It was a co-rotating interaction region--or "CIR"--sparking bright auroras flared around the Arctic Circle.
Space Weather News for Feb. 3, 2021
https://spaceweather.com
https://www.spaceweatheralerts.com
CO-ROTATING INTERACTION REGION: Yesterday, a co-rotating interaction region (CIR) hit Earth, sparking some of the craziest-looking auroras of the current solar cycle. What *is* a co-rotating interaction region? Think of it as a mini-CME, but without an explosion on the sun. Learn more and see the photos on today's edition of Spaceweather.com.
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