A Mega Solar Storm Could Knock Out US Power: Here's Who's at Risk

New research maps how a Carrington-scale geomagnetic storm could disrupt North American power grids, with the Northeast and Northern Plains most at risk and daily economic losses around $1.5–$2 billion; outages could last from hours to weeks, though forewarnings and grid hardening—illustrated by the May 2024 Gannon storm—could help mitigate impacts.