TOKYO - An earthquake with a preliminary magnitude of 6.3 struck off Miyagi Prefecture, northeastern Japan, on Friday, the country's weather agency said.

No immediate injuries or damage have been reported.

The temblor occurred at 8:22 pm local time at a depth of 50 km, measuring lower 5 on Japan's seismic scale of 7 in the hardest-hit areas in Miyagi Prefecture, said the Japan Meteorological Agency (JMA).

The quake's epicenter was located off the coast of Miyagi at a latitude of 38.9 degrees north and a longitude of 142.1 degrees east.

No tsunami warning was issued, according to the JMA.