| 云南及邻区环境剪应力场时间分布与强震活动 |
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| 引用本文： | 王绍晋,张俊伟,王赟赟,李忠华.云南及邻区环境剪应力场时间分布与强震活动[J].地震研究,2004,27(2):165-172. |
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| 作者姓名： | 王绍晋 张俊伟 王赟赟 李忠华 |
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| 作者单位： | 云南省地震局,昆明,650041;云南省地震局,昆明,650041;云南省地震局,昆明,650041;云南省地震局,昆明,650041 |
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| 基金项目： | 地震联合基金 ( 10 0 14 8)，云南省自然科学基金 ( 2 0 0 0D0 0 90M)资助 |
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| 摘 要： | 对云南及邻区环境剪应力场时间变化作了分析研究，表明因高剪应力值地震在时间上的集中分布，而形成了环境剪应力场显著增强的时段。高剪应力值地震的发生是构造应力场增强的直接表征，环境剪应力场高值分布区和高剪应力值地震集中发生时段的出现，与强震活动的时空分布密切相关。追踪分析环境剪应力场的时间变化，是地震危险性中、短期预测的行之有效的一种方法。环境剪应力场不同时间段的变化，可能为地震的中期和短期预测提供相应的应力场前兆性变化判据。
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| 关 键 词： | 地震活动性 环境剪应力场 时空分布 中短期预测 云南及邻区 |
Time Distribution of Environmental Shear - stress Field and Macroseismicity in Yunnan and the Neighbouring Region |
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| Wang Shaojin,Zhang Junwei,Wang Yunyun,Li Zhonghua.Time Distribution of Environmental Shear - stress Field and Macroseismicity in Yunnan and the Neighbouring Region[J].Journal of Seismological Research,2004,27(2):165-172. |
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| Authors: | Wang Shaojin Zhang Junwei Wang Yunyun Li Zhonghua |
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| Abstract: | The variation of the environmental shear-stress field with time in Yunnan and the neighbouring region is studied.The earthquakes with high shear-stress values clustered in an interval caused the period in which the environmental shear-stress field notably enhanced.The occurrence of earthquakes with high shear-stress values is the obvious symbol of enhancement of tectonic stress field.The areas where the high shear-stress value distributes and the periods in which the earthquakes with high shear-stress values cluster are closely related to the spatio-temporal distribution of strong seismic activity.So, analyzing the variation of the environmental shear-stress field with time is an effectual method to the medium and short-term earthquake prediction.The different variation of the environmental shear-stress field in different period of time may be a criterion for the medium and short-term earthquake prediction. |
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| Keywords: | the environmental shear-stress field variation of time the medium and short-term earthquake prediction Yunnan and the neighbouring region |
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