The graphic is a representation of the increase in beta radiation in the Russian Federation in December 2011, over the amount in December 2010. The optimal quadratic discriminant function was determined using MultiODA, which is now freely downloadable at optimalprediction.com.
The radiation level in Russia should be decreasing slightly from year to year, due to radioactive decay of isotopes released from the Chernobyl disaster. Fukushima is hypothesized to increase the radiation level, so we have a situation where we are comparing radiation decrease to radiation increase. MultiODA determined the quadratic separating surface that had the highest accuracy, that is, most of the increases on one side of it, and most of the decreases on the other side. It was a good fit, with a highly significant P-value. The increase in radiation covers most of the interior of the country. The southwest corner of the country, near Chernobyl, experienced a decrease in radiation, as expected. One might think that the southeast sections of Russia would have had an increase, but this was in winter, and the prevailing winds are stronger in a west-to-east direction in that time of year, at those latitudes.
The results are consistent with a belt of higher radiation which completely encircles the northern hemisphere. I am hoping to do a more in-depth analysis, for all months post-Fuku, if I get the time to do it.