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地震

地震 ›› 1998, Vol. 18 ›› Issue (1): 97-101.

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地震前电磁辐射信息特征研究

张学民, 武有文   

  1. 中国石家庄 050021 河北省地震局预报中心
  • 收稿日期:1997-01-02 修回日期:1997-04-23 出版日期:1998-01-31 发布日期:2022-05-10
  • 作者简介:张学民,女,1969年11月出生,助理工程师,主要从事地电阻率和电磁辐射的分析预报研究工作．

STUDY ON FEATURE OF ELECTROMAGNETIC RADIATION INFORMATION BEFORE EARTHQUAKE OCCURRENCE

Zhang Xuemin, Wu Youwen   

  1. Seismological Bureau of Hebei Province ,Shijiazhuang 050021,China
  • Received:1997-01-02 Revised:1997-04-23 Online:1998-01-31 Published:2022-05-10

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摘要： 反映电磁辐射信息的地震前异常变化很多,但都有一个震前平静—加强—平静然后发震的特征。为了更好地体现这种特征,根据十几年来河北廊坊电磁台网的观测资料,通过给不同强度段的各台日信息量赋予不同的权值,并把当日各台权值累加来反映当日内多台信息量集中的强弱,然后把上述权累加和用一种不连续积分的方法反映异常的持续时间。通过对监测范围内4次MS≥5.0 地震震例分析,发现该方法反映震前异常特征明显,短临效果很好。同时也对其累加强度、持续时间与地震的关系以及这种特征的物理机制进行了探讨。

关键词: 电磁辐射, 信息量, 权积分

Abstract: Many kings of values are used to express electromagnetic radiation information, but there is a common feature of quieting-intensifying-quieting before earthquake occurrence. Over ten years observational data from Langfang Electromagnetic Network in Hebei Province are used in this paper to better reflect this feature. The various weight values are given to Electromagnetic Radiation Information Values of various intensity sections, then the weight of every station is accumulated to reflect the intensity of the information amount in that day, and weight accumulation is integrated intermittently to express the anomaly duration. By analyzing four earthquakes (MS≥5. 0) in supervising range, this method is found better in reflecting the short-term and impending anomaly feature before earthquake occurrence. Meanwhile the relation of the accumulated intensity, the duration with the earthquake and physical mechanism of the anomaly feature has been discussed.

Key words: Electromagnetic radiation, Information amount, Weight, Integral