“The exercise was held from May 8 to 9, 2024, at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, and at a Federal Emergency Management Agency (FEMA) site in Denver, Colorado.”
Article refers to a PDF of the report it’s based on:
https://www.jhuapl.edu/sites/default/files/2025-04/Space-Weather-TTX-Report-Summary-v3-FINAL.pdf
I don’t think it will matter. We need modern logistics to produce and get food to people. Without that 90% of people will starve in the first few months.
It’s good to have supplies for regional disasters and events that only last a few weeks or months. But if the national grid is going to be out for a year or more and things like fuel and food can’t be transported and stored at key locations then it’s all going to shit.
A hundred years ago most food was grown a days walk away from a person. With no Diesel production or distribution, which some flairs knock out, there is no warehouse refrigeration.
Even with reserves, there are spare parts drying up. Trucks, ships and planes need constant work.
Some areas would get by, grains and beans can be moved without all that. Probably a huge percentage would survive. Barely