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Rupture Dynamics and Near-Fault Ground Motion of the Mw7.8 Kahramanmaraş, Turkey earthquake of February 6, 2023

Rupture Dynamics and Near-Fault Ground Motion of the Mw7.8 Kahramanmaraş, Turkey earthquake of February 6, 2023

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.26443/seismica.v4i1.1432. This is version 2 of this Preprint.

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Authors

Hideo Aochi, Víctor M. Cruz-Atienza 

Abstract

We studied the dynamic rupture propagation of the February 6th, 2023 (Mw7.8, 01:17 UTC) Pazarcık (Kahramanmaraş), Turkey, earthquake by incorporating the non-planar fault structure, the regional stress field, and a data-driven friction parameterization into numerical simulations. To explain the rupture extent of 200 km and the average speed, a regional non-uniform load is necessary and was determined from the orientation and intensity of the principal stresses. Careful analysis of near-fault strong motions suggests that the critical slip-weakening distance (D_c) varies smoothly along the fault strike (between 0.6 - 1.2 m) with mean val...  more

DOI

https://doi.org/10.31223/X5QX4R

Subjects

Physical Sciences and Mathematics

Keywords

Rupture dynamics, fault friction, regional stress field, strong motions, 2023 Mw7.8 Kahramanmaraş Turkey earthquake

Dates

Published: 2024-08-28 12:59

Last Updated: 2024-08-29 01:19

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License

CC BY Attribution 4.0 International