Surprise: Some Red Auroras are *not* Auroras

Posted: November 24, 2021 by oldbrew in Electro-magnetism, solar system dynamics
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Observing a recurring feature of the Earth’s ring current system.

Spaceweather.com

Nov. 22, 2021: The biggest geomagnetic storm in years erupted this month when a Cannibal CME slammed into Earth’s magnetic field. Auroras spread as far south as California and New Mexico. Upon closer inspection, however, not all of those lights were auroras. Some were “SARs.”

SARs are pure red arcs of light that ripple across the sky during strong geomagnetic storms. Here’s an example from Finland in 2018:

“The SAR was visible to the naked eye for nearly 30 minutes and, after fading a bit, remained visible to my camera for another hour and a half,” recalls photographer Matti Helin.

On Nov 4, 2021, Earth experienced a veritable SAR storm. “We photographed SARs as far south as the McDonald Observatory in Texas,” reports Jeff Baumgardner of Boston University’s Center for Space Physics. “The bands of light swept over our cameras near Boston, then headed south. We knew something special was…

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Comments
  1. Saighdear says:

    Funny how I never saw this posting on Wednesday: however strange as may be, TWICE in this past fortnight I have gone outside to feed / check the Stirks and seen a reddish glow all over the Northern half of the sky ( other half is illuminated by City lights glow ). Checking Lancaster Uni’s website – there was no Auroral activity. As I’d posted recently, are all the apparent recordings of Auroiral activity by the bbc, really current & genuine ?
    Has anyoine seen “Steve” as of recently? Last year on / around 27th Nov and 4.30pm-ish ( ie 1/2 hr after sunset) we witnessed and photographed it for some considerable time. No one else noticed ?

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