TOKYO (AP) -- A fairly strong earthquake with a preliminary magnitude of 5.7 jolted northern Japan Monday, but there were no immediate reports of damage or injuries.

The quake, which hit at 10:35 a.m., was centered about 25 miles beneath the floor of the Pacific Ocean 65 miles off the coast of Miyagi Prefecture (state), the Meteorological Agency said.

There was no danger of tsunami, or undersea waves set off by volcanic activity or earthquakes, the agency said.

The earthquake slightly swayed office buildings in Tokyo, but it was most strongly felt in northwestern cities, including Ofunato in Miyagi and Morioka in Iwate Prefecture.

Ofunato, a Pacific coastal town, is 250 miles, north of Tokyo, and Morioka is 290 miles north of the capital.

 A quake of magnitude 5 can cause damage to homes if it occurs in a residential area. Japan is one of the world's most  earthquake-prone nations.