| 三维复杂速度结构中深发地震的双差分定位 |
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| 引用本文： | 江国明,赵大鹏,张贵宾. 三维复杂速度结构中深发地震的双差分定位[J]. 地球科学, 2009, 34(6): 1001-1011 |
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| 作者姓名： | 江国明 赵大鹏 张贵宾 |
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| 作者单位： | 中国地质大学地下信息探测技术与仪器教育部重点实验室,北京,100083;中国地质大学地球物理与信息技术学院,北京,100083 |
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| 基金项目： | 地下信息探测技术与仪器教育部重点实验室开放课题项目(No.GDL0806); “863”计划重大项目(Nos.2006AA06A202,2006AA06A203) |
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| 摘 要： | 双差分地震定位法采用了一维射线追踪法和直角坐标系, 不适合于复杂速度模型中的地震定位.本研究采用三维射线追踪技术和球坐标系改进了双差分定位法, 扩大了它的应用范围.为了检验新方法的可行性和准确性, 以日本海地区下方的深发地震为研究对象, 通过对比4种复杂速度模型中双差分定位结果, 分析速度结构对双差分定位的影响.结果表明, 改进后的双差分定位法受速度结构变化的影响较小, 而且当震源区的速度模型越接近真实速度结构时, 定位结果的精度越高, 这为利用深发地震研究地球深部构造奠定了基础.
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| 关 键 词： | 地震 双差分定位 三维速度模型 日本海. |
| 收稿时间： | 2009-06-10 |
Locating Deep Earthquakes in Complex 3-D Velocity Structure Using a Modified Double-Difference Location Method |
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| JIANG Guo-ming,ZHAO Da-peng,ZHANG Gui-bin.Key Laboratory of Geo-Detection of Ministry of Education,China University of Geosciences,Beijing,China.School of Geophysics , Information Technology,China. Locating Deep Earthquakes in Complex 3-D Velocity Structure Using a Modified Double-Difference Location Method[J]. Earth Science-Journal of China University of Geosciences, 2009, 34(6): 1001-1011 |
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| Authors: | JIANG Guo-ming ZHAO Da-peng ZHANG Gui-bin.Key Laboratory of Geo-Detection of Ministry of Education China University of Geosciences Beijing China.School of Geophysics Information Technology China |
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| Affiliation: | JIANG Guo-ming1,2,ZHAO Da-peng3,ZHANG Gui-bin21.Key Laboratory of Geo-Detection of Ministry of Education,China University of Geosciences,Beijing100083,China2.School of Geophysics and Information Technology,China3.Department of Geophysics,Tohoku University,Sendai980-8578,Japan |
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| Abstract: | The double-difference (DD) earthquake location algorithm cannot be used to locate earthquakes in the complex 3-D velocity models because it adopts a 1-D ray tracing technique and the Cartesian coordinates. In this study,we have improved the DD location method by adopting a 3-D ray tracing method and the spherical coordinates,and thus extended the range of its applications. To testify the feasibility and the precision of this new method,we have relocated the deep earthquakes that occurred beneath the Japan S... |
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| Keywords: | earthquakes double-difference location 3-D velocity model Japan Sea. |
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