Fig. 4
From: Secondary wind transport of radioactive materials after the Fukushima accident
Ratio of radioiodine (131I) contamination to the radiocesium (summation of 134Cs and 137Cs) contamination in soil at different locations in Fukushima prefecture. The code numbers of the sampling places are the same as the original data (contamination level in the soil) that is published by MEXT (MEXT, 2011). Directions and distances from the FNPP (S: south, W: west, N: north) are given in the legend. Approximate linear fitting is made region by region, except for anomaly points.