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Chen Xiangkai, Zeng Weishun, Ding Youxing, Zhang Huamei, Chen Xiangjun, Sun Dongjun. 2018: Identification of Pb seismic phase and Conrad’s discontinuity in Hainan area. Acta Seismologica Sinica, 40(4): 411-418. DOI: 10.11939/jass.20170178
Citation: Chen Xiangkai, Zeng Weishun, Ding Youxing, Zhang Huamei, Chen Xiangjun, Sun Dongjun. 2018: Identification of Pb seismic phase and Conrad’s discontinuity in Hainan area. Acta Seismologica Sinica, 40(4): 411-418. DOI: 10.11939/jass.20170178
shu

Identification of Pb seismic phase and Conrad’s discontinuity in Hainan area

  • 1.

    Hainan Earthquake Agency，Haikou 570203，China

  • 2.

    Earthquake Agency of Xinjiang Uygur Autonomous Region，Ürümqi 830011，China

  • 3.

    Shanghai Earthquake Agency，Shanghai 200062，China

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  • Received Date: July 19, 2017
  • Revised Date: December 29, 2017
  • Available Online: July 25, 2018
  • Published Date: June 30, 2018
    Graphical Abstract
    • Abstract
  • This paper selected 281 earthquakes with ML≥2.0 from 1 January 2009 to 25 August 2016 recorded by Hainnan seismic networks, and relocated the focal depths of the earthquakes by using PTD method. And then the Pb phase in Hainan area were analyzed by using the reduced travel time and the Pb phase velocity fitting are corroborated. As a result, the Pb phases are identified in Hainan island. The results show that, 57 Pb phases were identified from 52 of the 281 seismic events with phase velocities 6.68 km/s. Based on inversion of seismic wave travel time equation, the average depth of Conrad’s discontinuity in Hainan area is determined to be 21 km.
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