基于DINSAR的2001年昆仑山口西8.1级大地震形变探测  

SEISMIC DEFORMATION DETECTION OF Ms 8.1 EARTHQUAKE IN WEST TO KUNLUN MOUNTAIN PASS IN 2001 WITH DINSAR

作　　者：张艳梅[1] 江在森[1] 李斐[2] 方颖[1] 

机构地区：[1]中国地震局地震预测研究所,北京100036 [2]武汉大学测绘学院,武汉430079

出　　处：《大地测量与地球动力学》2007年第3期12-17,共6页Journal of Geodesy and Geodynamics

基　　金：科技部社会公益重点项目"2006-2020年中国地震危险区与地震灾害损失预测研究"子课题"大地形变在未来十五年地震预测中的应用研究"(2004DIA3J010);山东省"基础地理信息与数字化技术"重点开放实验室基金(SD040210)

摘　　要：2001年11月14日发生的昆仑山口西8.1级大地震造成了长度近400km的破裂带,以断裂带最西端的震中地区为实验区,选取多时相ERS-2SAR影像和航天飞机SRTMDEM数据,采用两路和三路雷达差分干涉处理方法分别提取了地震形变信息。结果表明:在地形起伏大的高山地区,采用外部DEM的两路差分方法可以取得更好的结果;昆仑山地震造成的太阳湖南侧断裂带为左旋走滑。The Ms8.1 earthquake occured in the west to Kunlun mountain pass in 2001 created a fault of about 400 km. The epicenter region which is the most west part of the fault is selected as studied area. Using the Multitemporal European ERS-2 SAR imagery and shuttle-based SRTM DEM data, the surficial displacements are estimated with two-pass and three-pass DINSAR methods respectively. The comparison between the two results shows that over fluctuating mountains two-pass DINSAR with external DEM might obtain better results than three-pass DINSAR method and the fault along the south side of Taiyang lake formed from the Ms8.1 earthquake is left-lateral.

关 键 词：雷达差分干涉测量 三路差分 两路差分 地壳形变 昆仑山8.1级地震 

分 类 号：P315.725[天文地球—地震学]