A review of the records concerning solar flares would probably find out exactly what day that happened too!
That’s probably the simplest way of observing solar flare activity. If you live close to the Canadian border as I do, you can see them late August- Sept, and when there is a lot of solar flare activity, they become much more intense and colorful. At this location, they are dull normally. a silvery wave as the particles pass through. It shows how the sun’s output fluctuates quite rapidly. The last 2 years the lights have been stronger overall, indicating the sun’s output is a bit stronger.
Well, I’m 45 and have never seen an aurora here in Jersey.
You’re talking about a half century back. No small chunk of
years.(Human time that is. Geologically, 50 years is the
twinkling of an eye.)
How bright were the lights?...JJ61