G1 – Minor Geomagnetic Storm Alert issued on November 8

A G1 – Minor Geomagnetic Storm Alert was issued by NOAA SWPC on November 8, 2026 at 02:03 UTC. The alert pertains to a geomagnetic K-index of 5, with the threshold reached during the synoptic period from 00:00 to 03:00 UTC. The alert remains active, indicating geomagnetic storm conditions at the minor level.

Potential impacts from this event are expected primarily in areas poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations can occur, and there may be minor effects on satellite operations. Additionally, auroras may become visible at high latitudes, including the northern tier of the United States such as northern Michigan and Maine.

According to the latest forecast discussion, the geomagnetic field reached G1 (Minor) geomagnetic storm levels late in the day due to the influence of a negative polarity coronal hole high-speed stream (CH HSS). Solar wind speeds increased significantly during this period, contributing to the enhanced geomagnetic activity.