it should be added that with the obvious issues going on with the drift of the magnetic poles at what appears to be an accelerating rate - records date back to a little before the time of the Carrington Event, there is good reason to believe that just like energy level required for the sun to trigger a massive atmospheric electricity dump, is a lot lower than it was then. i'm pretty sure all things being equal that the last 4 major geomagnetic storms in the last 2 years if it weren't for all that shielding and countermeasures that we would be looking at electrical wires catching fire now every time X-ray flux passes some threshold.