An earthquake with a preliminary magnitude of 5.3 jolted northeastern Japan on Sunday, the Meteorological Agency agency said. No tsunami warning was issued.
There were no immediate reports of casualties or damage from the 4:37 p.m. quake. The focus of the quake was about 20 km (12 miles) underground in the Pacific Ocean off Miyagi Prefecture, the agency said.
Tohoku Electric Power Co. reported no abnormalities at the Onagawa nuclear power plant in Miyagi Prefecture.
The quake measured 4 on the Japanese seismic intensity scale of 7 in some areas of Miyagi, including the city of Ishinomaki, and a 3 in areas including neighboring Iwate and Yamagata prefectures.