Solar Storms and Flares - NASA Science

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: November 17-23, 2025 Solar activity remained at low levels throughout the reporting period, predominantly within the B-class flare range. Four high-intensity C-class flares and several weaker C-class events were observed, with the largest—a C9.9—occurring on November 19 from a region just beyond the northeast limb. No Earth-directed CMEs were detected during this interval. The latest helioseismic far-side map indicates the presence of two active regions, both with a high p

Sun news: A pair of fiery simultaneous eruptions

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