Seismotectonic Zoning By K-Means Clustering Analysis In The Korean Peninsula

It is not easy to identify seismic source zone for use in probabilistic seismic hazard analysis in the intraplate region. There is no unique formal procedure for developing and evaluating seismic source models. The K-means cluster analysis is applied to seismicity data as a point source to delineate seismotectonic model for the Korean Peninsula in this study. The number of clusters K determined by KL index and Elbow methods appears to be five and nine, respectively. A seismotectonic model composed of five source zones is developed and an alternative model with nine zones is also proposed. Seismicity parameters estimated in each zone are presented.