No proof. Just the source of common sense as I followed this story much longer than most(You have to go looking for such news). You do realize that radiation is still being released there? Here in the us We are being exposed to it every day. And will be for the rest of our lives. Yes it is a “Small Amount”... And the question of will it hurt us is at best unproven.
Some proof of recent criticality has even been discovered in Japan in recent days.
Could this be something else sure. But until proven otherwise then I will speculate on the most obvious.
Thanks!
Probably not Japan.
I-131 has very short half life, so for detectable levels to be noticed in Europe, much higher levels would have to existed elsewhere if it was coming all the distance/time from Japan.
Additionally, You can be sure that the US, PRC, SK and Russia are all running sniffer flights over international waters 360 degrees around Japan.