Region 4232 produced two CME-associated M-class flares on September 28 and 29, 2025 — an M6.4 at 08:43 UTC on September 28 and an M3.6 at 01:45 UTC today. Forecast calls for unsettled to isolated G1 – Minor geomagnetic storm conditions on September 29, with mostly quiet levels returning by October 1.
A large filament eruption was observed at 19:45 UTC on September 4, 2025, followed by at least three CMEs. Model runs suggest a likely arrival early on September 7. In addition, a recurrent positive polarity coronal hole high-speed stream (CH HSS) activity is expected to enhance solar wind parameters beginning early September 6, with G1 – Minor to G2 – Moderate geomagnetic storm conditions likely through September 8.
A long-duration solar flare measuring M2.7 at its peak erupted at 20:02 UTC on August 30, 2025. The eruption produced an asymmetric full halo coronal mass ejection (CME), with impact expected late September 1 into September 2. A G3 – Strong geomagnetic storm watch is in effect.
A moderately strong M4.4 solar flare erupted from Active Region 4168 at 15:53 UTC on August 5, 2025, producing a coronal mass ejection (CME). Initial modeling indicates most of the material was directed ahead of Earth’s orbit, with a glancing blow or shock arrival possible by late August 8.
A faint partial halo coronal mass ejection (CME), associated with a filament eruption near N07W12 at approximately 05:00 UTC on July 23, 2025 is forecast to arrive at Earth around midday UTC on July 27.
After 18 days with no notable flaring, our star unleashed an M2.4 solar flare from an emerging region on the northeast limb. The flare began at 03:42, peaked at 04:17 and ended at 04:37 UTC.
An impulsive solar flare measuring X1.9 erupted from Active Region 4114 at 23:50 UTC on June 19, 2025. The event started at 23:37 and ended at 23:54 UTC.
An impulsive solar flare measuring X1.2 erupted from Active Region 4114 at 21:49 UTC on June 17, 2025. The event started at 21:38 and ended at 21:54 UTC.
A strong M8.4 solar flare erupted from Active Region 4114 at 18:07 UTC on June 15, 2025. This event began at 17:45 UTC, peaked at 18:07 UTC, and ended at 18:25 UTC.
A strong, long-duration solar flare registered as M8.1 erupted from Active Region 4100 at 00:05 UTC on May 31, 2025. The flare began at 23:31 UTC on May 30 and ended at 01:32 UTC on May 31. The eruption produced a significant coronal mass ejection (CME). Model forecasts indicate that the CME is Earth-directed and is expected to arrive on June 1.
