Dynamics of episodic supershear in the 2023 M7.8 Kahramanmaraş/Pazarcik earthquake, revealed by near-field records and computational modeling

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Acknowledgement

The authors would like to thank associate editor Carolina Ortiz Guerrero, Eric Dunham and an anonymous reviewer for their constructive comments that improved this manuscript. The ground motion data used in this study can be obtained from Turkish Disaster and Emergency Managment Authority AFAD, US Geological Survey (USGS), and Kandilli Observatory And Earthquake Research Institute. We would like to thank the Turkish Disaster and Emergency Management Presidency (AFAD) for setting up dense near-fault observatories, and for immediately publishing a huge number of openly accessible accelerometers during these trying times for Türkiye. A.J.R. acknowledges support by the Caltech/MCE Big Ideas Fund (BIF), as well as the Caltech Terrestrial Hazard Observation and Reporting Center (THOR). He would also like to acknowledge the support of NSF (Grant EAR-2045285). A.E. acknowledges support from the Southern California Earthquake Center through a collaborative agreement between NSF. Grant Number: EAR0529922 and USGS. Grant Number: 07HQAG0008 and the National Science Foundation CAREER award No. 1753249 for modeling complex fault zone structures. We are grateful to Idaho National Lab for providing High performance computing support and access and for the MOOSE/Falcon team for offering technical support. Funding provided by DOE EERE Geothermal Technologies Office to Utah FORGE and the University of Utah under Project DE-EE0007080 Enhanced Geothermal System Concept Testing and Development at the Milford City, Utah Frontier Observatory for Research in Geothermal Energy (Utah FORGE) site.

Acknowledgement

The mapped surface rupture data are from https://doi.org/10.5066/P985I7U217. All the ground motion records used in this study are obtained from AFAD2. Fig. 1 was produced using QGIS based on map data from Natural Earth.

Code Availability

The software used to conduct the dynamic rupture model and input files required to reproduce the results presented in this manuscript is available on github (https://github.com/chunhuizhao478/farmscode.git).

Contributions

These authors contributed equally: Mohamed Abdelmeguid, Chunhui Zhao.

M.A.: led the study, performed the station analysis, participated in the dynamic rupture modeling; designed the figures and tables; participated in the interpretation of the results; wrote the original draft. C.Z.: performed the dynamic rupture modeling; designed the figures and tables; participated in the interpretation of the results; wrote the original draft. E.Y.: performed seismic station analysis; participated in the interpretation of the results; wrote original draft. G.G.: performed seismic station analysis; participated in the interpretation of the results; wrote the original draft. A.E. & A. R.: concieved and supervised the study and wrote original draft. All authors contributed to finalize the manuscript.

Conflict of Interest

The authors declare no competing interests.