基于差分干涉雷达的汶川地震同震形变特点

姚鑫; 张永双

基于差分干涉雷达的汶川地震同震形变特点

姚鑫^{1, 2,},
张永双^{1, 2}

1.
国土资源部新构造运动与地质灾害重点实验室
2.
中国地质科学院地质力学研究所, 北京 100081

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
计量
- 文章访问数: 158
- HTML全文浏览量: 85
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2009-05-27
- 刊出日期: 2009-06-28

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

YAO Xin^{1, 2
,},
ZHANG Yong-shuang^{1, 2}

1.
Key Lab of Neotectonic and Geohazard MLR, Beijing 100081, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

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。
- 汶川地震 /
- 同震形变场 /
- 干涉雷达 /
- D-InSAR /
- 断层活动性
Abstract: Co-seismic deformation is important original information to determine seismogenic faults, to understand mechanism of earthquake, to analyze fault movement, to evaluate the earthquake property lo sses as well as to discover the trend of future earthquakes. However, ways to survey co-seismic deformation are unable to quickly and comprehensively capture this kind of information. Therefore, a new spatial surveying method, D-InSAR (i. e. Differential Interferometry SAR), is highlighted. This paper presents D-InSAR principle and reviews progress of D-InSAR applied to co-seismic deformation observation, then qualitatively analyzes characteristics of D-InSAR image about " 5.12" Wenchuan earthquake. Results show that many geological phenomena, surface ruptures, change of fault dip angle, vertical displacement of two plates alone fault and distribution of huge geo-hazards, are highly related with D-InSAR image.
- Wenchuan earthquake /
- co-seismic deformation /
- D-InSAR /
- fault activity /

HTML全文

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

下载: 全尺寸图片幻灯片

图 2 干涉雷达测量原理示意图

Figure 2. Sketch map of D-InSAR principle

下载: 全尺寸图片幻灯片

图 3 4种雷达数据的干涉条纹

Figure 3. D-InSAR images of 4 sensors

下载: 全尺寸图片幻灯片

图 4 差分干涉雷达处理流程图^[15]

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

下载: 全尺寸图片幻灯片

图 5 龙门山构造带差分干涉图像

Figure 5. D-InSAR image in Longmenshan area

下载: 全尺寸图片幻灯片

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