High‐resolution surface velocities and strain for Anatolia from Sentinel‐1 InSAR and GNSS data

Measurements of present‐day surface deformation are essential for the assessment of long‐term seismic hazard. The European Space Agency's Sentinel‐1 satellites enable global, high‐resolution observation of crustal motion from Interferometric Synthetic Aperture Radar (InSAR). We have developed automated InSAR processing systems that exploit the first ~5 years of Sentinel‐1 data to measure surface motions for the ~800,000 km2 Anatolian region. Our new 3D velocity and strain rate fields illuminate deformation patterns dominated by westward motion of Anatolia relative to Eurasia, localized strain accumulation along the North and East Anatolian Faults, and rapid vertical signals associated with anthropogenic activities and to a lesser extent extension across the grabens of western Anatolia. We show that automatically processed Sentinel‐1 InSAR data can characterize details of the velocity and strain rate fields with high resolution and accuracy over large regions. These results are important for assessing the relationship between strain accumulation and release in earthquakes.This research was supported by the Natural Environmental Research Council (NERC) through the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics, the Looking inside the Continents from Space large grants to Oxford (NE/K011006/1), Leeds (NE/K010867/1), and Newcastle (NE/K010794/1) Universities, and the Earthquakes without Frontiers project (EwF_NE/J02001X/1_1). JRW is also supported by the German Research Foundation (DFG) and the State of Brandenburg, TJW by the Royal Society, YM by the Japan Society for the Promotion of Science Overseas Research Fellowship, and HW by the NSFC (41672205). GMT [Wessel et al., 2013] was used to create the figures presented in this paper.Peer reviewe