Articles | Volume 16, issue 2
https://doi.org/10.5194/se-16-197-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-16-197-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Feb 2025
Research article |
| 27 Feb 2025
| 27 Feb 2025
Quaternary surface ruptures of the inherited mature Yangsan Fault: implications for intraplate earthquakes in southeastern Korea
Sangmin Ha
Department of Geological Sciences, Pusan National University, Busan 46241, South Korea
Department of Geography Education, Korea University, Seoul 02841, South Korea
Hee-Cheol Kang
Department of Geological Sciences, Pusan National University, Busan 46241, South Korea
Institute of Geohazard Research, Pusan National University, Busan 46241, South Korea
Seongjun Lee
Department of Geological Sciences, Pusan National University, Busan 46241, South Korea
Department of Geotechnology & Infrastructure, Byucksan Engineering, Seoul 08380, South Korea
Yeong Bae Seong
Department of Geography Education, Korea University, Seoul 02841, South Korea
Jeong-Heon Choi
Research Center of Earth and Environmental Sciences, Korea Basic Science Institute, Chungbuk 28119, South Korea
Seok-Jin Kim
Research Center of Earth and Environmental Sciences, Korea Basic Science Institute, Chungbuk 28119, South Korea
Conservation Science Division, National Research Institute of Cultural Heritage, Daejeon 34122, South Korea
Moon Son
CORRESPONDING AUTHOR
Department of Geological Sciences, Pusan National University, Busan 46241, South Korea
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Short summary
Unlike episodic plate boundary earthquakes, their randomness makes predicting intraplate earthquakes challenging. This study aids in understanding intraplate earthquake behavior by analyzing paleo-earthquake records of the Yangsan Fault in Korea. Five trench sites revealed six Quaternary earthquakes, the latest 3000 years ago, with Mw 6.7–7.1. The right-lateral fault has a 0.13 mm yr-1 slip rate and a recurrence interval of over 13000 years; it has been continuously active since the Quaternary.
Unlike episodic plate boundary earthquakes, their randomness makes predicting intraplate...
