G1 – Minor Geomagnetic Storm Watch issued for November 6 and 7, 2025

A G1 – Minor Geomagnetic Storm Watch has been issued by NOAA SWPC, with peak geomagnetic activity predicted for November 6 and 7, 2025. The watch was announced on November 4, 2025 at 21:40 UTC and supersedes any prior watches in effect. Storm levels are forecast to remain below G1 through November 5, rising to G1 – Minor on both November 6 and 7.

According to the SWPC alert, potential impacts from this event are expected primarily poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations may occur. Minor impacts on satellite operations are possible. Auroral activity may become visible at high latitudes, including the northern tier of the United States, such as northern Michigan and Maine.

The watch is being triggered by an expected combination of a coronal hole high speed stream and the arrival of a coronal mass ejection (CME) associated with M-class flaring activity from solar Region 4274. The largest flare reached M3.5 intensity at 01:48 UTC on November 4. Enhanced solar wind conditions are forecast late on November 6 into November 7, increasing the likelihood of geomagnetic storm activity to G1 levels.