File:Image-202028-galleryV9-ehmb.jpg

Map of radioactive contamination for 2011 April 7 by Der Spiegel, http://www.spiegel.de/international/world/bild-756647-202028.html

Numbers indicate the levels of radiation in microsievert/hour

At the reuse, please, attribute the article in Der Spiegel

The map indicates that the decision of the Japanese government about circular zones of the evacuation may be not best: some reasons (in particular, 30km to the North or 30km to the West from Fukushima) may be not so urgent to evacuate; while the regions to North–West from Fukushima may require the evacuation even if they are out of the 50km evacuation zone declared.

The same conclusions can be done on the aerial measurements map by the U.S. Department of Energy prepared within the plan Tomodachi of collaboration between Japan and the USA, shown at right