The coseismic displacement field of the Zhangbei-Shangyi earthquake mapped by differ- ential radar interferometry

摘要

The coseismic deformation produced by 1998 earthquake (M_s = 6.2) in Zhangbei-Shangyi of northern China is measured by the differential synthetic aperture ra- Dar interferometry (D-InSAR) technique using the European Remote Sensing satellite (ERS) SAR data. Interferograms Are constructed from the ERS-1/2 SAR data by the Three-pass method. The line-of-sight displacement map indi- Cates that the deformation center of the earthquake is lo- Cated at E114 20', N40 57', with the maximum uplift of 25 cm. The extent of the displacement is around 300 km~2.