Yes, geomagnetic-storms. Most of the mitigation efforts for solar flares also are effective for E-3 EMP on earth by decoupling/reducing DC/VLF current paths on long AC transmission lines to stop transformer saturation from the high currents and their destruction from Joule heating.Hi,
This is starting to sound like "Disaster Movie" which was funny as all heck.
Did anyone mention solar flares yet?
https://www.ferc.gov/industries/electric/indus-act/reliability/cybersecurity/ferc_meta-r-322.pdf