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地震 ›› 2003, Vol. 23 ›› Issue (4): 49-56.

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崇明异常电磁扰动与台湾7.5 级强震

马钦忠, 尹京苑, 顾学章   

  1. 上海市地震局, 上海 200062
  • 收稿日期:2002-12-05 修回日期:2003-03-13 出版日期:2003-10-31 发布日期:2021-12-21
  • 作者简介:马钦忠( 1959-), 男, 河南洛阳人, 副研究员, 2000 年获博士学位, 主要从事地球电磁学及地震预报等研究。
  • 基金资助:
    地震科学联合基金项目( 102080)

The electromagnetic anomalies observed at Chongming station and the Taiwan strong earthquake ( M =7.5, March 31, 2002)

MA Qi-zhong, YIN Jing-yuan, GU Xue-zhang   

  1. Seismological Bureau of Shanghai Municipality, Shanghai 200062, China
  • Received:2002-12-05 Revised:2003-03-13 Online:2003-10-31 Published:2021-12-21

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摘要： 2002 年3 月31 日14 时52 分在台湾以东海中发生7.5 级强地震, 地震发生前后上海市地震局崇明地震台电磁波仪器记录到了一系列强烈电磁辐射异常信息, 其中震前最早的信息出现在24 天前, 最迟的信息出现在震前5 小时且幅度最大。主震发生前电磁辐射异常信号的振荡幅度随着主震临近而增大, 主震发生后又降了下来。余震期间的电磁辐射异常信息也十分丰富。文中探讨了这些电磁辐射异常信号与强震之间的关系, 结合多种震例的记录认为这类震前电磁辐射异常信号可作为临震前的一种信息。为认识和丰富震前电磁辐射前兆异常的现象与研究增加了新的内容。

关键词: 台湾7.5 级地震, 短临预报, 电磁辐射异常, 信号特征

Abstract: A series of electromagnetic anomalies have been detected at the Chongming station in ultra-low frequency band ( ULFB) befo re the Taiw an earthquake ( M =7.5, March 31, 2002) with the following characteristics.The earliest electromag netic anomalies appeared in advance of 24 day s before the earthquake, and the latest appeared in advance of 5 hours before the mainshock, w hose amplitude is largest.The amplitudes of the elect romag netic anomalies increased gradually approaching the mainshock and decreased after the mainshock again.The abundant info rmation of the elect romag netic anomalies appeared in advance of many af tershocks.This paper mainly discusses the relation between the elect romagnetic anomalies and the strong earthquakes.The analysis reveals that the properties of the preseismic elect romagnetic anomalies might be considered as signatures of an impending earthquake.

Key words: Taiwan MS 7.5 earthquake, Impending prediction, Elect romag netic anomalies, Signal characteristics

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