| 利用噪声记录估计福建地区中上地壳体波速度结构 |
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| 引用本文： | 李军,金星,鲍挺,林树,韦永祥,张红才.利用噪声记录估计福建地区中上地壳体波速度结构[J].中国地震研究,2012,26(3):310-320. |
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| 作者姓名： | 李军 金星 鲍挺 林树 韦永祥 张红才 |
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| 作者单位： | 1）福建省地震局，福州市华鸿路7号 350003;1）福建省地震局，福州市华鸿路7号 350003/2）中国地震局工程力学研究所，哈尔滨市学府路29号 150080/3）福州大学，福建 福州市工业路523号 350002;1）福建省地震局，福州市华鸿路7号 350003;1）福建省地震局，福州市华鸿路7号 350003;1）福建省地震局，福州市华鸿路7号 350003;1）福建省地震局，福州市华鸿路7号 350003 |
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| 基金项目： | This research was supported by Special R＆D Fund of Seismological Industry (200808067) and Spark Program of Earthquake Science (XH1016Y)，China． |
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| 摘 要： | In this paper,the dispersion curves of the Rayleigh wave and Love wave were extracted from the seismic noise records of 25 broadband stations of the Fujian Seismic Network, and inverted for the lithosphere velocity structure. Furthermore,the velocity model was verified by the seismic explosion observations. Our results indicate that the resolution of the lithosphere velocity structure obtained by this method is good in the shallow part,but in the deep part,inversion accuracy for the wave velocity structure is low,which is caused mainly by the small inter-station distance chosen in the paper. Thus the wave dispersion curves have high accuracy in the short-period part,but the warp of the wave dispersion curve in long-period part is large. Considering the results from both the noise inversion and the traditional inversion,we finally present a new velocity model,and the theoretical travel time calculated with the new model matches the explosion travel time very well.
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| 关 键 词： | Noise Green’s function Dispersion curve Velocity structure |
The Body Wave Velocity Structure in the Upper Crust of Fujian Estimated by Noise Records |
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| Li Jun,Jin Xing,Bao Ting,Lin Shu,Wei Yongxiang and Zhang Hongcai.The Body Wave Velocity Structure in the Upper Crust of Fujian Estimated by Noise Records[J].Earthquake Research in China,2012,26(3):310-320. |
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| Authors: | Li Jun Jin Xing Bao Ting Lin Shu Wei Yongxiang and Zhang Hongcai |
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| Institution: | 1) Earthquake Administration of Fujian Province, Fuzhou 350003, China;1) Earthquake Administration of Fujian Province, Fuzhou 350003, China , 2) Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China , 3) Fuzhou University, Fuzhou 350002, China;1) Earthquake Administration of Fujian Province, Fuzhou 350003, China;1) Earthquake Administration of Fujian Province, Fuzhou 350003, China;1) Earthquake Administration of Fujian Province, Fuzhou 350003, China;1) Earthquake Administration of Fujian Province, Fuzhou 350003, China |
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| Abstract: | In this paper, the dispersion curves of the Rayleigh wave and Love wave were extracted from the seismic noise records of 25 broadband stations of the Fujian Seismic Network, and inverted for the lithosphere velocity structure. Furthermore, the velocity model was verified by the seismic explosion observations. Our results indicate that the resolution of the lithosphere velocity structure obtained by this method is good in the shallow part, but in the deep part, inversion accuracy for the wave velocity structure is low, which is caused mainly by the small inter-station distance chosen in the paper. Thus the wave dispersion curves have high accuracy in the short-period part, but the warp of the wave dispersion curve in long-period part is large. Considering the results from both the noise inversion and the traditional inversion, we finally present a new velocity model, and the theoretical travel time calculated with the new model matches the explosion travel time very well. |
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| Keywords: | Noise Green’s function Dispersion curve Velocity structure |
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