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Sun Nan, Gao Yuan, Zhao Xiaoyan, Su Youjin, Liu Geng, Wu Chengdong. 2017: Near-field shear-wave splitting of 2014 Yingjiang MS6.1 earthquake sequence. Acta Seismologica Sinica, 39(1): 34-46. DOI: 10.11939/jass.2017.01.004
Citation: Sun Nan, Gao Yuan, Zhao Xiaoyan, Su Youjin, Liu Geng, Wu Chengdong. 2017: Near-field shear-wave splitting of 2014 Yingjiang MS6.1 earthquake sequence. Acta Seismologica Sinica, 39(1): 34-46. DOI: 10.11939/jass.2017.01.004
shu

Near-field shear-wave splitting of 2014 Yingjiang MS6.1 earthquake sequence

  • 1).

    School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China

  • 2).

    Earthquake Administration of Yunnan Province, Kunming 650224, China

  • 3).

    Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China

More Information
  • Received Date: May 09, 2016
  • Revised Date: September 11, 2016
  • Published Date: December 31, 2016
    Graphical Abstract
    • Abstract
  • SAM (systematic analysis method of shear-wave splitting) has been applied to numerous waveform data recorded by near-field mobile seismic stations of Yingjiang MS6.1 earthquake sequence occurred on May 30， 2014. The results showed that the polarization of fast shear-wave of the earthquake sequence was consistent with regional principal compressive stress of NS trending. The polarization of fast shear-wave has a counterclockwise deflection at the station KAC， and dispersion decrease at the station MNO due to the adjustment of stress state in seismic region after the main shock. Influenced by faults of the studied area， the polarization of fast shear-wave at the station MNO presents a more discrete state compared to that of KAC. The time-delays of slow shear-wave at the stations KAC and MNO both present the feature of sudden contraction before the main shock and increase after the event， which means release and enhancement of crustal stress before and after the earthquake， and also indicates constant occurrence of aftershocks. The oscillation of time-delay curves suggests that the occurrence of aftershocks is accompanied by continuous adjustment of crustal stress in seismic region.
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    • References (59)
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