Experts Put 2026 Eclipse Aurora Odds Low, Requiring G4 or G5 Storms

Q: Will the sky during tomorrow's brief totality actually get dark enough to reveal meteors, or will civil twilight completely hide the cosmic spectacle?

Probably not during totality itself. The sky in a total solar eclipse usually drops only to about civil twilight, not full night, and tomorrow’s totality lasts barely one to two minutes. That is dim enough to reveal the corona and sometimes a few bright planets or stars, but generally not enough for the Perseids to stand out clearly. Experts discussing auroras during this eclipse make the same point: even in Greenland and Iceland, totality is expected to remain too bright for faint phenomena, with the corona likely dominating the view. Meteors face the same problem. Most Perseids are much fainter than Venus or Jupiter, so civil-twilight brightness would wash out nearly all but perhaps an exceptionally bright fireball. Location matters. In Greenland and Iceland, the eclipse happens in the afternoon or early evening, far too bright for meaningful meteor viewing during totality. In Spain, totality comes near sunset, so the sky will be darker later on, but not during the brief eclipse itself. The real Perseid opportunity begins hours afterward, once the sun is fully down and the new moon leaves the sky naturally dark. So eclipse watchers should not expect a meteor show during the eclipse. The practical advice is to treat them as two separate spectacles: enjoy totality and the corona at eclipse time, then stay out late for the Perseids, when conditions will be far better and moonlight will not interfere.

3 articles · Updated · Space.com · Aug 10

Aug. 12, 2026 totality over Greenland and Iceland could coincide with auroras, but experts say the chance is low because eclipse darkness only reaches roughly civil-twilight levels.
G4 or G5 geomagnetic storms would likely be needed to make dayside auroras bright enough to stand out, while the sun’s corona would still outshine any display near the eclipsed sun.
Pål Brekke said timing also works against viewers: totality hits in the afternoon, when observers sit under the daytime auroral oval, which expands far less than the nighttime oval during storms.
Spain’s odds are even lower, with Brekke saying auroras there would need about KP=9 conditions around 20:00 UTC and still would probably miss the strongest part of the oval.
If coronal mass ejections arrive just before the eclipse, Iceland or Greenland watchers could still get a rare triple spectacle alongside the Perseid meteor shower peak.

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