Cannibal CME Sparks Low Latitude Auroras

Spaceweather.com

Nov. 4, 2021: Auroras in California? Believe it. On Nov. 4th, the glow of a strong (G3) geomagnetic storm spread almost to Los Angeles. Aurora chaser Hongming Zheng took this picture just outside Lincoln CA at latitude +39N:

“This was my southernmost aurora sighting yet!” says Zheng. “A red glow and occasional pillars were visible to the naked eye. I was very pleasantly surprised with this unexpectedly strong geomagnetic storm.”

More reds appeared in Joshua Tree, California (+34N). “I could not see them with my naked eye,” says veteran observer Don Davis, “but my camera recorded these rare SoCal auroras.”

The CME that sparked the display was a special “Cannibal CME“–that is, a mashup of multiple solar storm clouds striking Earth all at once. Cannibal CMEs contain tangled magnetic fields and compressed plasmas that often do a good job sparking auroras.

At the apex of…

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November 6, 2021 at 08:57AM

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