Characteristics of Strong Ground Motions in the 30 October 2020, MW6.9 Aegean Sea Earthquake

The eastern parts of the Aegean Sea were struck by a destructive M W 6.9 earthquake on 30 October 2020 at 11:51:27 UTC. ruptured an East-West trending normal fault in between northern coast Samos Island and southern İzmir also triggered medium level tsunami thousands aftershocks across region. 119 fatalities, 1,051 injuries, many collapsed buildings reported due to affected most catastrophic consequences registered Bayraklı Bornova districts, which are built deep alluvial Basin approximately 60–70 km away from epicentre mainshock. This paper explains damage with extensive dataset ground motion records mainshock aftershocks, provided both Greek Turkish networks. A set parameters such as peak ordinates, spectral quantities, intensity measures duration calculated analysed. closest softer soil station produces highest acceleration velocity. models employed commonly for region overestimate observed data beyond Joyner-Boore distance except recently published local model, utilises earthquakes derivation model. Contrary expectations, stiff recordings exhibit considerable accelerations long period region, similar those soft soils. correlated results hybrid reconnaissance mission, organized Earthquake Engineering Field Investigation Team (EEFIT). Although values regarded clearly highlight variability conditions damaged area (Bayraklı Bornova), velocity-based seem be more responsive indicators. shapes normalised response spectra not compatible 2018 seismic code spectrum whereas their below 475-years return design outdated current codes.