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地震 ›› 2017, Vol. 37 ›› Issue (1): 73-81.

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邢台地区地壳各向异性特征初步研究

吴鹏1,李相平1,高原2,石玉涛2,刘立申3   

  1. 1.河北省地震局邯郸中心台, 河北 邯郸 056001;
    2.中国地震局地震预测研究所, 北京 100036;
    3.河北省地震局红山基准台, 河北 邢台 054000
  • 收稿日期:2015-12-07 发布日期:2019-08-14
  • 通讯作者: 李相平, 男, E-mail: wup67551@163.com
  • 作者简介:吴鹏(1982-), 男, 河北邯郸人, 工程师, 主要从事测震台网监测与仪器维护工作。
  • 基金资助:
    河北省地震局地震科技星火计划项目(DZ20150423074)与河北省重点地区壳幔结构及地震监测预报关键技术研究(13275407D)联合资助

Prelimitary Study of Crustal Anisotropy in the Xingtai Region, Hebei Province

WU Peng1,LI Xiang-ping1,GAO Yuan2,SHI Yu-tao2,LIU Li-shen3   

  1. 1.Central Station of Handan, Earthquake Administration of Hebei Province, Handan 056001, China;
    2. Institute of Earthquake Science, CEA, Beijing 100036, China;
    3. Earthquake Station of Hongshan, Earthquake Administration of Hebei Province, Xingtai 054000, China
  • Received:2015-12-07 Published:2019-08-14

摘要: 邢台地区处于华北平原地震带中南段, 是华北地区活跃的地震活动区。 本研究根据该地区的构造环境, 采用SAM方法研究地壳各向异性特征, 通过对邢台地区台站的数字波形进行分析, 初步得到邢台地区的剪切波分裂参数, 该地区的快剪切波平均偏振方向为73.9°±40.2°, 慢剪切波平均时间延迟为(2.74±1.54) ms/km。 结果表明, 快剪切波平均偏振方向与华北区域最大主压应力场方向基本一致, 但是受到局部断裂的制约, 部分台站下方的快剪切波的偏振方向显示为NWW方向。

关键词: 地壳各向异性, 剪切波分裂, 邢台地区

Abstract: Xingtai region is located in the south of north China plain belt, and the geological structure is complicated in this area. Based on the SAM method and data (2001-1—2014-12) from Hebei Seismic Network, the seismic anisotropy in Xingtai region is obtained. The average polarization of fast shear-wave is 73.9°±40.2°, and the average time delay of slow shear-wave is (2.74±1.54) ms/km. It is shown that the avaerge polarization of fast shear-wave is consistent with the regional maximum horizontal principal compressional stress. But because of the local faults, the polarization of fast shear-wave of some sites are NWW, more data is needed to explain the phenomenon.

Key words: Shear-wave splitting, Fast shear-wave splitting polarition, Slow shear-wave splitting, Xingtai region

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