| Three—dimensional P velocity structure in Beijing area |
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| 引用本文： | 于湘伟,陈运泰,王培德.Three—dimensional P velocity structure in Beijing area[J].地震学报(英文版),2003,16(1):1-15. |
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| 作者姓名： | 于湘伟 陈运泰 王培德 |
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| 作者单位： | InstituteofGeophysics,ChinaSeismologicalBureau,Beijing100081,China |
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| 基金项目： | Climbing Project Continental Dynamics of East Asia (95-S-05) from Ministry of Science and Technology, P. R. China. |
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| 摘 要： | A detail three-dimensional P wave velocity structure of Beijing,Tianjin and Tangshan area(BTT area)was deter-mined by inverting local earthquake data.In total 16 048 Pwave first arrival times from 16048 shallow and mid-depth crustal earthquakes,which occurred in and around the BTT area from 1992to 1999were used.The first arrival times are recorded by Northern China Unived Telemetry Seismic Network and Yanqing-Huailai Digital Seismic Network.Hypocentral parameters of 1 132 earthquakes with magnitude ML=1.7-6.2 and the three-dimensional P wave velocity structure were obtained simultaneously.The inversion result reveals the com-plicated lateral heterogeneity of P wave velocity structure around BTT area.The tomographic images obtained are also found to explain other seismological observations well.
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| 关 键 词： | 京津唐地区 地震波 P波速度结构 数字遥测地震台网 地震观测 地震活动性 |
| 收稿时间： | 25 March 2002 |
| 修稿时间： | 9 October 2002 |
Three-dimensional P velocity structure in Beijing area |
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| Yu Xiang-wei , Chen Yun-tai and Wang Pei-de.Three-dimensional P velocity structure in Beijing area[J].Acta Seismologica Sinica(English Edition),2003,16(1):1-15. |
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| Authors: | Yu Xiang-wei Chen Yun-tai and Wang Pei-de |
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| Institution: | Institute of Geophysics, China Seismological Bureau, Beijing 100081, China |
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| Abstract: | A detail three-dimensional P wave velocity structure of Beijing, Tianjin and Tangshan area (BTT area) was deter-mined by inverting local earthquake data. In total 16 048 P wave first arrival times from 16048 shallow and mid-depth crustal earthquakes, which occurred in and around the BTT area from 1992 to 1999 were used. The first arrival times are recorded by Northern China United Telemetry Seismic Network and Yanqing-Huailai Digital Seismic Network. Hypocentral parameters of 1 132 earthquakes with magnitude ML=1.7~6.2 and the three-dimensional P wave velocity structure were obtained simultaneously. The inversion result reveals the com-plicated lateral heterogeneity of P wave velocity structure around BTT area. The tomographic images obtained are also found to explain other seismological observations well. |
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| Keywords: | tomography three-dimensional velocity structure seismic activity high velocity anomalies low velocity anomalies lateral heterogeneity |
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