• Long-duration M3.9 solar flare erupts with large CME off west limb

    ByTeo Blašković

    A long-duration M3.9 solar flare erupted from a region off the NW limb at 23:02 UTC on February 24, 2025, producing a large coronal mass ejection (CME) and triggering a minor solar radiation storm. While this CME is not Earth-directed, solar wind conditions have become enhanced yesterday, and geomagnetic activity may increase in the coming days. There is a 65% chance of an M-class flare through February 27 and a 25% chance of an X-class flare.

  • X2.0 solar flare erupts from Region 3878, solar radiation storm enters 7th day

    ByTeo Blašković

    A major solar flare registered as X2.0 erupted from Active Region 3878 at 21:20 UTC on October 31, 2024. The event started at 21:12 and ended at 21:27 UTC. The flare was immediately followed by a long-duration M9.5 flare. Meanwhile, the solar radiation storm that started on October 26 entered the 7th day and continues at S1 – Minor levels.

  • X1.7 and long duration M6.6 solar flares erupt from Region 3664, solar radiation storm in progress

    ByTeo Blašković

    Active Region 3664 — the source of numerous Earth-directed coronal mass ejections (CMEs) over the past 7 days — began its transit of the western limb on May 13, 2024. The region remains very active, producing a long-duration M6.6 flare on May 13, associated with a likely Earth-directed CME, and an X1.7 at 02:09 UTC on May 14. Meanwhile, a solar radiation storm is in progress due to activity associated with the same region.

  • Solar radiation storm in progress

    ByTeo Blašković

    Proton flux started rising after 07:00 UTC on May 9, 2024, due to increased flare activity from very large and complex Active Region 3664, and reached S1 – Minor solar radiation storm threshold on May 10.