Solar Activity Report: October 5 - 11, 2026

 Solar activity varied substantially during the reporting period, rising from low to high and then returning to low levels. Such variability is typical of the declining phase of the solar cycle, when sudden bursts of enhanced activity are common. Approximately 50 C‑class and 7 M‑class flares were observed, with most originating from active region 14549. The strongest event was an M6.7 flare on October 8 from this region, followed by another high‑energy M6.4 flare on October 10.

Other M‑class flares were of lower intensity: an impulsive M1.0 flare from active region 14545 on October 5; M1.4 and M1.8 flares from active region 14549 on October 6; an M1.3 flare from active region 14547 on October 9; and an M1.2 flare from active region 14549 on October 10. All of these active regions were located in the northern hemisphere, which was more active than the southern hemisphere during this period. The X‑ray flux remained near the B/C‑level boundary. The quietest day of the week was October 11, when the flux stayed predominantly in the B‑level. Several CMEs were originated from these flares, some with Earth‑directed components.