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地震 ›› 2001, Vol. 21 ›› Issue (3): 8-14.

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华北b值全时空扫描结果的可靠性及与地震的相关性

郑兆苾, 刘东旺, 沈小七, 汪雪泉   

  1. 安徽省地震局,安徽合肥 230031
  • 收稿日期:2000-12-12 修回日期:2001-03-06 出版日期:2001-07-31 发布日期:2022-06-02
  • 作者简介:郑兆(1946-),女,湖南长沙人,研究员,主要从事地震预报等研究。
  • 基金资助:
    地震科学联合基金资助项目(95-07-431)

Reliability of time-space scanning results of b value and correlativity between b vales and earthquakes with M≥5.0 in North China

ZHENG Zhao-bi, LIU Dong-wang, SHEN Xiao-qui, WANG Xue-quan   

  1. Seismological Bureau of Anhui Province, Hefei 230031, China
  • Received:2000-12-12 Revised:2001-03-06 Online:2001-07-31 Published:2022-06-02

摘要: 用常规方法计算得到1970~1999年华北b值全时空扫描结果,详细分析了影响结果可靠性的多种因素,用模糊相关分析方法得到不同参数计算的b值与对应地震震级的模糊矩阵和模糊推理结果。认为,当用2°×2°进行全时空扫描时,不能提取出b值异常指标。以地震为研究对象划定研究区,结果显示,有异常有地震的信息明显高于有异常无地震的信息量,可取b<0.65为异常指标。

关键词: b值, 模糊相关, 华北

Abstract: Authors have got the time-space scanning results of b values from 1970~1999 in North China, they analyzed in detail several elements influencing reliability of the results, and obtained fuzzy matrixes and fuzzy results as well. The results show that anomalous indices of b values cannot be determined in the whole time-space range of 2°×2° unit. However, when the seismic anomalous information is bigger than aseismic one, and the research ranges are selected considering the epicenter of earthquake with M≥5.0 and its neighboring area, b<0.65 can be taken as the anomalous indices.

Key words: b value, Fuzzy correlativity, North China

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