Solar Storms and Flares - NASA Science

Solar Activity Report: October 13-19, 2025 Solar activity persisted at moderate levels throughout the week, with M-class flares occurring daily. Active Region 14246 was the dominant source, contributing 25 of the 28 M-class flares recorded during the reporting period. The most intense event was an M4.8 flare on October 15. Notably, even after crossing the west limb on October 18, the region continued to produce M-class activity, including M1.0 and M1.8 flares on October 19. There were numerous C