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.

在这里，我们目前的震源机制和破裂过程的破坏性2020 1月24日的Mw 6.7 Doğanyol-Sivrice在东安纳托利亚断裂带（EAFZ，土耳其）的地震，地震从波形分析和空间大地测量观测获得。本研究中的多数据分析和建模为检索地震的复杂震源机制及其沿断裂破裂段的时空滑动特征提供了基础数据和强大的约束条件。所获得的地震滑动模型显示出沿断层N244°E走向NW（68°）的走向的非均匀滑动分布，具有源时间函数（STF）的持续时间和低应力降值（Δσ）分别为〜25 s和〜6 bar。反投影分析验证了沿走向延伸约75 km的断层长度（L），并支持了以可变破裂速度（Vr）的速度约为2.3–3.4 km / s，并伴有两个主要斑块，大概是随着EAFZ的表面痕迹而破裂的两个凹凸序列。根据两个月之久的数据的分析，余震的分布一致地证实了地震活动性沿着断裂断裂的扩展。干涉合成孔径雷达（InSAR）数据的评估显示，断层两侧左右共震滑移和明显变形延伸了约20 km，并伴有明显的地震后位移。但是，由于GNSS站仅检测到水平运动，因此未观察到明显的垂直偏移。尾波分析作为独立工具，也可确定Mw 6.7的矩大小。我们的结果突出了一个破坏性地震的案例，并增强了我们对EAFZ上地震力学，大陆变形和增加地震风险的了解。