Simulation of ground motion propagation during the 2016 Gyeongju Earthquake in Korea

Abstract

In low and moderate seismic areas, only limited recorded ground motion data is available. In Korea, the Gyeongju earthquake (M=5.8) occurred on September 12, 2016, which was the largest earthquake since earthquake recording was started in Korean peninsula. During this earthquake, valuable information on ground motions was collected by various recording stations distributed widely in Korean peninsula. In this study, a point source model is constructed to accurately simulate ground motions recorded at different recording stations with different soil conditions during the Gyeongju earthquake. Using this model, ground motions are generated at all grid locations of Korean peninsula. Each grid size has 0.1 0.1  .Then a contour hazard map is constructed using the peak ground acceleration of the simulated ground motions.