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地震 ›› 1998, Vol. 18 ›› Issue (2): 119-126.

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电离层异常能否作为地震前兆的研究

杜品仁1), 蒋和荣2), 郭兼善2)   

  1. 1)中国北京 100029 国家地震局地质研究所;
    2)中国北京 100080 中国科学院空间科学与应用研究中心
  • 收稿日期:1997-05-22 修回日期:1997-07-05 出版日期:1998-04-30 发布日期:2022-05-10
  • 作者简介:杜品仁,男,1939年8月出生,副研究员,主要从事固体潮、天文因素与地震的关系、地震中长期预报等研究工作。
  • 基金资助:
    地震科学联合基金资助课题(91037) .

RESEARCH ON POSSIBILITY OF IONOSPHERIC ANOMALIES AS AN EARTHQUAKE PRECURSOR

Du Pinren, Jiang Herong, Guo Jianshan   

  1. Institute of Geology, SSB, Beijing 100029, China;
    Center for Space Science and Application Research, Academia Sinica, Beijing 100080, China
  • Received:1997-05-22 Revised:1997-07-05 Online:1998-04-30 Published:2022-05-10

摘要: 分析日本4次地震前5个电离层垂测站资料,发现地震前后震中附近夜间电离层偶发E层的临界频率f0ES值多数呈下降趋势,少数呈增加趋势。分析国际地球物理年(IGY)期间多个地震震中附近电离层垂测站资料,得出f0F2参数变异的统计特性是震前有正扰趋势。本文对震源电场影响电离层的机制进行了探讨。研究表明,地震前的电离层异常有可能作为地震前兆。

关键词: 地震前兆, 电离层, 临界频率

Abstract: The data of 5 ionospheric vertical sounding stations before 4 earthquakes in Japan are analyzed. It is found that most of the critical frequencies of the E sporadic layer tended to decrease and the only few tended to increase around the epicenters before and after the earthquakes. The analytical results of ionospheric stations near 55 earthquake epicenters during International Geophysical Year (IGY) show that the statistical feature of fo F2 disturbances is positive tendency before earthquakes. This paper discussed the mechanism of influence of source electric field on ionosphere. This research indicates that there is possibility of ionospheric anomalies before earthquakes as a precursor.

Key words: Earthquake precursor, Iono sphere, Critical frequency