Study on the determination of seismic source parameters in the Korean Peninsula

The Korean Peninsula has long been recognized as a stable intraplate region with relatively low seismic activity. However, moderate-to-large earthquakes, such as the 2016 Gyeongju earthquake and the 2017 Pohang earthquake, have highlighted the necessity for systematic studies on the seismic characteristics of the region. This study aims to understand the seismic characteristics of the Korean Peninsula by estimating key seismic source parameters (seismic moment, moment magnitude, stress drop, and corner frequency) for major earthquakes. 
Using the Brune source model (Brune, 1970) as a basis, spectral analysis was conducted to determine the source parameters of the 2016 Gyeongju earthquake, and the results were validated through comparisons with previous studies. After verifying the results, the established framework was applied to automatically determine the seismic source parameters for earthquakes of magnitude 3.0 or greater that occurred in the Korean Peninsula after 2010. Regional comparisons of stress drop values were also conducted based on the determined results.
The framework developed in this study aims to automatically determine seismic source parameters for future earthquakes of magnitude 3.0 or greater in the Korean Peninsula. This advancement is expected to enhance the quantitative understanding of seismic activity in the region and provide a crucial foundation for future studies on seismic activity and region-specific seismic hazard assessments.