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基于差分干涉雷达的汶川地震同震形变特点

姚鑫 张永双

姚鑫, 张永双, 2009. 基于差分干涉雷达的汶川地震同震形变特点. 地质力学学报, 15 (2): 151-161.
引用本文: 姚鑫, 张永双, 2009. 基于差分干涉雷达的汶川地震同震形变特点. 地质力学学报, 15 (2): 151-161.
YAO Xin, ZHANG Yong-shuang, 2009. CO-SEISMIC DEFORMATION OF '5.12' WENCHUAN EARTHQUAKE BASED ON D-INSAR. Journal of Geomechanics, 15 (2): 151-161.
Citation: YAO Xin, ZHANG Yong-shuang, 2009. CO-SEISMIC DEFORMATION OF "5.12" WENCHUAN EARTHQUAKE BASED ON D-INSAR. Journal of Geomechanics, 15 (2): 151-161.

基于差分干涉雷达的汶川地震同震形变特点

基金项目: 

中国地质科学院地质力学研究所基本科研业务费项目 DZLXJK200906

中国地质科学院地质力学研究所基本科研业务费项目 DZLXJK200708

中国地质调查局工作项目 1212010914025

详细信息
    作者简介:

    姚鑫(1978-), 男, 博士, 地质工程专业。E-mail:yaoxingphd@163.com

  • 中图分类号: P315.2

CO-SEISMIC DEFORMATION OF "5.12" WENCHUAN EARTHQUAKE BASED ON D-INSAR

  • 摘要: 地震同震形变场是认识震源机制、确定发震断裂、分析发震断裂活动方式、评估震害损失及揭示未来发震趋势的重要依据。但在龙门山地区复杂的自然环境中, 现有的地震同震形变场获取方法(GPS测量、构造形迹分析、震源机制解结合数值模拟计算)难以快速、全面的捕捉到这种信息, 这突显出差分干涉雷达技术(D-InSAR, Differential Interferometry SAR)在同震形变场研究中的优势。本文介绍了其观测原理, 在地震同震形变监测中的研究现状, 并重点分析了已获取的D-InSAR汶川地震同震形变场的观测结果。基于差分干涉雷达观测及相关资料, 对龙门山断裂在本次地震中活动性进行了初步分析, 结果表明干涉雷达形变图像与地表破裂范围、逆冲角度的变化、上下盘升降关系及大型余震的展布存在很强的相关性。

     

  • 图  1  汶川地震余震、地表破裂及断裂图

    Figure  1.  Map showing aftershocks, surface ruptures and faults

    图  2  干涉雷达测量原理示意图

    Figure  2.  Sketch map of D-InSAR principle

    图  3  4种雷达数据的干涉条纹

    Figure  3.  D-InSAR images of 4 sensors

    图  4  差分干涉雷达处理流程图[15]

    Figure  4.  Flowchart for the D-InSAR processing[15]

    图  5  龙门山构造带差分干涉图像

    Figure  5.  D-InSAR image in Longmenshan area

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  • 收稿日期:  2009-05-27
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