> Estimates of the storm strength (Dst) range from −0.80 to −1.75 µT.
So.. less than Earth's ambient magnetic field?
While low power, long distance lines (like telegraph or POTS) would be in trouble, and maaaybe some network cards would burn our due to long Ethernet wires, storage devices and many computers would be fine. If you are super worried, seal some hard drives in food tins - the frequency is pretty low so it doesn't even have to be fully airtight.
No, the GP got it right. High-frequency = short wavelengths, which can squeeze through small gaps in metal more easily than long wavelengths. (Visible light is an extreme example of this.)
Right, I wasn't thinking about it this way, and I probably wouldn't for the purpose of blocking EM. In principle, low frequency penetrates better but as you say high frequency can get into things more (but doesn't necessarily).
Of course I didn't actually look up what frequencies we're talking about- low and high can mean a lot of different things
So.. less than Earth's ambient magnetic field?
While low power, long distance lines (like telegraph or POTS) would be in trouble, and maaaybe some network cards would burn our due to long Ethernet wires, storage devices and many computers would be fine. If you are super worried, seal some hard drives in food tins - the frequency is pretty low so it doesn't even have to be fully airtight.