Coseismic surface deformation and fault model of the 27 May 2017 Mw 5.2 SaruhanlıManisa (western Turkey) earthquake from InSAR

Abstract

The shortened revisit times and accurate orbits of the new generation of radar satellites like Sentinel-1 improved the applicabilityof the synthetic aperture radar interferometry (InSAR) technique to investigate more moderate size events. Here the technique is usedto characterize the 27 May 2017 Mw 5.2 Saruhanlı (Manisa) earthquake that took place in western Turkey in the Gediz Graben. Thoughseismological focal mechanism solutions of the earthquake clearly indicated that the event is due to normal faulting, the nodal planeambiguity and the presence of two closely located faults in the epicentral region prevented the assessment of the causative fault. Datafrom the Sentinel-1 radar satellites and subsequent modeling indicate that a 9-km-long, NE-dipping fault had ruptured during theearthquake with the shallow rupture coinciding with the Ozanca Fault in the region.