Solar Storms and Flares - NASA Science

Solar Activity Report: January 26 - February 1, 2026 Solar activity over the past week ranged from low to very high levels. The week began with relatively low activity, highlighted by two strong C-class flares on January 26: a C8.8 flare from active region 14355 and a C5.0 flare from active region 14351. Activity then tapered off, with only a few minor C-class flares observed through January 30. On January 31, activity intensified again as active region 14366 produced multiple high-level C-class

Solar Activity Report: December 22-28, 2025 Solar activity was low at the start of the week, with X‑ray flux generally confined to the low C‑class range aside from a few higher C‑class events. Activity increased markedly on December 27, highlighted by an M5.1 flare from active region 14325 at the east limb and a C9.9 flare from active region 14318 near the disk center. M‑class activity continued into December 28, when active region 14325 produced an impulsive M1.3 flare and active region 14317 g

Solar Activity Report: October 20-26, 2025 ☀️ Solar activity declined from moderate to low levels over the past week. Only one M-class flare (M1.1) occurred early in the week. There were several C-class flares from multiple active regions throughout the week. Notably, Region 14262 produced two long-duration C-class flares (C4.7 and C2.7) on October 22. The most intense activity originated from the far hemisphere, where Region 14246 generated two coronal mass ejections (CMEs) on October 21. This

How NASA Tracked the Most Intense Solar Storm in Decades - NASA Science