摘要
2010-04-14青海玉树发生7.1级地震后,作者利用震前和震后获取的日本ALOS卫星PALSAR遥感数据,开展了差分干涉雷达(D-InSAR)地震同震形变测量与分析。结果表明:玉树地震引起较大范围地表变形,地震变形沿玉树—甘孜断裂带向南东东方向扩展,在N33.7°,E96.81°附近达到最大形变量,D-InSAR监测到雷达视向上的最大形变量为35cm。地表形变特征对于评价玉树地震破坏程度、推断断层性质、研究地震形变和地震孕育特征具有重要的参考价值。
An earthquake of magnitude 7.1 suddenly occurred in Yushu county of Qinghai province on April 14, 2010. This paper presents the studies of using the data of Advanced Land Observing Satellite-Phased Array type L-band Synthetic Aperture Radar （ALOS-PALSAR） before and after the earthquake to examine and calculate the co-seismic ground deformation. The dif-ferential SAR interferometry （D-InSAR） technique is used. The results show that the earthquake caused the ground deformation over a large area. The extension of the ground deformation followed the south-east to east direction and along the Yushu-Ganzi fault zone. The largest deformation was found about 350 mm at 33.7°N 96.81°E. It is along the line of sight （LOS） of SAR and can be detected with D-InSAR technique. The detected ground deformation was mainly uplifting. The detected ground deforma-tion has an important value for evaluating the extent of ground damage and seismicity in Yushu after earthquake, inferring the nature of the quake faulting, and studying characteristics of seismic deformation.
出处
《遥感学报》
EI
CSCD
北大核心
2010年第5期1029-1037,共9页
NATIONAL REMOTE SENSING BULLETIN
基金
国家科技支撑计划(编号:2008BAK49B02
2008BAC34B02-1C)
中国科学院知识创新工程重要方向项目(编号:KZCX1-YW-08-02
KZCX2-YW-Q10-2-2-1)~~
关键词
玉树地震
差分干涉
同震形变
Yushu Earthquake
D-InSAR
co-seismic ground deformation
lake ice fracturing
