Seismic and Geodetic Imaging (DInSAR) Investigation of the March 2021 Strong Earthquake Sequence in Thessaly, Central Greece

Three strong earthquakes ruptured the northwest Thessaly area, Central Greece, on 3, 4 and 12 March 2021. Since area did not rupture by in instrumental period of seismicity, it is great interest to understand seismotectonics source properties these earthquakes. We combined relocated hypocenters, inversions teleseismic P-waveforms InSAR data, moment tensor solutions produce three fault models. The first shock (Mw = 6.3) occurred a segment strike 314° dip NE41°. It caused surface subsidence ?40 cm seismic slip 1.2–1.5 m at depth ~10 km. second earthquake 6.2) NW an antithetic subparallel (strike 123°, SW44°). Seismic 1.2 ~7 km, while ?10 was determined. Possibly same further 5.7, 112°, SSW42°) that ground ?5 1.0 concluded blind, unknown unmapped so far normal segments were activated, entire system which forms graben-like structure Thessaly.