| Research on anisotropic parameters by syn-thetic seismogram |
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| 作者姓名： | 范小平 李清河 杨从杰 |
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| 作者单位： | Earthquake Administration of Jiangsu Province，Nanjing210014，China，Lanzhou Institute of Seismology，China Earthquake Administration，Lanzhou730000，China，Earthquake Administration of Jiangsu Province，Nanjing210014，China，Lanzhou Institute of Seismology，China Earthquake Administration，Lanzhou730000，China，Earthquake Administration of Jiangsu Province，Nanjing210014，China |
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| 基金项目： | National Natural Science Foundation of China (D4007410) and Joint Seismological Science Foundation of China (603006). |
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| 摘 要： | Introduction The anisotropy of the Earth crust medium is a common phenomenon(Crampin,1984).More and more observation materials and study results have proved that on most of the Earth′s upper crust is spread fluid-filled cracks and microcracks,which are aligned according to the contempo-rary stress-field.Such distributions of aligned cracks show effectively anisotropy to seismic wave and the phenomenon is called extensive-dilatancy anisotropy(EDA)(Crampin et al,1984).At the same time,it is …
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| 收稿时间： | 20 August 2003 |
| 修稿时间： | 8 October 2004 |
Research on anisotropic parameters by synthetic seismogram |
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| FAN Xiao-ping,LI Qing-he,YANG Cong-jie.Research on anisotropic parameters by syn-thetic seismogram[J].Acta Seismologica Sinica(English Edition),2005,18(2):196-205. |
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| Authors: | FAN Xiao-ping LI Qing-he YANG Cong-jie |
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| Institution: | 1. Earthquake Administration of Jiangsu Province, Nanjing 210014, China;Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China
2. Earthquake Administration of Jiangsu Province, Nanjing 210014, China |
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| Abstract: | Based on the extensive-dilatancy anisotropy theory, the method of synthetic seismogram is used to estimate the anisotropic parameters. The advantages of the method lie in that it avoids the singularity resolution and saves cal- culation time of computer by using the eigenvalue and eigenvector analytical expressions of Christoffel equation, at the same time, the result is tested by coherence function. The test result reveals there exists a fine linear relation between original records and synthetic records, indicating the anisotropic parameters estimated by synthetic seis- mogram can reflect and describe the anisotropic characteristics of the given region medium. |
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| Keywords: | anisotropy synthetic seismogram anisotropy parameter |
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