Decoding Stress Patterns of the 2023 Türkiye-Syria Earthquake Doublet

IF 3.9 2区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Jianquan Chen, Chang Liu, Luca Dal Zilio, Jianling Cao, Hui Wang, Guangliang Yang, Oğuz H. Göğüş, Hang Zhang, Yaolin Shi
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引用次数: 0

Abstract

Earthquake interaction across multiple time scales can reveal complex stress evolution and rupture patterns. Here, we investigate the role of static stress change in the 2023 Mw 7.8 and 7.6 earthquake doublet along the East Anatolian Fault (EAF), using simulations of 19 historical earthquakes (M ≥ 6.1) and the 2023 earthquake doublet from 1822 to 2023. Focusing on six cascading sub-events during the 2023 Kahramanmaraş earthquake doublet, we reveal how one sub-event's stress alteration can impact the emergence and rupture of subsequent sub-events. Our analysis unveils that the 2023 Mw 7.8 earthquake was delayed due to stress shadow effects from historical events, while the 2023 Mw 7.6 earthquake was accelerated as a result of stress increases from historical events and ultimately triggered by the 2023 Mw 7.8 earthquake. This study underscores the importance of grasping earthquake preparation, rupture initiation, propagation, and termination in the context of intricate fault systems worldwide. Based on these results, we draw attention to increased seismic hazards in the Elazig-Bingol seismic gap of the EAF and the northern section of the Dead Sea Fault (DSF), necessitating increased monitoring and preparedness efforts.

解码 2023 年图尔基耶-叙利亚双重地震的应力模式
跨越多个时间尺度的地震相互作用可以揭示复杂的应力演变和断裂模式。在此,我们通过模拟 19 次历史地震(M ≥ 6.1)和 2023 年东安纳托利亚断层(EAF)双地震(从 1822 年到 2023 年),研究了静应力变化在 2023 年 Mw 7.8 和 7.6 双地震中的作用。我们重点研究了 2023 年卡赫拉曼马拉什双地震中的六个级联子事件,揭示了一个子事件的应力变化如何影响后续子事件的出现和破裂。我们的分析揭示了 2023 年 7.8 级地震由于历史事件的应力阴影效应而延迟,而 2023 年 7.6 级地震由于历史事件的应力增加而加速,并最终由 2023 年 7.8 级地震触发。这项研究强调了在全球错综复杂的断层系统中把握地震准备、破裂开始、传播和终止的重要性。基于这些结果,我们提请人们注意,东亚断裂带 Elazig-Bingol 地震缺口和死海断裂(DSF)北段的地震危险性增加,有必要加强监测和防备工作。
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来源期刊
Journal of Geophysical Research: Solid Earth
Journal of Geophysical Research: Solid Earth Earth and Planetary Sciences-Geophysics
CiteScore
7.50
自引率
15.40%
发文量
559
期刊介绍: The Journal of Geophysical Research: Solid Earth serves as the premier publication for the breadth of solid Earth geophysics including (in alphabetical order): electromagnetic methods; exploration geophysics; geodesy and gravity; geodynamics, rheology, and plate kinematics; geomagnetism and paleomagnetism; hydrogeophysics; Instruments, techniques, and models; solid Earth interactions with the cryosphere, atmosphere, oceans, and climate; marine geology and geophysics; natural and anthropogenic hazards; near surface geophysics; petrology, geochemistry, and mineralogy; planet Earth physics and chemistry; rock mechanics and deformation; seismology; tectonophysics; and volcanology. JGR: Solid Earth has long distinguished itself as the venue for publication of Research Articles backed solidly by data and as well as presenting theoretical and numerical developments with broad applications. Research Articles published in JGR: Solid Earth have had long-term impacts in their fields. JGR: Solid Earth provides a venue for special issues and special themes based on conferences, workshops, and community initiatives. JGR: Solid Earth also publishes Commentaries on research and emerging trends in the field; these are commissioned by the editors, and suggestion are welcome.
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