Being in a stable continental region (SCR) with a limited history of instrumentation, South Korea has not collected sufficient instrumental data for data-driven ground motion models. To address this limitation, we investigated the suitability of the hybrid ground motion simulation method that Graves and Pitarka (2010, 2015) proposed for simulating earthquake ground motions in South Korea. The hybrid ground motion simulation method used in this study relies on region-specific parameters to accurately model phenomena associated with the seismic source and the wave propagation. We initially employed relevant models and parameters available in the literature as a practical approach. We incorporated a three-dimensional velocity model developed by Kim et al. (2017) and a one-dimensional velocity model presented by Kim et al. (2011) to account for the crustal velocity structure of the Korean peninsula. To represent the earthquake source, we utilized Graves and Pitarka’s rupture generator algorithm along with a magnitude-area scaling relationship developed for SCR by Leonard (2014). Additionally, we assumed the stress and attenuation parameters based on studies of regional seismicity. Using the implemented platform, we simulated the 2016 Mw5.57 Gyeongju earthquake and the 2017 Mw5.4 Pohang earthquake. Subsequently, we compared results with recorded accelerations and an empirical ground motion prediction equation at strong motion stations. Our simulations had an overall satisfactory agreement with the recorded ground motions and demonstrated the potential of broadband hybrid ground motion simulation for engineering applications in South Korea. However, limitations remain, such as the underestimation of long-period ground motions during the 2017 Pohang earthquake and the lack of a model to predict the ground motion amplification associated with the near-surface site response accurately. These limitations underscore the importance of careful validation and refinement of region-specific models and parameters for practically implementing the simulation method.

A B S T R A C T
1. 서 론
2. 연구 방법
    2.1 지반운동 시뮬레이션
    2.2 시뮬레이션 대상 지진 및 지역
    2.3 시뮬레이션 적용 입력 변수 및 속도 모델
3. 지반운동 시뮬레이션 결과
    3.1 2016년 경주 지진(ML 5.8)
    3.2 2017년 포항 지진(ML 5.4)
4. 결 론
감사의 글
REFERENCES

• 김재휘(University of Canterbury 토목공학과 박사과정) | Kim Jaehwi (Graduate Student, Department of Civil and Natural Resources Engineering, University of Canterbury)
• Bae Sung Eun(QuakeCoRE/University of Canterbury 수석프로그래머)
• Bradley, Brendon A.(University of Canterbury 교수)
• 정석호(창원대학교 토목공학과 조교수) | Jeong Seokho (Assistant Professor, Department of Civil Engineering, Changwon National University) Corresponding author