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地震 ›› 2000, Vol. 20 ›› Issue (2): 53-60.

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地磁加卸载响应比与地震对应关系研究

陈学庭, 杨钢宇, 陈修民, 乔玲, 余刚群   

  1. 浙江省地震局,浙江 杭州 310013
  • 收稿日期:1999-03-04 修回日期:1999-05-21 出版日期:2000-04-30 发布日期:2022-09-26
  • 作者简介:陈学庭(1950-),男,副教授, 主要从事地震学、地震预报及地倾斜、地磁等前兆研究。
  • 基金资助:
    浙江省重点科研资助项目(961103088)

Study on geomagnetic loading-unloading response ratio and earthquakes

CHEN Xue-ting, YANG Gang-yu, CHEN Xiu-min, QIAO Ling, YU Gang-qun   

  1. Seismological Bureau of Zhejiang province, Hang zhou 310013, China
  • Received:1999-03-04 Revised:1999-05-21 Online:2000-04-30 Published:2022-09-26

摘要: 通过对浙、沪、苏邻近 4个地磁观测点的近十年的资料,及邻近区域10个地震进行了每日Z分量日变幅加卸载响应比随时间变化和响应比月均值的相关研究。结果表明:加卸载响应比阈值P0(Z) 和响应比月均值PM(Z)的大小与地震的震级、震中距及异常出现的早晚并非完全呈线性相关;当响应比值大于某一阈值时,有可能发生一定震级的地震 ;按该方法结果综合分析,截止1998年9月底,未来1年左右的时间内在该研究区域或更大范围(含台湾区域)有可能发生6级左右的地震。该方法可作为分析预报手段参与中短期和短临地震趋势判断的一种新方法。

关键词: 地磁, 日变幅, 加卸载响应比, 阈值

Abstract: We calculated and analyzed about ten years′ data on geomagnetic loading-unloading response ratio value P (Z) from magnetic stations in Zhejiang, Shang hai and Jiang su Provinces, and studied the relation of ten earthquakes which occurred in the three provinces and their vicinity and changes of the P (Z) and its monthly averag evalue PM(Z). The results show that it is not acomplete linear correlation between the threshold value P0 (Z) or PM(Z) and the seismic m ag nitude or the epicentral distance or the o ccurrence time of anomalous P(Z) and PM (Z). When P(Z) ≥ P0(Z) at astation an earthquake maybe occur nearby.
On the basis of synthetic analysis by this method, a strong earthquake with MS ≥ 6.0 may occur in the research region or more largely area(including Taiwan area) within one year, by the end of September 1998. This method can be used as a new routine tool for judgement of the medium-short and short-term and imminent seismic tendency.

Key words: Geomagnetism, Dailyrange, Loading-unloading response ratio, Threshold value

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