TY - JOUR
TI - Source Mechanism and Rupture Process of the 24 January 2020 Mw 6.7 Doğanyol–Sivrice Earthquake obtained from Seismological Waveform Analysis and Space Geodetic Observations on the East Anatolian Fault Zone (Turkey)
AU - Taymaz, T.
AU - Ganas, A.
AU - Yolsal-Çevikbilen, S.
AU - Vera, F.
AU - Eken, T.
AU - Erman, C.
AU - Keleş, D.
AU - Kapetanidis, V.
AU - Valkaniotis, S.
AU - Karasante, I.
AU - Tsironi, V.
AU - Gaebler, P.
AU - Melgar, D.
AU - Öcalan, T.
JO - TECTONOPHYSICS
PY - 2021
VL - 804
TODO - null
SP - null
PB - Elsevier B.V.
SN - 0040-1951
TODO - 10.1016/j.tecto.2021.228745
TODO - Deformation;  Earthquakes;  Geodesy;  Space-based radar;  Synthetic aperture radar;  Waveform analysis, Continental deformation;  Earthquake mechanics;  Geodetic observation;  Interferometric synthetic aperture radars;  Rupture propagation;  Rupture velocities;  Seismic displacement;  Source time functions, Fault slips, active fault;  earthquake event;  earthquake magnitude;  earthquake rupture;  fault zone;  geodesy;  numerical model;  seismicity;  slip rate;  spatiotemporal analysis;  strike-slip fault;  waveform analysis, Anatolia;  Turkey, Meleagris gallopavo
TODO - Here, we present the source mechanism and rupture process for the destructive 24 January 2020 Mw 6.7 Doğanyol–Sivrice earthquake at the East Anatolian Fault Zone (EAFZ, Turkey), obtained from seismological waveform analysis and space geodetic observations. Multi-data analyses and modelling in the present study provide fundamental data and strong constraints for retrieving complex source mechanism of an earthquake and its spatiotemporal slip characteristics along the ruptured segment of fault. The acquired slip model of this earthquake reveals heterogeneous slip distribution along strike N244°E of the fault plane dipping NW (68°) with duration of the source time function (STF) and low stress drop value (Δσ) of ~25 s and ~6 bars, respectively. Back-projection analysis validates fault length (L) stretching along strike for a distance of ~75 km and supports predominant south-westerly bilateral rupture propagation with a variable rupture velocity (Vr) of ~2.3–3.4 km/s along with two main patches, presumably a sequence of two asperities being ruptured following the surface trace of the EAFZ. The distribution of aftershocks based on the analysis of two months long data consistently confirms spreading of seismicity along the ruptured fault. The evaluation of Interferometric Synthetic Aperture Radar (InSAR) data reveals that left-lateral co-seismic slip and significant deformation extends for ~20 km on either side of the fault with evident post-seismic displacement. Yet, no significant vertical offsets were observed as GNSS stations detected only horizontal motions. Coda-wave analysis as an independent tool also confirms moment magnitude of Mw 6.7. Our results highlight a case of a damaging earthquake and enhance our understanding of earthquake mechanics, continental deformation and augmented earthquake risk on the EAFZ. © 2021 Elsevier B.V.
ER -