A coronal mass ejection (CME) associated with an X8.1 solar flare from Region 4366 at 23:57 UTC on February 1 is forecast to glance Earth late on February 5, 2026. The impact is expected to produce G1 – Minor geomagnetic storm conditions and possible auroral activity poleward of 60 degrees Geomagnetic Latitude. This was the third-strongest solar flare of Solar Cycle 25.
The impact of a full halo coronal mass ejection (CME) at Earth on January 19, 2026, drove geomagnetic activity to G4 – Severe levels, producing widespread aurora across Europe, Asia, and the United States.
Two coronal mass ejections (CMEs) launched from Active Region 4246 on October 13, 2025, are heading toward Earth and are expected to impact Earth over the next couple of days, according to NOAA’s Space Weather Prediction Center (SWPC). Model output indicates arrival around mid to late October 17, though forecasters note a possible earlier impact as both CMEs interact with earlier ejecta from the same region.
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 coronal mass ejection (CME) produced by the August 30, 2025, long-duration M2.7 solar flare impacted Earth at 21:01 UTC on September 1, producing G1 – Minor to G2 – Moderate geomagnetic storm conditions.
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.
Two coronal mass ejections (CMEs) produced on December 29, 2024, impacted Earth on December 31, causing G4 – Severe geomagnetic storm on January 1, 2025. A slow return to nominal levels is expected by late on January 2. Late on January 3 to early on January 4, a potential glancing blow from the January 1 CME is likely to cause another enhancement.
At least two coronal mass ejections (CMEs) are heading toward Earth, with impacts expected on December 31 and January 1, 2025. The first CME — much stronger, was produced by a filament eruption associated with an M2.0 flare at 04:30 UTC on December 29 from Active Region (AR) 3939. This resulted in an asymmetric, partial-halo CME first seen in NASA coronagraph imagery at approximately 06:24 UTC.
A coronal mass ejection (CME) produced on December 13, 2024, impacted Earth at 05:19 UTC on December 17, sparking G1 – Minor geomagnetic storming. The K-index reached 5 at 08:07 UTC, with effects limited to areas poleward of 60 degrees geomagnetic latitude. Enhanced solar wind conditions, driven by a positive polarity coronal hole high-speed stream (CH HSS), are expected to continue through December 18. Meanwhile, solar activity remains low, with a 30-40% chance of M-class flares and a 5% chance of X-class flares through December 19.
Coronal mass ejection (CME) produced by X1.8 solar flare on October 9, 2024, impacted Earth at 15:15 UTC on October 10, at nearly 2.4 million km/h (1.5 million miles per hour), triggering G4 – Severe geomagnetic storm.
