| 2013年7月22日岷县漳县6.6级地震震源机制解 |
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| 引用本文： | 李晓峰,裴惠娟,徐辉,张辉.2013年7月22日岷县漳县6.6级地震震源机制解[J].西北地震学报,2013,35(3):459-462. |
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| 作者姓名： | 李晓峰 裴惠娟 徐辉 张辉 |
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| 作者单位： | 甘肃省地震局;;中国科学院国家科学图书馆兰州分馆/中国科学院资源环境科学信息中心;;甘肃省地震局;;甘肃省地震局; |
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| 基金项目： | 中国地震局兰州地震研究所地震科技发展基金(2012M02);国家自然科学基金(41304048、41174059) |
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| 摘 要： | 利用甘肃"十五"数字地震台网的波形资料,采用CAP方法反演了2013年7月22日岷县漳县6.6级地震的震源机制解。结果显示:本次地震的震源性质为逆冲兼走滑型,矩震级MW6.1,震源矩心深度为7km。最佳双力偶节面Ⅱ走向304°,倾角64°,滑动角44°,其走向与附近的临潭-宕昌断裂的走向一致;倾角和滑动角,表现为左旋走滑的特性与临潭-宕昌断裂的性质相符合,判定该节面代表了主震的发震断层面。分析认为岷县漳县6.6级地震的发生与该断裂的活动密切相关。
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| 关 键 词： | 岷县漳县MS6.6地震 CAP方法 震源机制解 |
Focal Mechanism of the Minxian-Zhangxian M_S6.6 Earthquake |
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| LI Xiao-feng;,PEI Hui-juan;,XU Hui; and ZHANG Hui;.Focal Mechanism of the Minxian-Zhangxian M_S6.6 Earthquake[J].Northwestern Seismological Journal,2013,35(3):459-462. |
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| Authors: | LI Xiao-feng; PEI Hui-juan; XU Hui; and ZHANG Hui; |
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| Institution: | Earthquake Administration of Gansu Province;;Lanzhou Branch of the National Science Library/Scientific Information Center for Resources and Environment,Chinese Academy of Sciences;;Earthquake Administration of Gansu Province;;Earthquake Administration of Gansu Province; |
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| Abstract: | The Chinese seismological station net determined that an MS6.6 earthquake occurred on July 22,2013,at 7:45CST at the border of Minxian and Zhangxian counties in Gansu Province. By the end of August 26,1300aftershocks had occurred in the seismic region of the main earthquake,including one of 5.0~5.9level,one of 4.0~4.9level,and nine of 3.0~3.9level.The largest,with magnitude of 5.6,occurred at 9:12on July 22.This earthquake caused heavy casualties and economic losses. In this study,the cut-and-paste(CAP) method was used to determine that the earthquake was thrust and strike-slip,MWwas 6.1,and the focal depth was 7km.The nodal plane II parameters of the best double-couple are strike 304°,dip 64°,and rake 44°.The strike of the nodal plane had the same trend as that of the Lintan-Tanchang fault,and the characteristic of dip and slip represent left lateral slip,which also corresponds to the Lintan-Tanchang fault.The nodal plane is representative of the seismogenic fault plane.Therefore,the Minxian-Zhangxian Ms6.6earthquake is in osculating correlation with activity of the Lintan-Tanchang fault. |
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| Keywords: | Minxian-Zhangxian MS6 6 earthquake CAP method focal mechanism |
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