My Faraday is a large galvanized garbage can too. My husband thought I was crazy when I asked for one as a Christmas present.
We'll see how crazy your husband finds you when something like this happens.
I do believe (note that I said "believe" and that I didn't say "know") that if a natural EMP occurs because of a coronal ejection, that it would be a good idea to keep electronics sequestered for a month.
If someone has diabetes and needs to test blood sugar, I imagine an entire Faraday cage room--a metal shed with a metal roof would probably work--and bring the person to this room to test sugar (or do whatever else that's urgent that involves electronics.
I say that a month is adequate time, as the Sun rotates on it's axis every 30 days or so.
By waiting a month, we will be either behind or ahead of the solar eruption.
Another good tip about a natural EMP is that it will cause exaggerated Northern Lights (Aurora borealis) and Southern Lights (Auroa austrialis).
During the Carrington Event, Northern Lights could be clearly seen and appreciated as far south as Jamaica (the Carribbean Ocean, not the one in Queens, New York).
If the Northern Lights (or, for that matter, the Southern Lights) are intensely active, it means the event is still ongoing.
However . . . just because these lights may have died down, it's still possible that the event is still in progress.
That's why I have dozens of cheap claculators in individual Faraday Cages made of bubble wrap and aluminum foil, and stored in a grounded steel box.
I plan to treat these calculators like canaries in a coal mine to test if the event is still occurring.
If the calculator gets fried when I try to use it, then I'll know that the event is still ongoing.
