Studying Interseismic Deformation Using InSAR Phase-gradient Stacking: Application to the North Anatolian Fault

• DOI: 10.1002/essoar.10509450.1
• Publication Date: 2021-12-14T16:23:35Z
• Authors: Ziming Liu; Teng Wang

The geodetic measurements of accumulated strains along active faults during their interseismic periods have a strong connection with faulting dynamics and seismic hazards evaluation. InSAR has been widely applied to study the deformation strike-slip around world. However, various limitations such as that from phase unwrapping errors tropospheric delays are often encountered, hindering our interpretation model inversion. Phase-gradient stacking is method sums up wrapped differences adjacent pixels in multi-interferograms. It successfully conducted reveal local signals across coseismic fractures, yet lacks application relatively larger-scale signals. Here we apply phase-gradient method, for first time, North Anatolian Fault Sentinel-1 SAR images acquired 2014 2021. We obtain strain rate field fault without need hundreds large interferograms. Segments surface creep coupling effects can be clearly distinguished gradient maps, allowing us directly invert long-term slip rates locking depths. Our preliminary, but promising results show advantages studying by connecting parameters.