It turned out that there had already been dozens of ground subsidences before a large ground subsidence occurred near Naksan Beach in Yangyang-gun, Gangwon-do on the morning of the 3rd.
The Ministry of Land, Infrastructure and Transport said that from the end of December last year to the middle of February of this year, there were 27 ground-offs around the nearby construction site.
Construction has already been stopped and resumed due to safety issues, but in the end, a large ground collapse occurred, leading to an accident where the convenience store building collapsed.
The Ministry of Land, Infrastructure and Transport established the Central Underground Accident Investigation Committee immediately after the accident, and so far, groundwater leaks into the sand-rich ground have been blamed for the swept away of the soil.