#OnThisDay in 2011, a magnitude 9.0 earthquake trigged a tsunami off the coast of Japan and killed 16,000 people. The damage cut power to the Fukushima Daiichi nuclear power and caused 3 of its reactors to meltdown. No deaths have been attributed to radiation exposure. The accident led to new safety procedures at U.S. nuclear power plants. | U.S. Department of Energy Office of Nuclear Energy