Natália Verkinová, Jiří Zahradník

This study evaluates the limitations of the ISOLA software in estimating rupture velocity by using synthetic tests that mimic the 2023 Turkish Mw 7.8 earthquake. Two types of slip-distribution models, point-like and continuous, were used as input for synthetic seismogram generation, which were then inverted using ISOLA multiple-point-source (MPS) approach. Key parameters affecting the software performance, such as earthquake source mechanism and subevent time function, were analyzed under various configurations, including different ISOLA executable versions and focal mechanism constraints. The findings underscore the limitations of ISOLA in resolving complex fault dynamics, with significant issues in both subevent timing and mechanism fidelity impacting the accurate estimation of rupture velocity.