Abstract:

The 2017 Iran-Iraq earthquake is the largest earthquake in zagros mountains since 1900. In order to study the coseismic deformation field caused by the earthquake, two-pass differential DInSAR processing is carried out using three pairs of Sentinel-1A elevation track data covering the same area, and the three-dimensional coseismic deformation field of the study area is reconstructed by direct solution algorithm. The experiment shows that the elevation track line of sight of the three perspectives is basically consistent with the settlement trend. The reconstruction of 3D deformation field can be realized by combining the observation results from multiple perspectives. According to the characteristics of surface line of sight and three-dimensional coseismic deformation and geological structure background, it is speculated that the seismogenic fault is likely to be Zagros piedmont fault.

Key words: Mw 7.3 Iran-Iraq earthquake, DInSAR, three-dimensional coseismic deformation, Sentinel-1A, Zagros piedmont fault