An earthquake with preliminary magnitude of 6.9 has struck off the coast of Fukushima prefecture in Japan. A tsunami warning for waves of up to three meters (10 feet) has been issued.
The Japan Meteorological Agency says the quake struck around 6 a.m at a depth of 10 kilometers (6 miles).
There was an initial report that the magnitude of the quake was 7.3, but the United States Geological Survey is saying that magnitude is closer to 6.9.
Fukushima prefecture is north of Tokyo and home to the nuclear power plant that was destroyed by a huge tsunami following an offshore earthquake in 2011.
