After a devastating 8.9 earthquake, damage to the Fukushima Nuclear Power Plant led to some sort of explosion.

The extent of the damage and severity of the explosion is not yet known, but early reports are saying that the containment unit was not damaged. The evacuation radius has been increased to 20km.

The explosion at Japan’s Fukushima nuclear plant was not caused by the nuclear reactor but by “water vapor that was part of the cooling process,” Chief Cabinet Secretary Yukio Edano said Saturday. He said no harmful gases had been emitted by the explosion.

Detail are still coming in and I’ll update the post as they do.