| 2014年2月12日于田MS7.3级地震前后的微震活动集中区及对地震危险区的可能指示 |
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| 引用本文： | 胡朝忠,陈丹,杨攀新,熊仁伟,李长军.2014年2月12日于田MS7.3级地震前后的微震活动集中区及对地震危险区的可能指示[J].中国地震研究,2015,29(2):169-175. |
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| 作者姓名： | 胡朝忠 陈丹 杨攀新 熊仁伟 李长军 |
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| 作者单位： | 中国地震局地震预测研究所，北京 100036;中国地震局地震预测研究所，北京 100036;中国地震局地震预测研究所，北京 100036;中国地震局地震预测研究所，北京 100036;中国地震局第二监测中心，西安 710054 |
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| 基金项目： | This research was jointly supported by National Science Foundation of China (41302171)，Active Fault Exploration in China (60112304)，and Basic Scientific Research Funds of China Earthquake Administration (2014IES0401，2012IES010303)． |
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| 摘 要： | Since 2001, there have occurred in succession the 2001 Kunlun Mountains M S8. 1earthquake,the 2008 Wenchuan M S8. 0 earthquake,the 2010 Yushu M S7. 1 earthquake and the 2012 Lushan M S7. 0 earthquake in the periphery of the Bayan Har block. By comparison of the characteristics of seismic strain release variations before and after the Kunlun Mountains M S8. 1 earthquake in the same time length in the geodynamical related regions,we found that the seismic strain release was obviously enhanced after the earthquake in the Longmenshan area,Batang area,and the NS-trending valleys at the west of the Hot Spring Basin. The Wenchuan earthquake occurred in the first area,and the Yushu earthquake is related to the second area. After the earthquake rupture occurred on the East Kunlun fault zone on the northern boundary of the Bayan Har Block,crustal materials on the south side of the fault zone migrated to the southeast,leading to a concentration of tectonic deformation in the Longmenshan thrust belt, e ventually rupturing on the Longmenshan thrust belt. This earthquake case illustrates that seismicity enhancement zones are possibly prone to long-term destructive earthquakes. After the M S7. 3 earthquake in Yutian,Xinjiang on February 12,2014,earthquake frequency and seismic strain release markedly increased in the junction area between the eastern Qilian Mountain tectonic belt and the Altun Tagh fault zone,where more attention should be paid to the long-term seismic risk.
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| 关 键 词： | Seismic risk zone Seismic strain release Yutian M_S7.3 earthquake |
| 收稿时间： | 8/1/2014 12:00:00 AM |
Microseismic Concentration Zones before and after the February 12,2014 M_S 7.3 Yutian Earthquake and the Possible Indication of an Earthquake Risk Zone |
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| Hu Chaozhong,Chen Dan,Yang Panxin,Xiong Renwei and Li Zhangjun.Microseismic Concentration Zones before and after the February 12,2014 M_S 7.3 Yutian Earthquake and the Possible Indication of an Earthquake Risk Zone[J].Earthquake Research in China,2015,29(2):169-175. |
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| Authors: | Hu Chaozhong Chen Dan Yang Panxin Xiong Renwei and Li Zhangjun |
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| Institution: | Hu Chaozhong;Chen Dan;Yang Panxin;Xiong Renwei;Li Zhangjun;Institute of Earthquake Science,CEA;Second Monitoring and Application Center,CEA; |
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| Abstract: | |
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| Keywords: | Seismic risk zone Seismic strain release Yutian MS7 3 earthquake |
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