An earthquake with a preliminary 5.8-magnitude jolted northeastern Japan on Saturday morning, the weather agency said. No tsunami warning was issued.

East Japan Railway Co. temporarily suspended services of the Tohoku Shinkansen Line between Sendai and Morioka stations following the 6:43 a.m. quake, while utility firms said no abnormalities were found in nuclear power plants in the area.

The jolt measured 4 on the Japanese seismic intensity scale of 7 in wide areas of Miyagi Prefecture and parts of Iwate Prefecture, the Japan Meteorological Agency said.

The focus of the quake was about 60 km (37 miles) underground in the Pacific Ocean off Miyagi Prefecture, the agency said.