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Emergency officials have received more than 140 calls from residents saying they felt the ground shaking. The calls were mostly from the central North Chungcheong province but also from Gyeonggi province surrounding the capital, Seoul, and the southern North and South Gyeongsang provinces, according to the weather agency and government officials.

Central government and North Chungcheong provincial officials said they weren't aware of any damage.

Kim Dong-wook, a resident in the central city of Chungju, told news channel YTN that he heard rumblings in the ground and that windows “rattled like during a typhoon.� He said he saw plates and bowls scattered across the floor of a restaurant in the building where he lives but he didn’t know of anyone being hurt.

The office of South Korean President Yoon Suk Yeol said he instructed officials to also review the safety of electricity and telecommunication systems, although there were no immediate reports of problems.

South Korea’s Nuclear Safety and Security Commission said the earthquake didn’t pose a threat to the safety of nuclear power reactors in the country’s southeastern regions. It also said the earthquake didn’t affect a research reactor in the central city of Daejeon, which is about 70 kilometers (43 miles) from where the quake occurred.