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Mapping radiation in Japan

 "On March 15, the radioactive cloud from Fukushima reactor was transported inland, hitting the CTBTO station in Takasaki." --From the report, "Accident in the
Mapping radiation in Japan
Mapping radiation in Japan

[Source: Energy.gov]

UPDATED 3/26: The above map is the one Professor Van Hippel was referring to that Rachel said we'd put on the blog. Below, a wider view of the effect of wind patterns on radiation dispersal.

Mapping radiation in Japan
Mapping radiation in Japan

 "On March 15, the radioactive cloud from Fukushima reactor was transported inland, hitting the CTBTO station in Takasaki." --From the report, "Accident in the Japanese NPP Fukushima: Large emissions of Cesium-137 and Iodine- 131/Spread of Radioactivity/ weather currently favourable/low level radioactivity observed in Iceland (Update: 24 March 2011 16:00)" (pdf)

ADDING: Here's an animated version of this map:

Find an up-to-date version at the bottom of the page here.