| 海南地区Pb震相的识别及康拉德面的确定 |
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| 引用本文： | 陈祥开,曾维顺,丁有兴,张华美,陈向军,孙冬军.海南地区Pb震相的识别及康拉德面的确定[J].地震学报,2018,40(4):411-418. |
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| 作者姓名： | 陈祥开 曾维顺 丁有兴 张华美 陈向军 孙冬军 |
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| 作者单位： | 1.中国海口 570203 海南省地震局 |
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| 基金项目： | 海南省地震局科技项目（HDKJ201604）资助 |
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| 摘 要： | 选取海南省地震台网2009年1月1日至2016年8月25日记录到的281次ML≥2.0地震，利用PTD方法重新定位其震源深度，采用折合走时分析海南Pb震相，并对Pb震相的速度拟合进行佐证，进而确定海南岛Pb震相的存在。结果显示，从其中的52次地震事件中可识别出57个Pb震相，其相速度为6.68 km/s，在此基础上以地震波走时方程反演得到的海南地区康拉德面的平均深度为21 km。
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| 关 键 词： | Pb震相 海南地壳 康拉德面 折合走时 PTD定位方法 |
| 收稿时间： | 2017-07-20 |
Identification of Pb seismic phase and Conrad’s discontinuity in Hainan area |
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| Institution: | 1.Hainan Earthquake Agency，Haikou 570203，China2.Earthquake Agency of Xinjiang Uygur Autonomous Region，ürümqi 830011，China3.Shanghai Earthquake Agency，Shanghai 200062，China |
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| 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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