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用合成孔径雷达差分干涉测量技术获取1998年1月10日张北-尚义地震(Ms = 6.2级)的同震形变图, 利用地震前后欧洲遥感卫星1和2号合成孔径雷达(ERS-1/2 SAR)的三景数据做重复轨道差分处理得到震前震后的干涉纹图. 由视向形变图可知, 此次地震造成隆起形变, 形变中心位于114°20′E, 40°57′N, 最大视向位移量达25 cm, 形变集中在300 km2范围内, 根据地震同震形变场的空间分布特征分析了震源机理和孕震构造.
The co-seismic deformation diagram of the Zhangbei-Shangyi earthquake (Ms = 6.2) on January 10, 1998 was obtained by using the differential interference measurement technique of synthetic aperture radar. By using the synthetic aperture radar (ERS-1) of European remote sensing satellites 1 and 2 before and after the earthquake / 2 SAR) to obtain the interference fringe pattern after the pre-earthquake epicenters, we can see that the epicenter caused the uplift deformation and the deformation center was located at 114 ° 20’E and 40 ° 57’N, The maximum apparent displacement is 25 cm and the deformation is concentrated in the range of 300 km2. According to the spatial distribution of the coseismic deformation field, the focal mechanism and seismogenic structure are analyzed.