TOKYO, July 10 (UPI) -- A strong undersea earthquake shook northeastern Japan Sunday morning, seismologists said.
The U.S. Geological Survey pegged the quake at a magnitude of 7 while Kyodo News said the Japan Meteorological Agency measured it initially at 7.1.
The Japanese news agency said a tsunami warning was issued for Iwate, Miyagi and Fukushima prefectures.
No injuries or damage had been reported as a result of the 9:57 a.m. temblor, Kyodo said.
The U.S. Geological Survey said the quake occurred off the east coast of Honshu, Japan's largest island, at a depth off 21.7 miles. It was centered 131 miles east off Sendai, 148 miles east-northeast of Iwaki, 155 miles east of Fukushima and 254 miles northeast of Tokyo, the quake-monitoring agency said.
The same region of Japan was decimated by a magnitude-9 earthquake and tsunami March 11 that killed thousands and severely damaged the nuclear power plat at Fukushima.
