
The earthquake triggered a powerful tsunami, with 13- to 14-meter-high waves damaging the nuclear power plant's emergency diesel generators, leading to a loss of electric power. The proximate cause of the disaster was the Tōhoku earthquake and tsunami, which remains the most powerful earthquake ever recorded in Japan.

On 11 March 2011, a nuclear accident occurred at the Fukushima Daiichi Nuclear Power Plant in Ōkuma, Fukushima, Japan. ġ6 with physical injuries due to hydrogen explosions, Ģ workers taken to hospital with possible radiation burns

ģ7☂5′17″N 141☁′57″E / 37.42139°N 141.03250☎ / 37.42139 141.03250ġ confirmed cancer death attributed to radiation exposure by the government for the purpose of compensation following opinions from a panel of radiologists and other experts. Water vapour/"steam" venting prevented a similar explosion in Unit 2. Hydrogen-air explosions in Units 1, 3, and 4 caused structural damage. The four damaged reactor buildings (from left: Units 4, 3, 2, and 1) on 16 March 2011.
