Can You See Auroras Outside The Arctic?
QUICK ANSWER
Yes, auroras can appear far outside the Arctic during strong geomagnetic storms. The May 2024 G5 storm produced visible auroras as far south as Texas, Florida, Italy, and Mexico. During quiet conditions, auroras stay close to the Arctic, but solar storms can push the auroral oval much further south.
The auroral oval normally stays near the Arctic, but it expands dramatically during strong geomagnetic storms. The most powerful storms can push auroras into temperate and even subtropical latitudes, treating millions of people to displays they'd never normally see. These rare events are unforgettable but unpredictable, often visible only briefly before conditions return to normal.
How far south can they appear?
As far south as the equator during the strongest storms. According to NASA, the auroral oval expands during geomagnetic storms as Earth's magnetic field is disturbed by solar wind. During modest storms, auroras might be visible from the northern United States or Scotland. During strong storms (G3 or higher on the NOAA scale), they can reach the Mediterranean or southern US. The most extreme historical events, like the Carrington Event of 1859, produced auroras visible from the Caribbean and Hawaii.
What was the May 2024 storm?
A rare G5 (extreme) geomagnetic storm. In May 2024, a series of coronal mass ejections from the Sun produced the strongest geomagnetic storm in over 20 years. Auroras were visible from latitudes that hadn't seen them in decades, including the southern United States (Texas, Florida, Louisiana), Mexico, southern Europe (Spain, Italy), and even northern Australia. Millions of people saw the northern lights for the first time. Social media filled with photos as people who had never expected to see auroras suddenly found them overhead.
How do you know when one might happen?
Watch space weather forecasts. The NOAA Space Weather Prediction Center issues geomagnetic storm warnings on a scale from G1 (minor) to G5 (extreme). G3 storms can produce auroras visible from the northern United States. G4 storms can reach the central US and southern Europe. G5 events, very rare, can reach subtropical latitudes. Solar storms typically take 1 to 3 days to travel from the Sun to Earth, giving some warning time. Aurora forecast apps and websites track current and predicted conditions.
What should you do when one's predicted?
Find dark skies and look north. When a strong storm is forecast, get away from city lights to a location with a clear view of the northern horizon. The lights often start as a faint green or red glow low in the north. Photographs typically show more color than the eye sees, so take pictures even if you only see faint glow. Check forecasts in the hours leading up to the predicted peak. Strong storms can last from hours to a couple of days, with multiple peaks possible.
Yes, auroras can appear far outside the Arctic during strong geomagnetic storms. The May 2024 G5 storm produced visible auroras as far south as Texas, Florida, Italy, and Mexico. The Carrington Event of 1859 produced auroras even further south. Most storms are too weak to reach low latitudes, but when conditions align, millions of people in temperate regions get a chance to see the northern lights. Space weather forecasts help track these rare events.
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