| 天山东北部地震的重新定位和一维地壳速度模型的改善 |
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| 引用本文： | 孙安辉,陈棋福,陈颙?,李纲,张智强.天山东北部地震的重新定位和一维地壳速度模型的改善[J].中国地震研究,2012,26(3):321-334. |
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| 作者姓名： | 孙安辉 陈棋福 陈颙? 李纲 张智强 |
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| 作者单位： | 1）中国地震局地球物理研究所，北京市海淀区民族大学南路5号 100081/2）中国地震局地震预测研究所，北京市海淀区复兴路63号 100036;2）中国地震局地震预测研究所，北京市海淀区复兴路63号 100036;2）中国地震局地震预测研究所，北京市海淀区复兴路63号 100036;3）中国地震台网中心，北京市西城区三里河南横街5号 100045;2）中国地震局地震预测研究所，北京市海淀区复兴路63号 100036 |
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| 基金项目： | This project was supported by the Basic Research Project of Institute of Earthquake Science，CEA (2012IES010103) and the National Natural Science Foundation of China (41204037)． |
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| 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 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.
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| 关 键 词： | Earthquake relocation Velocity model The northeastern Tianshan Mountains area Active faults |
Relocation of Earthquakes in the Northeastern Tianshan Mountains Area and Improvement of Local 1-Dimensional Crustal Velocity Model |
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| Sun Anhui,Chen Qifu,Chen Yong,Li Gang,and Zhang Zhiqiang?.Relocation of Earthquakes in the Northeastern Tianshan Mountains Area and Improvement of Local 1-Dimensional Crustal Velocity Model[J].Earthquake Research in China,2012,26(3):321-334. |
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| Authors: | Sun Anhui Chen Qifu Chen Yong Li Gang and Zhang Zhiqiang? |
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| Institution: | 1) Institute of Geophysics, China Earthquake Administration, Beijing 100081, China , 2) Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China;2) Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China;2) Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China;3) China Earthquake Networks Center, Beijing 100045, China;2) Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China |
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| Abstract: | 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. |
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| Keywords: | Earthquake relocation Velocity model The northeastern Tianshan Mountains area Active faults |
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