According to researchers publishing in AGU Advances on September 4, 2026, a rare and massive solar storm could leave millions of people without power, with the East Coast facing widespread potential for grid failure and the U.S. economy sustaining $1.5 billion to $2 billion in losses per day. The study, led by George Mason University researchers Ed Oughton and Dennies Bor, maps out the precise vulnerabilities of the U.S. electric grid when confronted with a 1-in-150-year or 1-in-250-year geomagnetic storm comparable to the historic Carrington Event of 1859.
How Solar Storms Threaten the Modern Power Grid
When a solar storm hits Earth, it rapidly alters the planet’s magnetic field and induces strong electric currents in the ground, according to Dennies Bor. These geomagnetic disturbances force extra current through grounded high-voltage transmission lines and vital electrical equipment called transformers. As transformers attempt to maintain voltage under this unbalanced state, the grid can experience severe voltage drops. Parts of the system then automatically disconnect to prevent permanent equipment damage, triggering localized blackouts. Unlike the localized outages of the past, the modern network connects wide regions together; according to the research, a voltage issue originating in Maine could easily cascade down to Washington, D.C., if operators fail to isolate it early.
Vulnerable Regions and Economic Stakes
The newly published modeling indicates that the Northeast and the Northern Plains run the highest risk of catastrophic failure during a 250-year solar storm due to their higher latitudes and grid density. According to the study, a severe event would jeopardize power for roughly 5.1 million people and 135,000 businesses. Total economic damages would cut across multiple sectors, with finance and real estate, education and recreation, and professional services absorbing significant losses. Trade, transportation, utilities, and construction would also experience tens of millions in daily disruptions.
Pro Tip: Grid operators must manage the system when a storm arrives.
Comparing Doomsday Scenarios With Modern Grid Reality
Earlier assessments painted a far more apocalyptic picture for the nation’s infrastructure. A 2008 report by the National Academies of Sciences, Engineering, and Medicine warned that a massive solar event could trigger power disruptions lasting from four to 10 years, with first-year costs soaring between $1 trillion and $2 trillion. A separate 2013 study similarly projected multi-year outages for tens of millions of citizens.
However, industry experts dismiss those multi-year doomsday scenarios as unrealistic. Mark Olson, reliability assessment manager for the North American Electric Reliability Corporation (NERC), notes that transformers are far more resilient than past reports assumed. According to Olson, the primary danger lies in voltage instability and circuit overloads rather than permanent transformer destruction. NERC maintains recovery frameworks designed to restore baseline power within 24 hours provided physical equipment remains intact.
Lessons From the Gannon Storm
The May 2024 Gannon storm provided a severe solar storm to test our modern realm of satellites, electric grids and digital technology. While the storm was three times less intense than the Carrington Event, it produced severe downstream consequences. Farmers across at least 12 states had to halt crop planting due to precision GPS sensor failures, generating between $500 million and $1 billion in economic losses.
Yet, widespread blackouts across North America were successfully averted. Forecasters at the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center in Boulder, Colorado, led by service coordinator Shawn Dahl, provided grid operators with a critical advance warning by tracking a 124,000-mile-wide sunspot. According to Dahl, the sun is now descending from a period of heightened activity—a phase historically associated with the planet’s most destructive geomagnetic storms—meaning continuous preparation remains essential.
Did You Know? During the May 2024 Gannon storm, the resulting auroras were visible across all 50 U.S. states as well as tropical locations including India, the Bahamas, Chile, and Australia.
Frequently Asked Questions
When will the next severe solar storm hit Earth?
According to geophysicist Anna Kelbert of the Harvard-Smithsonian Center for Astrophysics, severe geomagnetic storms do not follow a fixed schedule and can occur at any time, ranging from a week to centuries into the future.
How much warning do grid operators receive before a solar storm arrives?
Thanks to advanced space weather monitoring models and early satellite detection, forecasters can now provide power grid managers with advance notice before a coronal mass ejection reaches Earth.
Which industries suffer the heaviest financial losses during a solar storm?
According to research published in AGU Advances, finance and real estate, education and recreation, and professional services bear the largest share of economic losses during a major grid failure event.
Can a solar storm completely destroy the North American power grid?
According to NERC reliability manager Mark Olson, total grid collapse and years-long blackouts are unlikely because high-voltage transformers are more resilient than older doomsday reports suggested, though systems remain vulnerable to voltage instability during 1-in-100-year events and above.
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