Actually, what knowledge I do have of sunspots was gained from obscure studies and related literature directed at revolutionaries, directing them to time their agitation to periods of high sunspot activity. It appears that social unrest correlates well with them. I found that odd and fascinating enough to pursue. Not much online that I'm aware, just scattered oblique references.
“It appears that social unrest correlates well with them. I found that odd and fascinating enough to pursue.”
I knew an old, eccentric geologist that had years ago done lots of studies in solar activity and climate and he developed cold-weather plants for crops. He also made the observation that when the solar cycle was low - the price of gold was high.
Too bad he died years ago to see his observations come through again.