A strong earthquake struck eastern areas of Hokkaido Prefecture on Saturday, prompting warnings of potential future quakes.
The quake, with a magnitude of 5.8, reached a lower 5 on the Japanese seismic intensity scale in the city of Nemuro.
People in affected areas should remain alert for more temblors measuring up to a lower 5 for about a week.
The earthquake occurred at the boundary of two plates, where an ocean plate is subducting beneath a land plate, according to the Meteorological Agency.
Author's summary: Strong quake hits Hokkaido, authorities warn of more.