Coseismic deformation and model prediction of strike-variable fault model with rectangle patches. (a) ascending and (d) descending ALOS-2 data. (b) and (e) are predicted InSAR data from the optimal strike-variable fault model. (c) and (f) are residuals. (g–i) LOS displacements along the three profiles (AA’, BB’ and CC’) shown in (a) and (d). The black rectangle denotes the fault projection on the surface. The dashed black line denotes the projection of the fault trace. Orange dots denote the aftershocks from USGS. The red beach ball denotes the focal mechanism of the 2015 Alor earthquake from GCMT. The red and yellow stars represent the location of the main shock from GCMT and USGS, respectively.