Contours for 8, 4, 2, 1, 0.5, 0.25, 0.125 uSv/h based mainly on the map compiled by @nnistar http://www.nnistar.com/gmap/fukushima.html measured at 1 m above the surface. Fukushima, Tochigi, and Gunma Prefectures were polluted on 15 March 2011. This was the main pollution. Iwate and Miyagi Prefectures were on 12 March 2011. Yamagata Prefecture was on 20 March. Ibaraki and Chiba Prefectures, and al