G1 – Minor Geomagnetic Storm Watch issued for April 25 and 26, 2026

A G1 – Minor Geomagnetic Storm Watch was issued by NOAA SWPC for April 25 and April 26, 2026. This Watch replaces any previous watches in effect and indicates a potential for minor geomagnetic storm conditions, with no storming predicted for April 27, 2026.

NOAA SWPC advises that impacts are expected to remain mostly poleward of 60 degrees geomagnetic latitude. Weak fluctuations in power grids may occur, and minor impacts on satellite operations are possible. Aurora may be visible at high latitudes, including northern areas of the U.S., such as northern Michigan and Maine. These effects are typical for a G1 – Minor level geomagnetic storm as defined by NOAA’s official space weather scales.

The Watch was prompted by recent elevated solar activity. Region 4419 produced two X-class (R3-Strong) solar flares on April 24, 2026—an X2.4 flare at 01:07 UTC and an X2.5 flare at 08:13 UTC—each accompanied by coronal mass ejections (CMEs). Modeling suggests a possible Earth-directed component from these CMEs may arrive late on April 25 into early April 26, leading to the issued G1 Watch.