Didn't think of that, as ATT, TMo, and Verizon all had a downtime spike at the same time: I chalked it up to one of the big backbone fiber companies had a blip.
Now, my specific issue has the variable of I'm in a bit of a low lying area with towers with not great line-of-sight, so probably coincidence happening at same time.
As for solar activity, did not find any report of an uptick with that yesterday. All sources reported "calm".