NHK: Fukushima radiation still circling globe — Levels consistently rise and fall in 40-day cycle (VIDEO)
May 28th, 2012
Radioactive materials spread from Fukushima plant
May 28, 2012
Japanese scientists say radioactive substances from the Fukushima Daiichi nuclear power plant may have been dispersed all around the globe in about 40 days.
A research team led by Akira Watanabe, a Fukushima University professor and meteorologist […] say the overall density is declining, but continues to rise and fall alternately in a 40-day cycle.
They say radioactive materials from the Fukushima plant fell to the ground in various parts of the world, carried by atmospheric air flows, and then gradually decreased.