These mean looking sunspots are the cause of the strongest geomagnetic storm (G5 - Severe) in 20 years!
They are really huge, spanning about 16 Earth diameters. Auroras are happening now and probably will continue over the weekend.
Pic with a 2415mm focal length Dall-Kirkham telescope with a 2X Barlow, a Baader Astrosolar filter, and a bandpass infrared filter (850 nm).
Edited 131d ago