Source Parameter Estimates and Energy Scaling of Small-to-Moderate Earthquakes in the Marmara Sea Region, NW Türkiye: A Comparative Study Using Coda Wave Analysis with CCT

Reliable seismic source parameter estimates are essential for making effective seismic hazard assessments in earthquake prone regions. The Sea of Marmara, NW Türkiye, and its environs located on a major fault with a history of destructive earthquakes. The utilization of seismic coda waves has a long history in providing valuable insights into the source properties, energy release at the foci, and attenuation characteristics of the Earth's crust. In the study region where we have previously demonstrated efficiency of the automated coda wave analysis with robust seismic moment and energy estimates using Qopen approach that enables modeling coda wave envelopes via a non-empirical inversion procedure to provide earthquake source properties. Here we aim to extend the initial framework by integrating comparative insights with the Coda Calibration Tool (CCT), a well-established empirical coda wave technique, to further develop a local earthquake catalogue with relatively small events (M_w ≤ 2.5) following the coda calibration of events between 2018 and 2020 with magnitudes 2.5 ≤ M_L ≤ 5.7. The findings of this study will provide a basis for comparison between empirical and non-empirical coda approaches, which has not been done previously in this region.