Maybe of interest in this thread, there is some current regulation in the U.S. for handling GMDs that might be induced by a CME, called TPL-007. Power operators have to start collecting data, like magnetic field data, to plan and understand how GICs may affect their grid. The hope is that in the event of another major event like Carrington, power operators would be given enough time to react before damage is done, and avoid the largest consequences.

Disclosure: I work for one of the major providers for GMD/GIC solutions: Computational Physics, Inc.