A strong solar flare measuring M5.8 erupted from Active Region 4475 located at the west limb at 12:57 UTC on June 30, 2026. The event started at 12:37 and ended at 13:23 UTC.
High-energy solar protons briefly reached S1 – Minor solar radiation storm levels on May 26, 2026, following a large partial halo coronal mass ejection (CME) from the far side of the Sun. The eruption was first detected by the GOES-19 CCOR-1 coronagraph at 22:00 UTC on May 25. Forecast calls for a 10% chance of another S1 or stronger solar radiation storm on May 27.
A G4 – Severe solar radiation storm is in progress after ≥10 MeV proton flux exceeded 10 000 pfu at 18:10 UTC on January 19, 2026, following the X1.9 solar flare on January 18. As the associated full-halo coronal mass ejection approaches Earth, forecasters warn that a G4 – Severe geomagnetic storm is likely early on January 20.
A strong solar radiation storm (S3) is in progress after ≥10 MeV proton flux exceeded 1 000 pfu at 10:20 UTC on January 19, 2026. The event follows an X1.9 solar flare and full-halo coronal mass ejection that erupted on January 18. S3 – Strong solar radiation storms are relatively rare, occurring just a few times in one 11-year solar cycle.
Following an X1.9 flare and associated full-halo coronal mass ejection (CME) late on January 18, 2026, the ≥10 MeV proton flux rose above 100 pfu early on January 19. The event reached S2 – Moderate solar radiation storm levels, prompting extended warnings for continued elevated radiation conditions through the rest of the day.
A major long-duration solar flare measuring X4.0 erupted from Active Region 4274 at 08:30 UTC on November 14, 2025, producing a fast CME. The event started at 07:44 and ended at 08:40 UTC.
Proton flux rose sharply following X1.2 solar flare at 07:19 UTC on November 10, 2025, reaching S1 – Minor Solar Radiation Storm levels at 11:20 UTC.
An S1 – Minor solar radiation storm began at 17:00 UTC on May 31, 2025. The storm is linked to a long-duration M8.1 solar flare from Active Region 4100 at 00:05 UTC on May 31. Minor HF radio signal fades are being reported at high latitudes.
A strong M5.6 solar flare erupted from Active Region 4046 at 07:55 UTC on April 1, 2025, producing a 10cm radio burst but showing no signs of an associated coronal mass ejection (CME). Meanwhile, a solar radiation storm triggered by the X1.1 flare on March 28 reached the S2 – Moderate threshold at 02:05 UTC today.
Minor solar radiation storm conditions were registered on March 31, 2025, after an X1.1 solar flare erupted from the Sun’s east limb on March 28.
