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地震 ›› 1999, Vol. 19 ›› Issue (2): 168-178.

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华北北部几次中强地震前的地磁前兆特征

黄雪香1), 张美仙2), 林云芳3), 张淑兰1)   

  1. 1)中国北京 100036 中国地震局分析预报中心;
    2)中国太原 030002 山西省地震局;
    3)中国北京 100081 中国地震局地球物理研究所
  • 收稿日期:1998-04-27 修回日期:1998-10-05 出版日期:1999-04-30 发布日期:2022-09-19
  • 作者简介:黄雪香,女, 1947年 12月出生,高级工程师,主要从事地磁前兆、地震预报等研究工作。

CHARACTERISTICS OF GEOMAGNETIC PRECURSORY ANOMALIES BEFORE THE MODERATELY STRONG EARTHQUAKE IN NORTH CHINA

Huang Xuexiang1), Zhang Meixian2), Lin Yunfang3), Zhang Shulan1)   

  1. 1)Cen ter for Analysis and Prediction, CSB, Beijing 100036, China;
    2)Seis mological Bureau of Shanxi Province, Taiyuan 030002, China;
    3)Ins titute of Geophysics, CSB, Beijing 100081, China
  • Received:1998-04-27 Revised:1998-10-05 Online:1999-04-30 Published:2022-09-19

摘要: 阐述并分析了华北北部几个中强地震前地磁前兆异常的时空特征,即以在震前几天到几个月出现的中短期、短临前兆异常为主,短临异常尤为突出,空间分布范围较大。 异常展布有一定规律性,并与地震有较好的对应关系。

关键词: 中强地震, 地磁异常, 前兆特征

Abstract: In this paper, the authors describe the geomag netic precursory anomalies observed be-fore the moderately strong earthquake in North China and analyse their characteristics of time process and spatial distribution. The results indicate that the mid-term, short-term and imminent anomalies of geomagnetic precursors occurred several days to several months before the earthquakes, and the distribution of precursory anomalies is of a certain regu-larity and shows a certain corresponding relation with the earthquake occurrence.

Key words: Moderately strong earthquake, Geomagnetic anomaly, Precursory char-acteristics