The EM disturbance to Earth (Dst) of Carrington was -1000, whereas this one was -250. But the flare that produced Carrington was estimated to be an X80, whereas our max was around an X3.98. I think that means that Carrington produced around 0.008 W/m^2 of X-ray flux whereas ours produced around 0.0004
The non-linear effect (20x weaker flare only 4x less effect) is accounted for by how Earth's magnetic field has weakened in the ~165 years since Carrington.
That’s what I want to know but everybody just talks about how pretty it is. I want to know if it was dangerous to our electronics, and if not then how close it came to being dangerous, you know, small things like that.
By the time you cannot use Internet, it’s too late—and it won’t be all over the news because guess how we make/broadcast/receive them. Worst case you won’t even get a radio transmission through.