A strong earthquake with a magnitude of 5.8 struck eastern Hokkaido Prefecture on Saturday, prompting authorities to urge vigilance.
The quake, which occurred at 1:40 a.m. at a depth of 40 kilometers off the southeastern coast of the Nemuro Peninsula, measured a lower 5 on the Japanese seismic intensity scale in the city of Nemuro.
According to the Meteorological Agency,
there was no threat of tsunami, but people in affected areas are advised to remain alert for more temblors measuring up to a lower 5 for about a week.
The agency noted that the quake occurred at the boundary of two plates, where an ocean plate is subducting beneath a land plate.
Author's summary: Strong quake hits Hokkaido, authorities warn of more temblors.