Iodine 131 detected around europe.

January 2017 detections of I-131 around europe now revealed https://nuclear-news.net/2017/02/15/iodine-131-just-reported-by-european-agency-incident-happened-in-january-2017/

Simomax, this is where a small air filter comes in handy. Spectral analysis of the filter element after a suspicious event may be revealing....
There have been a couple of problems in France recently -

http://enenews.com/massive-blast-at-nuclear-power-plant-smoke-billowed-from-building-as-explosion-led-to-massive-fire-expert-incident-very-serious-number-of-people-have-been-left-feeling-unwell

Maybe there were problems leading up to the explosion in France. But then, there are nuclear reactors all over Europe so take your pick...

Rain will wash out Radon daughter products from the air, I often see an increase with rain. But again, only a spectral signature will show you the isotope and element.

Eurdep shows a few radiation spikes over the past month, but none are at the same time to indicate a widespread release. The only related spikes I could see are 3 detectors next to Mülheim-Kärlich in Koblenz Germany which have big spikes but are separated by about a week and each at 7:00 am. That could be explained by a mobile calibration source, but if planned, why publish the spikes? [note there are 2 separate Neuweid detectors]:


For any who have not used Eurdep, to see past spikes first select a time frame of 1 month at the top right, and select View settings of external radiation, T-Gamma and Maximum value. After a Map refresh, the spikes of the past month can be seen. Click on the selected site, and adjust the time frame and dates as desired.