Seismic versus aseismic slip for the 2023 Kahramanmaraş earthquake doublet

IF 14.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2025-01-22 DOI:10.1038/s41467-025-56350-7

Rumeng Guo, Xiongwei Tang, Yijun Zhang, Wenting Zhang, Ming Qin, Jianqiao Xu, Jiangcun Zhou, Xuhao Zou, Heping Sun

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Abstract

Interplay between seismic and aseismic slip could shed light on the frictional properties and seismic potential of faults. The well-recorded 2023 Kahramanmaraş earthquake doublet provides an excellent opportunity to understand their partitioning on strike-slip faults. Here, we utilize InSAR and strong motion data to derive the coseismic rupture during the doublet, ~4-month postseismic afterslip, and slip distributions of two Mw>6.0 aftershocks. Our results show that afterslip appears to be complementary to coseismic slip and aftershocks, accounting for ~11.3% of the coseismic moment. Aftershocks mainly fall within the regions of positive Coulomb stresses caused by afterslip and follow a temporal decay similar to that of afterslip, indicating that aftershock production is the failure of small asperities loaded by the afterslip. The early postseismic afterslip is released ~93.7% aseismically and ~6.3% seismically by aftershocks. Our modeling results thus depict a complex fault system with highly variable slip patterns and stresses.

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2023年kahramanmaraki地震双峰的地震与地震滑动

地震和地震滑动之间的相互作用可以揭示断层的摩擦特性和地震潜力。记录良好的2023年kahramanmaraki地震双重波为了解它们在走滑断层上的划分提供了极好的机会。本文利用InSAR和强震数据推导了两次6.0级余震的同震破裂、震后约4个月的余震和余震分布。结果表明，余震与同震滑动和余震是互补的，约占同震力矩的11.3%。余震主要落在余震引起的正库仑应力区域内，并遵循与余震相似的时间衰减，表明余震的产生是余震荷载下小颗粒的破坏。震后早期余震在地震中释放约93.7%，在地震中释放约6.3%。因此，我们的建模结果描绘了一个具有高度可变滑动模式和应力的复杂断层系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.