Solar Activity Report: September 22-28, 2025 Solar activity fluctuated between low and moderate levels throughout the week. The week began quietly, marked by low C-class flares. Activity then intensified, reaching moderate levels with several high C-class and M-class flares. By midweek, conditions briefly returned to low levels before rising again the following day and remaining moderate through the weekend. In total, 59 C-class and 8 M-class flares were recorded, with the most intense event—a p