NOAA’s Space Weather Prediction Center (SWPC) issued a G1 – Minor geomagnetic storm watch for October 2, 2026, following a large filament eruption and associated coronal mass ejection (CME) on September 28. SWPC expects glancing effects from the CME, while NASA models place its arrival near the start of October 2 with an uncertainty of several hours.
NOAA’s Space Weather Prediction Center is forecasting the possible combined arrival of several coronal mass ejections (CMEs) from early September 8 into September 9, with isolated G1 – Minor geomagnetic storm periods likely and a slight chance of G2 – Moderate conditions. Confidence in the timing and magnitude of the arrivals remains low.
A strong M6.9 solar flare erupted from Active Region 4513 near the center of the visible solar disk at 10:02 UTC on August 25, 2026, causing an R2 – Moderate radio blackout. NOAA’s Space Weather Prediction Center (SWPC) said the associated CME and a second CME linked to a C4.7 flare and filament eruption later that day contained Earth-directed components, prompting a G2 – Moderate Geomagnetic Storm Watch for August 28. A G1 – Minor watch is in effect for August 27 due to an approaching coronal-hole high-speed stream.
Solar activity reached moderate levels on August 20, 2026, after Region 4513 produced an M8.1 flare at 11:42 UTC, the strongest of three M-class flares reported during the preceding 24-hour period. The flare was accompanied by Type II radio sweeps with an estimated velocity of 1 201 km/s
A long-duration M1.9 flare from Active Region 4492 coincided with a filament eruption near N20W67, producing an eruptive sequence associated with an Earth-directed partial-halo CME and an S1 – Minor solar radiation storm on July 30, 2026. WSA-Enlil model runs placed a possible CME arrival at Earth early on August 2, when NOAA’s Space Weather Prediction Center expects G1-G2 (Minor-Moderate) geomagnetic storm conditions.
A major solar flare measuring X1.3 erupted from newly numbered Active Region 4482 on the southeast limb at 20:41 UTC on July 4, 2026. A coronal mass ejection (CME) was produced, but due to the location of the source region, an Earth-directed component is unlikely.
A coronal mass ejection (CME) associated with the June 30, 2026, solar flare reached Earth on July 3, triggering a geomagnetic disturbance that intensified to G3 – Strong storm levels early July 4.
Multiple coronal mass ejections linked to repeated eruptions from Active Region 4479 are forecast to reach Earth in stages from July 3 through July 6, 2026. NOAA’s official forecast calls for G1–G2 geomagnetic storm conditions on July 3 and 4, while later CME arrivals remain under model assessment.
An X1.1 solar flare from Active Region 4479 produced a full-halo coronal mass ejection (CME) on June 30, 2026, prompting SWPC to issue a G2 – Moderate Geomagnetic Storm Watch for July 3.
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.
