| 首都圈地区震源机制解综合研究 |
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| 引用本文： | 武敏捷.首都圈地区震源机制解综合研究[J].中国地震研究,2014,28(1):79-90. |
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| 作者姓名： | 武敏捷 |
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| 作者单位： | 北京市地震局，北京市海淀区苏州街28号 100080 |
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| 基金项目： | This research was funded jointly by China Spark Program of Earthquake Science and Technology ( XH12001 ) ， Special research fund and Task contract of earthquake trend tracing in 2013 of Beijing Earthquake Administration ( 2013020109) ． |
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| 摘 要： | Comprehensive statistical analysis was performed on the basic features of focal mechanisms of 619 ML≥2.0 earthquakes which occurred in the capital circle area from January 2002 to June 2010. By dividing the capital area into three studying regions based on regional tectonic characteristics, cluster analysis was conducted on the focal mechanisms of all subregions using the longest distance method in the statistical cluster analysis to study the characteristics of tectonic stress tensors. The result shows that dominant P-axis azimuth distribution is NNE-NEE and that of T-axis is NNW--NWW, most of the focal areas are controlled by a horizontal stress field and rupture is mainly of horizontal strike-slip. The maximum principal compression stress orientation is NE75° in the west, NE62° in the middle, and near EW in the east of the capital area. The regional tectonic stress field is characterized by horizontal compression.
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| 关 键 词： | 首都圈地区 震源机制解 区域构造特征 区域构造应力场 中国 统计分析 聚类分析 地震发生 |
| 收稿时间： | 6/4/2012 12:00:00 AM |
Comprehensive Research on Focal Mechanism Solutions in the Capital Circle Area of China |
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| Wu Minjie.Comprehensive Research on Focal Mechanism Solutions in the Capital Circle Area of China[J].Earthquake Research in China,2014,28(1):79-90. |
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| Authors: | Wu Minjie |
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| Institution: | [1]Earthquake Administration of Beijing Municipality, Beijing 100080, China [2]First Crust Monitoring and Application Center,CEA,Tianjin 300180, China |
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| Abstract: | Focal mechanism solution Systematic cluster Stress tensor Capital circlearea |
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| Keywords: | Focal mechanism solution Systematic cluster Stress tensor Capital circle area |
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