An offshore quake with a magnitude of 6.2 has shaken northeastern Japan but no tsunami warning has been issued, the Meteorological Agency says.
According to Japan's Meteorological Agency, Thursday's quake was centered off the coast of Ibaraki, about 140 miles (220 kilometers) east of Tokyo. It had a depth of 6 miles (10 kilometers), the Associated Press reported.
The agency says there is no danger of a tsunami from the quake.
On March 11, a destructive 9-magnitude earthquake and an ensuing tsunami struck Japan's northern coasts, setting off a nuclear crisis by knocking out power to cooling systems of reactors at the Fukushima plant and causing a radiation leak.
The powerful quake and the massive tsunami that followed killed about 24,000 people and ravaged the Fukushima plant. The crisis has displaced about 80,000 residents from around the plant.