Finland, Sweden and Norway have noted in recent days of low levels of unusual radioactivity of human origin, an increase harmless to the man who, according to a Dutch institute finds its source in, or to the west of Russia.

The Organization of the treaty of complete prohibition of nuclear tests, the stations also allow you to measure increases of radioactivity of civil origin, has released a map on Twitter showing the area of the probable origin of the source, according to its measures.