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Science. 2018 Jun 1;360(6392):1007-1009. doi: 10.1126/science.aat6081. Epub 2018 Apr 26.

Assessing whether the 2017 Mw 5.4 Pohang earthquake in South Korea was an induced event.

Author information

1
Department of Geological Science, Pusan National University, Busan 46241, Republic of Korea. kwanghee@pusan.ac.kr reejh@korea.ac.kr.
2
Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea. kwanghee@pusan.ac.kr reejh@korea.ac.kr.
3
School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea.
4
Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea.
5
Department of Geological Science, Pusan National University, Busan 46241, Republic of Korea.

Abstract

The moment magnitude (Mw) 5.4 Pohang earthquake, the most damaging event in South Korea since instrumental seismic observation began in 1905, occurred beneath the Pohang geothermal power plant in 2017. Geological and geophysical data suggest that the Pohang earthquake was induced by fluid from an enhanced geothermal system (EGS) site, which was injected directly into a near-critically stressed subsurface fault zone. The magnitude of the mainshock makes it the largest known induced earthquake at an EGS site.

PMID:
29700224
DOI:
10.1126/science.aat6081

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