SUNSET: 
0
Photographer:
Jon Greif
Location of Photo:
Alpine, CA, USA
Date/Time of photo:
December 4, 2025, at 12:00 noon PST
Equipment:
50 mm Lunt Hydrogen alpha refractor, ZWO ASI 178MM camera, ASI Studio capture software and Pixinsight Solar Tools processing software on an M1 MacBook Pro.
Description:
The sun has been very active in the last 24 hours with no fewer than 96 visible sun spots in various regions (labelled in the photo). A large (M6.0) flare from region AR4300 triggered an R2 (moderate) radio blackout across the sunlit side of the Earth at 02:50 UTC (6:50 pm last evening, PST). A large flare (arrow) can be seen in this image, shot from our backyard this noon.
