I see a huge jump between the 17th and 18th but I have no idea what that means. Can someone please explain? Or is the jump minor, and the axis is to blame for the seemingly large change?
Without any context or explanation, the link isn't really useful nor interesting. Is a daily average change of roughly 0.5 uR/h meaningful? We can see from the hourly chart above that short-term fluctuations can be between roughly 0 and 20 uR/h, what is a meaningful change? It's currently very unclear what the linker is trying to say with sharing the link and why it was shared to begin with.
Would downvote if I could, anything below 10 uR/h is background radiation. Sniffles posted a link to a rad monitoring device doing it's thing, and not showing anything out of the ordinary.
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[ 3.6 ms ] story [ 56.5 ms ] threadSilicon Valley is far from "Europe" though...
http://www.irsn.fr/EN/newsroom/News/Pages/20170213_Detection...
San Francisco: https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca
The levels looks normal to me.