Data by NSF-NOAA GONG, operated by NSF NSO. Additional Credits: Jain/Oien/NSF/GONG/NSO/AURA, with contributions by NOAA.

No Earth-directed coronal mass ejections (CMEs) were observed. Current helioseismic far-side maps do not reveal any major active regions that are expected to emerge onto the Earth-facing hemisphere within the next few days.

During the remainder of the period, activity was marked by persistent C-class flaring, including several mid intensity C-class events. By the end of the week, most active regions had rotated into the western hemisphere, leaving the eastern hemisphere largely devoid of sunspots.

Solar Activity Report: Oct. 12 -18, 2026 Solar activity remained predominantly at low levels throughout the reporting period, except on October 16, when activity briefly reached moderate levels following an M1.3 flare from active region 14551, the largest event of the week.

Several CMEs were originated from these flares, some with Earth‑directed components. Data by NSF-NOAA GONG, operated by NSF NSO. Additional Credits: Jain/Oien/NSF/GONG/NSO/AURA, with contributions by NOAA.

All of these active regions were located in the northern hemisphere, which was more active than the southern hemisphere. The X‑ray flux remained near the B/C‑level boundary. The quietest day of the week was Oct. 11, when the flux stayed predominantly in the B‑level.

Other M‑class flares were of lower intensity: ☀️An impulsive M1.0 flare from AR 14545 on Oct. 5 ☀️ M1.4 and M1.8 flares from AR 14549 on Oct. 6 ☀️ M1.3 flare from AR 14547 on Oct. 9 ☀️ M1.2 flare from AR 14549 on Oct. 10

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 Oct. 8 from this region, followed by another high‑energy M6.4 flare on Oct. 10.

Solar Activity Report: Oct. 5-11, 2026 ☀️ Activity varied substantially, 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.

☀️ A new 3D solar eruption model wins a NASA award! 🏆 Created by @NSF @NSO, @NASAGoddard & @USNRL, “CHAR” is a revolutionary methodology enabling a new era of reliable #spaceweather forecasting. Read the full story: nso.edu/blog/nasa-award-char…

Data by NSF-NOAA GONG, operated by NSF NSO. Additional Credits: Jain/Oien/NSF/GONG/NSO/AURA, with contributions by NOAA

No Earth‑directed CMEs were observed. Current helioseismic map of the far side indicates no significant active regions poised to rotate onto the visible disk in the next few days. A few small regions, however, may turn toward Earth toward the end of the week.

A few low‑intensity C‑class flares occurred during the first two days, followed by an increase in X‑ray flux on Sep. 30 when Active Region 14535 produced the strongest event of the week: an impulsive C8.6 flare. October 2–3 were the quietest days of the period.

Solar Activity Report: Sep. 28-Oct. 4, 2026 ☀️As solar cycle continues its declining phase, magnetic activity has decreased significantly. Solar activity remained at very‑low to low levels throughout the reporting period.

Two papers from the @NSF NSO engineering team detail vital updates to the NSF Inouye Solar Telescope’s cooling systems. Smart automation upgrades across 7 miles of piping ensure the observatory runs efficiently and sustainably ☀️🛠️ nso.edu/blog/taming-the-sun-…

The most recent helioseismic map of the far side shows no evidence of significant active regions that are likely to rotate onto the Earth‑facing hemisphere over the next few days.

Data by NSF-NOAA GONG, operated by NSF NSO. Additional Credits: Jain/Oien/NSF/GONG/NSO/AURA, with contributions by NOAA

The strongest flare was an impulsive C3.1 event on September 26 from active region 14534. No Earth‑directed CMEs were identified in available coronagraph imagery.

Several active regions were present on the visible disk, but most remained relatively quiet, producing little to no significant flaring activity aside from occasional low‑intensity C‑class events.

Solar Activity Report: September 21-27, 2026 Solar activity remained at low levels during the reporting period, with X‑ray flux generally at mid‑B levels except for a few impulsive low C‑class flares.