AI Article Synopsis
- The destructive 2023 earthquake doublet in Turkey, with magnitudes 7.8 and 7.7, affected multiple segments of the East Anatolian Fault system.
- The analysis incorporated various seismic and space-geodetic observations, revealing complex rupture dynamics, including three slip episodes during the 7.8 earthquake and a larger slip for the 7.7 event occurring 9 hours later.
- The study emphasizes the need for integrating different types of observational data and models to better understand fault interactions and improve seismic hazard assessments.
Article Abstract
The destructive 2023 moment magnitude () 7.8-7.7 earthquake doublet ruptured multiple segments of the East Anatolian Fault system in Turkey. We integrated multiscale seismic and space-geodetic observations with multifault kinematic inversions and dynamic rupture modeling to unravel the events' complex rupture history and stress-mediated fault interactions. Our analysis reveals three subshear slip episodes during the initial 7.8 earthquake with a delayed rupture initiation to the southwest. The 7.7 event occurred 9 hours later with a larger slip and supershear rupture on its western branch. Mechanically consistent dynamic models accounting for fault interactions can explain the unexpected rupture paths and require a heterogeneous background stress. Our results highlight the importance of combining near- and far-field observations with data-driven and physics-based models for seismic hazard assessment.
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| http://dx.doi.org/10.1126/science.adi0685 | DOI Listing |
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