At 2:46 p.m. on March 11, 2011, a 9-magnitude megathrust earthquake triggered a tsunami that slammed into the aging Fukushima No. 1 nuclear power plant along the country¡¯s northeastern coastline, less than 250 km north of the capital. In the worst nuclear accident since Chernobyl, the plant¡¯s power systems failed, causing cooling units to shut down and sending reactor cores into meltdown.

Fukushima: The Story of a Nuclear Disaster, by David Lochbaum, Edwin Lyman, Susan Q. Stranahan and The Union of Concerned Scientists