For anyone having an interest in solar activity, whether from radio ham activities or professionally as with Naytikos, there is a useful source of info here ...
http://www.solarham.net/ , one that I use regularly.
On the subject of Maunder minima and the like, there is an interesting article here ...
https://howtheatmosphereworks.wordpr...rface-climate/ if you have the patience to work through it !
Regards ... Chas