| 雅江6.0级地震对西南地区近期地震形势的影响 |
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| 引用本文： | 彭克银.雅江6.0级地震对西南地区近期地震形势的影响[J].地震,2004,24(1):50-54. |
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| 作者姓名： | 彭克银 |
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| 作者单位： | 中国地震局分析预报中心, 北京 100036 |
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| 基金项目： | 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) |
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| 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。
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| 关 键 词： | 川滇菱形块体 雅江地震 地震形势 |
| 文章编号： | 1000-3274(2004)01-0050-05 |
| 修稿时间： | 2003年8月4日 |
The influence of Yajiang earthquake with MS6.0 on the seismic tendency in Southwest China region |
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| PENG Ke-yin.The influence of Yajiang earthquake with MS6.0 on the seismic tendency in Southwest China region[J].Earthquake,2004,24(1):50-54. |
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| Authors: | PENG Ke-yin |
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| Institution: | Center for Analysis and Prediction, CSB, Beijing 100036, China |
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| 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. |
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| Keywords: | Sichuan-Yunnan rhombic block Yajiang earthquake Earthquake tendency |
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