From what I understand, there is widespread agreement on a grid-wide disconnect policy. The idea is: when a CME of sufficient scale is detected, all switchyards

From what I understand, there is widespread agreement on a grid-wide disconnect policy. The idea is: when a CME of sufficient scale is detected, all switchyards and substations go open a bit before impact (CME ions travel sub-c, so we have between 6 and 10 hours notice). There is a 2-3 hour worldwide blackout, after which we close circuits again. There are several unsolved problems, such as, how do we dump surplus generation, particularly from nuclear reactors (you can SCRAM a reactor instantly, but you're not bringing it back up anytime soon), while retaining the ability to spin back up quickly? In what order do we disconnect and reconnect? Etc As for satellites, I'm not sure. You need long antennas to induce the currents needed to destroy things, which is why the grid is far more vulnerable than, say, cars (contrary to the "cars don't run" narrative of prepper fiction) Maybe they get through just fine, maybe we lose and have to relaunch a lot of orbital assets? Not sure on this one.