This data was taken by a Global DIRT assessment team of the Fukushima I Nuclear Power Plant. Data was collected using a Berkeley Nucleonics Corporation SAM 940 Defender / Revealer. Data was collected up to within 50ft of the plant's fence. The map below represents only readings which contained isotope levels (about 2000 of the 2900+ current readings). Be sure to check back as this page will be constantly updated.