A strong earthquake with a preliminary magnitude of 7.1 jolted northeastern Japan Sunday morning, the Japan Meteorological Agency said.
A tsunami warning was issued for Iwate, Miyagi and Fukushima prefectures.
There were no immediate reports of injuries or damage from the 9:57 a.m. quake, which registered 4 on the Japanese seismic intensity scale of 7 in inland areas of northern Iwate Prefecture, across Miyagi Prefecture and parts of Fukushima Prefecture.
This still image taken from NHK footage shows the geographic location of the epicenter of the earthquake that happened near east coast of Japan, July 10, 2011. A 7.1-magnitude earthquake struck the eastern Japan coast at 9:57 a.m. (0057 GMT) local time Sunday, prompting the authorities to issue a tsunami warning for the northeastern coast. [Xinhua]
The quake measured 3 on the Japanese scale in other parts of the prefectures as well as some parts of Aomori, Akita and Yamagata prefectures, according to the agency.
No abnormalities were reported by Tokyo Electric Power Co. at the Fukushima Daiichi and Daini nuclear power plants following the quake.
The focus of the quake was off the coast of Miyagi Prefecture at a depth of about 10 kilometers, the agency said.