TOKYO -- A 4.9-magnitude earthquake struck off the coast of northern Japan on Tuesday, the country's meteorological agency said.

There was no risk of a tsunami, the agency said, and there were no immediate reports of any damage.

The tremor struck at 8:53 pm (2353 GMT Monday), with the epicenter in the Pacific Ocean off Fukushima prefecture, the agency said.

The quake struck about 10 kilometers below sea level, according to the agency.

Around 20 percent of the world's most powerful earthquakes strike Japan.