| 2013年甘肃岷县—漳县交界Ms6.6地震序列双差定位研究 |
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| 引用本文： | 王未来,吴建平,房立华,来贵娟.2013年甘肃岷县—漳县交界Ms6.6地震序列双差定位研究[J].地震地磁观测与研究,2014,35(5):29-32. |
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| 作者姓名： | 王未来 吴建平 房立华 来贵娟 |
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| 作者单位： | 中国北京100081 中国地震局地球物理研究所 |
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| 摘 要： | 利用甘肃遥测台网2013年7月22日至9月22日的震相观测报告,对2013年7月22日07时45分甘肃省岷县漳县交界Ms 6.6地震的地震序列进行双差定位研究.结果表明,地震序列呈北西向分布,与临潭宕昌断裂的走向基本一致,地震分布长度约10 km.震源深度剖面显示断层面向西南倾斜,浅部倾角较陡,深部略缓,表现为“铲形”逆冲断层的特征.余震区存在一条向西南延伸的余震带,与发震断层相交成y字型,推测可能是逆冲推覆构造中常见的反冲断层.
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| 关 键 词： | 岷县-漳县交界 Ms6.6地震 地震序列 双差定位 |
Double difference relocation of the 2013 Minxian-Zhangxian Ms 6.6 earthquake sequences in Gansu Province |
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| Wang Weilai,Wu Jianping,Fang Lihua,Lai Guijuan.Double difference relocation of the 2013 Minxian-Zhangxian Ms 6.6 earthquake sequences in Gansu Province[J].Seismological and Geomagnetic Observation and Research,2014,35(5):29-32. |
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| Authors: | Wang Weilai Wu Jianping Fang Lihua Lai Guijuan |
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| Institution: | (Institute of Geophysics, China Earthquake Administration, Beij ing 100081, China) |
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| Abstract: | Using the seismic phase observation reports trom Gansu remote momtormg networks trom July 22 to September 22 in 2013, the earthquake sequences of the Minxian-Zhangxian Ms 6.6 earthquake （occurred at 07：45 on July 22, 2013） in Gansu Province are relocated by double difference algorithm. The results show that the earthquake sequences are distributed approx- imately 10 km in length in NW direction, which is basically consistent with the strike of the Lintan-Tanchang fault. According to the focal depth profiles, the fault planes dip to the northwest, and the dip angle is steep in the shallow crust and gentle in the deep crust, mani- festing itself as a listric thrust fault. A southwestward tilt aftershock belt is revealed inter- secting with the seismogenic fault with y-shape, which is speculated as a back thrust fault that often appears in a thrust fault system. |
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| Keywords: | Minxian-Zhangxian border Ms 6 6 earthquake earthquake sequences double difference relocation |
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