文章来源：Chunmei Ren, Zexin Wang, Tuncay Taymaz, Nan Hu, Heng Luo, Zeyan Zhao, Han Yue,Xiaodong Song, Zhengkang Shen, Haoyu Xu, Jianghui Geng, Wei Zhang, Teng Wang, Zengxi Ge1,T. Serkan Irmak, Ceyhun Erman, Yijian Zhou, Zhen Li, Hang Xu, Bonan Cao, Hongyang Ding. (2024). Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet. Science383, 305-311. https://doi.org/10.1126/science.adi1519.

整理人：徐嘉苗，2021级本科生

整理时间：2024年6月3日

Abstract: On 6 February 2023, two large earthquakes (moment magnitude 7.8 and 7.6) shocked a vast area of southeastern Türkiye and northern Syria, leading to heavy casualties and economic loss. To investigate the rupture process over multiple fault segments, we performed a comprehensive analysis of local seismic and geodetic data and determined supershear ruptures on the initial branch and the Pazarcık and Erkenek segments and subshear ruptures on the Amanos segment of event 1. The bilateral rupture of event 2 also presents distinct sub- and supershear velocities. The dynamic stress of the branch fault rupture triggered the Pazarcık segment initial rupture at a point 9 kilometers west of the junction of these two faults, boosting the supershear rupture of the Pazarcık segment of the main fault. The geometry and prestress level of multiple segments controlled the rupture behaviors and influenced the ground shaking intensity.

摘要：2023年2月6日，土耳其东南部和叙利亚北部广大地区遭受两次大型地震（矩震级分别为7.8和7.6）的冲击，导致重大人员伤亡和经济损失。为了研究跨越多个断层段的破裂过程，我们对局部地震学和地球动力学数据进行了全面分析，确定了事件1中初始分支及Pazarcık和Erkenek断层段的超剪切破裂，以及Amanos断层段的亚剪切破裂。事件2的双向破裂也展现出明显的亚剪切和超剪切速度。分支断层的破裂产生的动态应力在两断层交界处以西9公里的位置触发了Pazarcık断层段的初始破裂，增强了主断层Pazarcık段的超剪切破裂。多断层段的几何结构和预应力水平控制了破裂行为，并影响了地面震动的强度。

图 同震变形和滑移模型

图 事件1破裂动力学分析

图 断层段应力

原文链接：https://www.science.org/doi/10.1126/science.adi1519 

节选转引：https://mp.weixin.qq.com/s/MmTGvRrcpwdM9JiFAjOgXQ