I wonder if anyone realises that any damage from a large CME (coronal mass ejection) can be totally eliminated by simply turning everything OFF.
That's right. Except while turning everything OFF isn't exactly a trivial undertaking, believe me it will be a whole lot easier than the 5-10 years of misery that will follow a large CME targeted at the Earth if we don't.
Everything from the entire electrical grid to your car battery will have to be disconnected in order to avoid damage. All circuit breakers would have to opened, everywhere.
These mass ejections usually take 2-3 days to reach the earth so there would be sufficient warning. The power grid would only have to be down for the duration of the CME's impact on the earth, probably only 24 hours.
Some power would have to be left on and the damage as a result "absorbed". I'm thinking nuclear power plants for example that would need continuous cooling.
It would have to be done, because a CME of sufficient power has the potential to wipeout EVERY SINGLE pole line transformer in the WORLD. And replacement of all those transformers would take years, if not decades to complete, during which you would NOT have any electrical power at all.
A program needs to be put into place to facilitate this shutdown before it is too late.