National Solar Observatory

☀️ Ka Lā | The Sun, the Earth and Us 🌍 We’re proud to share a new @NSF documentary filmed on Haleakalā, Maui! Discover our timeless connection to the Sun and the groundbreaking science at the NSF Inouye Solar Telescope🎬: youtu.be/FKzly6fIGsM #NSFfunded #InouyeSolarTelescope

The latest helioseismic far‑side map suggests that a moderate to strong active region may rotate onto the north‑east limb around May 9. Data by NSF-NOAA GONG, operated by NSF NSO. Credits: Jain/Oien/NSF/GONG/NSO/AURA with contributions by NOAA. #NSFfunded #spaceweather

Consequently, Apr. 28 was the most active day of the week, and the strongest event was an M1.5 flare from active region 11420. This region also produced a C7.4 flare on May 1 and a C8.7 flare on May 2. No significant Earth‑directed CMEs were detected in coronagraph observations.

Solar Activity Report: Apr. 27-May 3, 2026 Solar activity during the reporting week remained generally low, with X‑ray flux staying within the low C‑class range aside from a few high‑C and low M‑class events.

As the @NSF flagship ground-based solar observatory—operating the NSF Inouye Solar Telescope and NSF-NOAA GONG—we provide the critical data the scientific and space weather forecasting communities need to predict solar storms. Learn about space weather research below!

What if solar flares could tell us their secrets? ☀️Intricate, evolving patterns seen in solar flare ribbons provide a new way to probe hidden processes driving energy release in the Sun’s upper atmosphere. New study, led by @NSF @NatSolarObs scientists: nso.edu/blog/reading-t…

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

Conditions subsided on Apr. 25, although the X‑ray flux remained in the C‑class range with a few M‑class events. These flares were associated with CMEs, none of which had Earth‑directed components.

Solar Activity Report: April 20-26, 2026 ☀️ Activity ranged from very low to high levels during the period. The week began with very low activity, with X‑ray flux in the mid‑B range, before increasing to the upper B‑class level accompanied by frequent low‑ to mid‑C‑class flares.

Mapping the Sun’s hidden far side! ☀️A team of scientists led by @NSF @NatSolarObs developed a new method using helioseismic data to decode the magnetic polarities of unseen sunspots, paving the way for better space weather warnings for Earth. Read more: nso.edu/press-release/…

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

Additional low‑level C‑class flares were observed on April 13, 16, 17, and 18, while the remainder of the week stayed within the B‑class range. A few CMEs were detected, none with Earth‑directed components.

Solar Activity Report: April 13 - 19, 2026 Solar activity remained at low levels during the reporting period. X‑ray flux was predominantly within the B‑class range, with only occasional short‑lived increases into the C‑class. 🧵

Just Published! ☀️ “Three Decades of Global Oscillation Network Group: From Helioseismology to Magnetic Field and Space Weather.” Since 1995, NSF-NOAA GONG has transformed our knowledge of the Sun's internal dynamics, magnetic fields & space weather: link.springer.com/article/10.100…

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

Helioseismic maps of the far side show several active regions currently present. One of them—an active region from the previous rotation—appears to have a high likelihood of returning to the visible hemisphere around Apr. 11.

Solar Activity Report: Mar. 30 - Apr. 5, 2026 ☀️ Activity fluctuated sharply over the week, starting at high levels on Mar. 30 with a long‑duration X1.4 flare from active region 14405, located in the SE quadrant of the visible disk. 🧵👇