Solar radiation storm in progress
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.
Major X3.9 solar flare erupts from AR 3664 — the 10th X-class flare in just 7 days
A powerful solar flare measuring X3.9 erupted from Active Region 3664 at 06:54 UTC on May 10, 2024. The event started at 06:27 and ended at 07:06 UTC. This is now the 10th X-class solar flare since May 3.
G4 – Severe or greater geomagnetic storm forecast as multiple CMEs merge and impact Earth on May 11
Multiple coronal mass ejections (CMEs) — of which at least 4 halo CMEs produced by Active Region 3664 over the past few days — will hit Earth, starting late May 10 into May 11, 2024.
At least 5 CMEs heading toward Earth, G4 – Severe or Greater Geomagnetic Storm Watch in effect for May 11
At least five coronal mass ejections (CMEs) produced over the past 3 days are heading toward Earth. The first impact is expected on May 9 and the following over the next 3 – 4 days.
Long-duration X1.0 solar flare erupts from geoeffective Region 3664, CME impact expected on May 11
A major solar flare measuring X1.0 erupted from Active Region 3664 at 05:09 UTC on May 8, 2024. The event started at 04:37 and ended at 05:32 UTC. Preliminary modeling efforts showed CME arrival time early on May 11. This is the second X-class solar flare of the day, following another X1.0 at 01:41 UTC.
Major X4.5 solar flare erupts from Region 3663 — fourth X-class flare in 3 days
A powerful, long-duration solar flare measuring X4.5 erupted from Active Region 3663 at 06:35 UTC on May 6, 2024. The event started at 05:38 and ended at 06:47 UTC.
Major X1.2 solar flare erupts from Region 3663 — second X-class flare of the day
A major solar flare measuring X1.2 erupted from Active Region 3663 (beta-gamma-delta) at 11:54 UTC on May 5, 2024. The event started at 11:41 and ended at 12:16 UTC. This is the second X-class solar flare of the day and the third from Region 3663 since X1.6 on May 3.
Major X1.3 solar flare erupts from Region 3663
A major solar flare measuring X1.3 erupted from Active Region 3663 at 06:01 UTC on May 5, 2024. The event started at 05:47 and ended at 06:09 UTC. This is the second X-class solar flare from this region since X1.6 at 02:22 UTC on May 3.
M9.1 solar flare erupts from geoeffective Region 3663
A very strong solar flare measuring M9.1 erupted from Active Region 3663 at 06:19 UTC on May 4, 2024. The event started at 06:02 and ended at 06:30 UTC. This is the 6th and the strongest M-class solar flare since X1.6 on May 3.
X1.6 solar flare erupts from Region 3663, forecast calls for CME impact late May 5
A major solar flare measuring X1.6 erupted from Active Region 3663 (beta-delta) at 02:22 UTC on May 3, 2024. The event started at 02:11 and ended at 02:27 UTC. A G1 – Minor geomagnetic storm is in effect for May 5 and a G2 – Moderate for May 6 (UTC day) due to the potential arrival of a CME produced by this flare.
