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地震 ›› 2004, Vol. 24 ›› Issue (1): 1-6.

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巨大地震前一种与活动地块相关联的5级地震异常活动现象

张晓东, 王慧敏, 吕梅梅   

  1. 中国地震局分析预报中心,北京 100036
  • 修回日期:2003-09-16 出版日期:2004-01-31 发布日期:2021-11-29
  • 作者简介:张晓东(1962-), 男, 北京延庆人, 1988年获硕士学位, 研究员, 主要从事地震活动性和地震预测等研究。
  • 基金资助:
    “十五”国家科技攻关项目(01-05-07); 国家863项目(2001AA115012)

Anomaly phenomenon of seismicity with M≈5.0 associated with active block before great strong earthquakes

ZHANG Xiao-dong, WANG Hui-min, LU Mei-mei   

  1. Center for Analysis and Prediction, CSB, Beijing 100036, China
  • Revised:2003-09-16 Online:2004-01-31 Published:2021-11-29

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摘要： 通过对中国大陆1900年以来所有的12次M≥7.7地震前5级地震活动特征进行详细的研究和分析, 包括分析发生的5级以上地震距未来巨大地震的时间间隔, 5级以上地震发震位置和未来巨大地震位置的关系。 结果表明, 在M≥7.7地震前1年内, 在600 km范围内至少发生1次5级以上地震。 发生的5级地震位置一般在未来M≥7.7地震所在的活动地块同一边或对边。 研究认为, 无论未来M≥7.7地震前5级以上地震是活跃还是平静状态, 这一现象都存在, 具有普适性特点。

关键词: 巨大地震, 活动地块, 5级地震

Abstract: By studying and analyzing the characteristics of seismicity with MS≥5.0 before twelve great strong earthquakes (MS≥7.7), the time interval of MS≥5.0 earthquakes and great strong earthquakes, and the location of the earthquakes with MS≥5.0 and MS≥7.7, it indicates that one year before the earthquakes with M≥7.7 and within the range of 600 km2, at least one earthquake with M>5.0 occurs. The location of earthquakes with M>5.0 are usually situated on the same or opposite side of the active block, where the earthquakes with M≥7.7 will occur. No matter what seismicity with MS≥5.0 is active and quiet, this phenomenon occurs everywhere and typical.

Key words: Great strong earthquake, Active block, Earthquake with M≈5.0

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