Relocation of Earthquakes in the Northeastern Tianshan Mountains Area and Improvement of Local 1-D Crustal Velocity ModelI
  • 【DOI】

    10.3969/j.issn.0891-4176.2012.03.004

  • 【摘要】

    We apply three methods to relocate 599 earthquake events that occurred from August 2004 to August 2005 in the northeastern Tianshan Mountains area (85~30'- 88~30'E, 43~00'- 44~40'N) by using travel ti... 展开>>We apply three methods to relocate 599 earthquake events that occurred from August 2004 to August 2005 in the northeastern Tianshan Mountains area (85~30'- 88~30'E, 43~00'- 44~40'N) by using travel times recorded by regional seismic network and 10 portable seismic stations deployed around the Urumqi city. By comparing the reliability of different results, we determined a suitable location method, and an improved 1-D crustal velocity model of the study area. The uncertainty of earthquake location is significantly reduced with combined data of seismic network and portable stations. The relocated events are clearly associated with regional tectonics of the northeastern Tianshan Mountains area, and are also in agreement with the existence of active faults imaged by deep seismic reflection profile. The relocated seismicity discovers some potential traces of buried active faults, which need to be validated further. 收起<<

  • 【作者】

    Sun Anhui  Chen Qifu  Chen Yong  Li Gang  Zhang Zhiqiang 

  • 【作者单位】

    Institute of Geophysics/Institute of Earthquake'Science/China Earthquake Networks Center

  • 【刊期】

    中国地震研究(英文版) 2012年3期

  • 【关键词】

    地壳速度模型  地震发生  东北部  天山山区  区域地震台网  深地震反射剖面  区域地质构造  地震台站  Earthquake relocation  Velocity model  The northeastern Tianshan Mountains area  Active faults