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Articles | Volume 16, issue 2
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.
https://doi.org/10.5194/se-16-197-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 2
Research article
 | 
27 Feb 2025
Research article |  | 27 Feb 2025

Quaternary surface ruptures of the inherited mature Yangsan Fault: implications for intraplate earthquakes in southeastern Korea

Sangmin Ha, Hee-Cheol Kang, Seongjun Lee, Yeong Bae Seong, Jeong-Heon Choi, Seok-Jin Kim, and Moon Son

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Latest update: 02 Nov 2025
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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. 
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