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地震 ›› 2000, Vol. 20 ›› Issue (3): 25-28.

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一种前兆异常预报效能的检验方法

陈学忠, 黄辅琼, 吕晓健   

  1. 中国地震局分析预报中心,北京 100036
  • 收稿日期:1999-08-26 修回日期:1999-12-06 出版日期:2000-07-31 发布日期:2022-09-30
  • 作者简介:陈学忠(1963-),男,重庆市人,副研究员,1995年获博士学位,主要从事地震成因、地震预报、前兆机理等研究。

A evaluation method of prediction effectiveness of precursory anomalies

CHEN Xue-zhong, HUANG Fu-qiong, LU Xiao-jian   

  1. Center for Analysis and Prediction, CSB, Beijing 100036, China
  • Received:1999-08-26 Revised:1999-12-06 Online:2000-07-31 Published:2022-09-30

摘要: 给出了一种地震前兆预报效能的检验方法,以北京板桥水位观测资料为例,通过与随机异常和以一定时间间隔周期出现的均匀异常的预报效能进行对比,对其异常的预报效能进行了系统检验。 结果表明,北京板桥水位观测5日均值,通过维纳滤波后的残差值高于1倍均方差异常,对张北—唐山一带中等以上地震具有一定预报效能。以异常出现后80天的时宽做预报,此时 R 值可达0.43,可信度为70%以上。这一方法可用于对其他前兆观测台站或单测项预报效能的检验。

关键词: 地震前兆, 预报效能, 检验方法

Abstract: An evaluation method of prediction effectiveness of precursory anomalies is proposed,and the prediction effectiveness of water level anomaly at Banqiao station, Beijing,is evaluated by comparing with that of the random and regular anomalies. The results show that the five-day mean of the water level, taking the residual of Weinna filtering over the standard deviation as anomaly,can predict earthquakes with moderate magnitude along Zhangbei-Tangshan seismic belt.When the anomaly occurs,prediction with 80days time window can be made.In this case,R-value could reach 0.43and the confidence can be over 70%. This method can be applied to evaluate the prediction effectiveness of the precursory anomalies.

Key words: Earthquake precursor, Prediction effectiveness, Evaluation method

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