Today was a rare day for solar activity. This year, the sun has been at the peak of its 11-year sunspot cycle. Today, there were no active regions at all! Not one sunspot. Below, today’s H-alpha image shows a few filaments (dark lines on the solar disk that represent prominences en face) and complex prominences along the sun’s NW, SW, SE, and NE limbs.
And here ius the spotless broader band image.
The galleries below showcase today’s solar limb prominences.
