There have been no reports of casualties or damage caused by the quake.
According to the National Meteorological Agency of Japan, there was no tsunami threat.
The epicenter was located in the Pacific Ocean off the coast of Miyagi Prefecture, and the center lies at a depth of 10 kilometers under the seabed.
Tremors were felt by the residents of eight Japanese prefectures, including Fukushima, where the nuclear power plant accident of the same name occurred.
 Operations at the nuclear power plant were not affected by the quake