A CHARACTERIZED FAULT MODEL WITH SHALLOW SUBSURFACE SLIPS FOR REPRODUCING LARGE-AMPLITUDE PULSE-LIKE VELOCITY WAVEFORMS AND PERMANENT DISPLACEMENTS OBSERVED VERY CLOSE TO THE SEISMIC FAULT FOR THE 2023 KAHRAMANMARAŞ EARTHQUAKE (M_W7.8) IN TÜRKIYE

Abstract

We have done a forward modeling of a characterized fault model, which consists of SMGA’s (Strong Motion Generation Areas), LMGA’s (Long-period Motion Generation Areas) and background areas, for simulating velocity and displacement waveforms observed very close to the seismic faults and crustal deformations during the 2023 Kahramanmaraş earthquake (M_w7.8) in Türkiye. Observed large-amplitude velocity pulses and permanent displacements along the fault have successfully been reproduced by the proposed characterized fault model. We have also examined effects of SMGA and LMGA on near-fault ground motion characteristics.