InSAR技术在西藏玛尼强震区的应用

英文篇名：Application of InSAR technology the strong earthquake in Mani, Tibet
中文刊名：清华大学学报(自然科学版)
英文刊名：Journal of Tsinghua University(Science and Technology)
作者：张景发 ; 刘钊
英文作者：ZHANG Jingfa 1 ; LIU Zhao 2(1. Institute of Crustal Dynamics ; Chinese Seismological Bureau ; Beijing 100085 ; China ; 2. Institute Geo-Spatial Infomation ; Tsinghua University ; Beijing 100084 ; China)
中文关键词：合成孔径雷达干涉测量(InSAR) ; 玛尼地震 ; 干涉图像 ; 地壳形变 ; 同震形变
英文关键词：InSAR (interferometric synthetic aperture rader) ; Mani earthquake ; interferometric image ; crustal deformation ; coseismic displacement
出版日期：2002-06-30
机构：中国地震局地壳应力研究所,清华大学地球空间信息研究所北京100085 ,北京100084
年：2002
期：06
出版单位：清华大学学报(自然科学版)

摘要

为测量 1997年 11月 9日西藏玛尼里氏 7.4级地震震前一年的地壳形变和震时同震形变 ,以地震震中为图像中心的 5 0 km× 5 0 km范围内 ,选择了 5景 ERS- 1/ 2数据组成5个像对 ,并在此基础上组成 2个差分像对 ,以分别表示地震前一年形变和同震形变 ,再应用合成孔径雷达干涉测量(In SAR)技术进行处理。在同震形变差分图上 ,地震断层作用清晰可辨 ,在卫星斜距方向上可测量出近 0 .5 m的形变。结果表明 :In SAR技术对于定量研究同震形变和地震断层具有特别的优势和广阔的应用前景
The crustal deformation and the coseismic displacement were measured during the 7.4 magnitude earthquake in Mani, Tibet on November 9, 1997 using InSAR technology. Five image pairs composed of five sets of ERS-1/2 data were selected in an area of 50 km×50 km around the earthquake center to form two differential InSAR (Interferometric Synthetic Aperture Rader) image pairs showing the crustal deformation one year before the earthquake and the coseismic displacement. The InSAR technology was used to process the image data. The differential InSAR map of the coseismic displacement clearly showed the effects of the earthquake faults. In the diagonal direction, deformations up to 0.5 m are detected, which shows the advantage of the InSAR technology for quantitative study of coseismic displacements and quake faults.

引文

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