>https://www.zerohedge.com/technology/rare-solar-superstorm-could-prompt-internet-apocalypse-lasting-several-months-study
“Although we have sentinel spacecraft that can issue early warnings of CMEs providing at least 13 hours of lead time, our defenses against GIC are limited. Hence, we need to prepare the infrastructure for an eventual catastrophe to facilitate efficient disaster management,” Jyothi said.
Well, we have 13 hours advance notice, it appears.