Last night’s G4 geomagnetic storm produced the best and most intense auroral displays since May.
By Astronomy Staff |
Published: October 11, 2024 | Last updated on February 27, 2026
Aurorae dance above Lake Huron as seen from Collingwood, Ontario, Canada. Credit: Tania Wood
Solar cycle 25 continues to deliver, with flares and coronal mass ejections delivering repeated auroral storms visible at latitudes much lower than normal. Last night’s geomagnetic storm reached G4 levels — the strongest since the historic G5 storm of May 10/11.
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Many were able to see a coronal aurora, which occurs when the auroral oval lies directly overhead, and the light generated by the infalling particles appears to spread outward across the sky in a halo. Credit: Tania WoodThe aurora borealis shimmers in the sky and on the waters of the Clarence J. Brown Reservoir in Buck Creek State Park in Ohio. Time: 10:04 p.m. CDT. Canon 90D, 16mm f/2.8 lens at f/3.5, ISO1600. Credit: Jeremy NickosonThe aurora dances above the Cap-Rouge trestle bridge in Quebec City the night of Oct. 10/11.
Location: Mammoth Lakes Area in California. Credit: Jeff FoxShot on iPhone 15 Pro. Credit: Jared BowensShot on iPhone 13. Location: Waukesha, Wisconsin. Credit: Alison KlesmanA pillar erupts in this shot taken from Nashotah Park in Waukesha, Wisconsin. Credit: Mark Zastrow
