A strong geomagnetic storm is expected to occur on Wednesday, which could mean good news for stargazers around the country.
This chance of a severe geomagnetic storm will increase the odds for Americans as far south as Alabama to see the Northern Lights in the coming days.
A large coronal mass ejection (CME), a massive eruption of plasma from the Sun’s corona, is expected to arrive at Earth by midday Wednesday and last into the evening.
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This sequence of events could trigger a geomagnetic storm, prompting officials to issue a G4 Geomagnetic Storm Watch.
FILE: A view of the Northern lights from the New York National Weather Service Office taken on Oct. 10, 2024 during a severe (G4) geomagnetic storm.
Solar storms are ranked on a scale from G1 to G5, from minor to extreme characterization. According to the National Oceanic and Atmospheric Administration (NOAA), a G4 category storm is characterized as severe, which could cause widespread voltage control issues for various regions.
Storms of this magnitude can disrupt critical infrastructure, including cellular networks and radio communications.
Northern Lights shine over Hansville, Washington on Sept. 16, 2025.
(Greg Johnson / SkunkBayWeather.com / FOX Weather)
According to the NOAA, a geomagnetic storm is a significant disturbance of Earth’s magnetosphere that occurs when energy from the solar wind is exchanged into the space environment surrounding Earth.
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Due to this astronomical event, the northern lights may become visible across much of the north half of the lower 48, according to the FOX Forecast Center.
People in states as far south as Alabama and as far north as Northern California could have a chance to view the breathtaking light show.
