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地震 ›› 2004, Vol. 24 ›› Issue (1): 50-54.

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雅江6.0级地震对西南地区近期地震形势的影响

彭克银   

  1. 中国地震局分析预报中心, 北京 100036
  • 出版日期:2004-01-31 发布日期:2021-11-29
  • 作者简介:彭克银(1964-), 男, 湖北嘉鱼人, 副研究员, 2000年获博士学位, 主要从事地震活动性等研究。
  • 基金资助:
    国家自然科学基金项目(10232050); “十五”国家科技攻关项目(2001BA601B02-01-05-01)

The influence of Yajiang earthquake with MS6.0 on the seismic tendency in Southwest China region

PENG Ke-yin   

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

PDF (PC)

摘要： 分析了西南地区的活动构造、 应力场特征, 统计了川滇菱形块体内部理塘-德巫断裂上发生的中强地震与川滇及其附近地区大地震的对应关系。 结果表明, 1900～2000年理塘-德巫断裂上发生的6次5.5级以上地震有5次在其后2～3年内, 川滇菱形块体边界带及其附近地区发生了7.5级以上地震。 反之, 1900年以来西南地区共发生7.5级以上地震7次, 其中5次地震前2～3年内理塘-德巫断裂上均发生了5.5级以上地震。 在此统计基础上讨论了2001年2月23日雅江6.0级地震对西南地区近期地震形势的影响。

关键词: 川滇菱形块体, 雅江地震, 地震形势

Abstract: Based on analyzing the characteristics of active tectonics and stress field in Southwest China region, the statistical correlation between moderately strong earthquakes along Litang-Dewu fault and great earthquakes in Sichuan-Yunnan and its neighboring areas reveals that among 6 earthquakes with M>5.5 occurred along Litang-Dewu fault during 1900~2000, there were 5 earthquakes, after each of which 2~3 years, a strong earthquake with M>7.5 occurred on the boundary zone of the Sichuan-Yunnan rhombic block and its adjacent region. On the contrary, there were totally 7 earthquakes with M>7.5 occurred in Southwest China region, among which 2~3 years before each of 5 earthquakes, there were earthquakes with M<5.5 occurred along Litang-Dewu fault. On the basis of the statistical data the author discussed the influence of Yajiang earthquake with M=6.0 on Feb.23, 2001 on recent tendency in Southwest China region.

Key words: Sichuan-Yunnan rhombic block, Yajiang earthquake, Earthquake tendency

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