The cooling system of the third reactor at the Fukushima nuclear power plant has stopped circulating water following a powerful 7.3 offshore earthquake. TEPCO said it managed to restart the system some 90 minutes after the failure.
A magnitude 7.4 earthquake struck early on Tuesday local time off the Japanese coast about 70km northeast of Iwaki, Fukushima.
7.4 magnitude earthquake strikes northern Japan Tsunamis of up to 90 centimeters recorded 1.4 metre tsunami hits Sendai 1 metre tsunami at Fukushima nuclear plant
A powerful earthquake, with a preliminary magnitude of M7.3 on the Richter scale, since reduced to M6.9 by the USGS, struck Japan 156 miles northeast of Tokyo at 5:59am local time.