station in Beijing,we draw the following conclusion. Many kinds of interference,such as electrieity supply,short circuit caused by lightning stroke, glaeial period and so on can be decreased when deep-well electrode is used. After checking Ninghe Ms 6.9, Ms 6.5, Ms 5.6,and Sanhe Ms 4.8,earthuakes,we can also get that anomaly variation can be prominent when the deep-well electrode is used. Therefore,deep-well electrode observation of natural electric field is a good technique,which is worth spreading.

Key words: Deep-well electrode, Surface electrode, Natural electric field, Earthquake precursory

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