Image from:-The Japan Meteorological Agency (JMA) put the quake at a magnitude of 6.1. (Representational)
The earthquake's epicenter was 41.7 kilometers (26 miles) beneath the Pacific Seabed, less than 50 kilometers off the Miyagi prefecture's coast, the USGS said on its website, rating the risk of injury and damage as low.
The Japan Meteorological Agency (JMA) has placed the quake at a magnitude of 6.1 and a depth of 50 km. Japan's Kyodo News Agency reported that after the tremor that hit just after 5.30 am (2030 GMT) no tsunami warning had been issued.
Japan sits on the "Ring of Fire" of the Pacific, an arc of intense seismic activity that extends across Southeast Asia and the Pacific Basin.
A devastating 9.0-magnitude earthquake struck about 130 kilometers east of the prefecture of Miyagi in 2011, unleashing a huge tsunami, triggering the meltdown of the Fukushima nuclear reactor and killing nearly 16,000 people.