| 中国地震台网初至P波区域三维走时表的建立 |
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| 引用本文： | 梁建宏,韩雪君,孙丽,梁姗姗,张雪梅.中国地震台网初至P波区域三维走时表的建立[J].地震学报,2015,37(1):125-133. |
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| 作者姓名： | 梁建宏 韩雪君 孙丽 梁姗姗 张雪梅 |
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| 作者单位： | (中国北京100045中国地震台网中心) |
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| 基金项目： | 国家自然科学基金项目，测震台网青年骨干培养专项 |
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| 摘 要： | 基于LLNL-G3Dv3全球P波三维速度模型，应用FMM软件包计算并建立了中国地震台网990个台站的初至P波区域三维走时表．该走时表覆盖了以台站为中心的水平向20°×20°、 垂直向-5.1—80 km （向下为正）的三维空间. 其水平向间隔为0.2°，垂直向间隔为5 km．这样对于任一深度小于80 km的震源，均可以应用此三维走时表计算其到周围10°范围内台站的走时．中国地震台网初至P波区域三维走时表的建立，对于改善区域初至P波走时预测，提高地震定位精度有一定现实意义．
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| 关 键 词： | style="font-size:14px 中国地震台网" target="_blank">font-family:宋体">中国地震台网 style="font-size:14px font-family:'Times New PRoman'">P style="font-size:14px 波" target="_blank">font-family:宋体">波 三维速度模型 走时表 建立 |
Construction of regional three-dimensional travel-time tables of first P arrival for China Seismograph Network |
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| Liang Jianhong,Han Xuejun,Sun Li,Liang Shanshan,Zhang Xuemei.Construction of regional three-dimensional travel-time tables of first P arrival for China Seismograph Network[J].Acta Seismologica Sinica,2015,37(1):125-133. |
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| Authors: | Liang Jianhong Han Xuejun Sun Li Liang Shanshan Zhang Xuemei |
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| Institution: | (China Earthquake Networks Center，Beijing 100045，China) |
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| Abstract: | Based on the global-scale three-dimensional P wave velocity model LLNL-G3Dv3，regional travel-time table of first P arrivals of 990 seismic stations of China Seismograph Network is calculated and constructed by using FMM software package. The table covers the station-centered area with 20° multiply 20° in horizontal direction and -5.1 km to 80 km in vertical direction. The horizontal interval of travel-time table is 0.2° and the depth interval is 5 km. Accordingly，travel-times can be calculated within the distance of 10° for any source with depth less than 80 km. As a consequence of the construction of the regional three-dimensional first P arrival travel-time table，the prediction of first P arrival time would be much more improved，and it is significant for improving earthquake locations. |
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| Keywords: | China Seismograph Network P wave three-dimensional velocity model travel-time table construction |
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