Group A, Poster #237, Ground Motions
Prediction of ground motion in South Korea based on physics-based broadband ground motion simulation
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Poster Presentation
2022 SCEC Annual Meeting, Poster #237, SCEC Contribution #12386 VIEW PDF
a for data-driven ground motion models. In an attempt to address this limitation, we implemented the physics-based hybrid broadband ground motion simulation method of Graves and Pitarka (2010, 2015), by modifying the simulation platform of QuakeCoRE, to simulate earthquakes in South Korea accounting for the crustal velocity structure and seismological characteristics of the Korean peninsula. For crustal velocity models, we implemented a three-dimensional velocity model by Kim et al. (2017) and a one-dimensional velocity model by Kim et al. (2011). To generate kinematic source models, we implemented Graves and Pitarka’s rupture generator, with a magnitude-area scaling relationship developed for SCR by Leonard (2014). Using the implemented simulation platform, we successfully simulated the 2016 M5.5 9.12 earthquake and the 2017 M5.4 Pohang earthquake and compared results with recorded ground accelerations at strong motions stations. While our work demonstrated the potential of physics-based ground motion simulation in South Korea, it also suggested the need for further validation of the simulation method for earthquake engineering applications in South Korea.
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