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Deformation of Bhuj Earthquake Area Obtained with Persistent Scatterer Interferometric Analysis of Alos L-Band Sar Data

Long-term ground surface displacements of seismically active Bhuj area in India between two time spans are derived from L-band ALOS-1 and ALOS-2 images using Persistent Scatterer Interferometry approach. The work also focuses on studying the influence of high resolution TanDEM-X Global DEM on topographic phase removal and it's effect on deformation estimates. The results over the 2001 Bhuj earthquake epicentral region indicate minor deformation rates in the range of ±20 mm year−1. Interpretation of results revealed new subsidence areas between 2014 and 2017.