On March 11th, 2011, the Fukushima Daiichi Nuclear power plant was hit by natural forces that were beyond its capability to withstand. It all started with the Tōhoku earthquake, approximately 70 kilometers east of the Oshinka Peninsula. This was the most powerful earthquake in the history of Japan and the fourth most powerful on record, measuring 9.1 on the Richter scale.
This earthquake was so powerful that it moved the Japanese island of Honshu 2.4 meters to the East, shifted the Earth’s axis between 10 and 25 cm, increased the earth’s rotational speed slightly and created a tsunami with waves as tall as 40.5 meter (133 feet) that struck eastern Japan.
Looking at it dispassionately, it’s not surprising that the earthquake damaged the nuclear power plant. But that would have been a survivable accident, were it not for the other effects of the earthquake and resulting tsunami. Recognizing the danger, systems in the active reactors immediately shut down form the earthquake, a pre-programmed response to protect the people of Japan. But nuclear reactors generate an enormous amount of heat, and the tsunami disabled the generators which should have provided power to the pumps necessary to cool the reactors.
Without those pumps
Originally posted on Ask A Prepper