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地震 ›› 2019, Vol. 39 ›› Issue (3): 187-195.

• • 上一篇    

华北地区地震空区的统计分析

王霞, 宋美琴, 陈慧   

  1. 山西省地震局, 山西 太原 030021
  • 收稿日期:2019-03-25 出版日期:2019-07-31 发布日期:2019-08-09
  • 通讯作者: 宋美琴, 正研级高工。 E-mail: smq28@126.com
  • 作者简介:王霞(1987-), 女, 山西忻州人, 工程师, 主要从事地震综合预测等研究
  • 基金资助:
    国家重点研发计划项目(2017YFC1500502-01); 2017年度和2019年度震情跟踪专项工作任务(2017010109, 2019010106); 山西省科技攻关项目(20140313023-1, 20150313016-2); 基本科研业务专项(2017IES010105)

Statistical Analysis of Seismic Gap in North China

WANG Xia, SONG Mei-qin, CHEN Hui   

  1. Earthquake Administration of Shanxi Province, Taiyuan 030021, China
  • Received:2019-03-25 Online:2019-07-31 Published:2019-08-09

摘要: 对华北地区1970—2017年出现的地震空区采用统一的识别标准进行全时空清理研究, 结果表明, 华北地区M≥5地震前出现空区的比例为36.7%, 且华北地区ML≥3.0地震空区的持续时间与主震震级存在一定的线性正相关关系, 但长轴尺度、 起始震级与主震震级的线性关系不明显; 报准率为0.76, 虚报率为0.24, 漏报率为0.60, R值为0.32, 高于具有97.5%置信水平的R0值, 表明地震空区这种预测方法在华北地区具有较好的预报效果。

关键词: 地震空区, 华北地区, M≥5.0地震

Abstract: The seismic gaps in North China from 1970 to 2017 are analyzed using the unified identification criteria. The result shows that seismic gap before M≥5.0 earthquakes is 36.7% in North China. The relationship between the duration time of M≥3.0 earthquake has a certain linear positive correlation with the magnitude of main shock. However, the long axis scale, the initial magnitude and the main-shock magnitude don't have obvious linear relationship. The accuracy rate of seismic gap is 0.76, the false rate is 0.24, the missing rate is 0.60, and the R value is 0.32. R value is higher than R0 value with 97.5% confidence level. It indicates that the prediction method of seismic gap has certain forecast capability in North China.

Key words: Seismic gap, North China, M≥5.0 earthquakes

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