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Tan Yipei, Cao Jingquan, Bian Zhenfu, Liu Wenbing, Deng Li, Xu Ke. 2014: Missing earthquakes detection and seismogenic structure of the Yuxian earthquake swarm in August of 2013. Acta Seismologica Sinica, 36(6): 1022-1031. DOI: 10.3969/j.issn.0253-3782.2014.06.004
Citation: Tan Yipei, Cao Jingquan, Bian Zhenfu, Liu Wenbing, Deng Li, Xu Ke. 2014: Missing earthquakes detection and seismogenic structure of the Yuxian earthquake swarm in August of 2013. Acta Seismologica Sinica, 36(6): 1022-1031. DOI: 10.3969/j.issn.0253-3782.2014.06.004
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Missing earthquakes detection and seismogenic structure of the Yuxian earthquake swarm in August of 2013

  • 1.

    Earthquake Administration of Tianjin Municipality, Tianjin 300201, China

  • 2.

    Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

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  • Received Date: April 09, 2014
  • Revised Date: July 23, 2014
  • Published Date: October 31, 2014
    Graphical Abstract
    • Abstract
  • The increasing seismicity of small earthquake swarms have been observed in North China area during recent years. Due to the lack of digital waveform recordings of large earthquakes in this area, detailed seismogenic structure analysis of earthquake swarms is of significance to seismic risk analysis and earthquake tendency judgement. We herein used matched filter technique to detect missing earthquakes in Yuxian small earthquake swarm occurred during August 22nd to 25th, 2013. By the technique we detected 18 missing earthquakes, which are about 1.38 times of 13 listed in the catalog. The seismogenic structure of the earthquake swarm can be divided into two parts. One is an NE-trending fault and more active in the early time of this earthquake swarm; the other is an NW-trending fault on which more earthquakes occurred in the later time. The seismicity is much stronger in the NW-trending fault than that in the NE-trending fault. According to focal mechanism of two lager earthquakes in the swarm, it is suggested that the mechanism of earthquakes occurred on the NW-trending fault are dominated by normal slip.
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    • References (29)
  • 全国7级地震与地震形势跟踪组. 2013. 中国大陆地震大形势跟踪与趋势预测研究报告[M]. 北京: 地震出版社: 86-88.

    Tracking Group of National M7 Earthquake and Earthquake Situation. 2013. The Tracking and Trend Forecasting Research Report of Earthquake Situation in China[M]. Beijing: Seismological Press: 86-88 (in Chinese).
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