G1 – Minor Geomagnetic Storm Alert issued on August 8, 2026

A G1 – Minor Geomagnetic Storm Alert was issued on August 8, 2026, by NOAA’s Space Weather Prediction Center. The alert was triggered when the geomagnetic K-index reached a value of 5 at 13:14 UTC, with the active period noted from 12:00 UTC to 15:00 UTC. This alert is currently active.

According to the alert details, the primary area of impact is poleward of 60 degrees geomagnetic latitude. Potential effects include weak power grid fluctuations, minor impacts on satellite operations, and the possibility of auroral displays at high latitudes. Aurora may be visible as far south as the northern tier of the United States, including northern Michigan and Maine.

Forecast discussions indicate that the elevated geomagnetic conditions are likely related to slight disturbances in the solar wind, attributed to weak CME influences from events that departed the Sun on August 4. Solar wind parameters showed temporary increases in total magnetic field strength and a brief southward deflection of the IMF Bz component. The overall geomagnetic field was previously quiet, and conditions are expected to return to quiet or unsettled as CME influences wane later in the day.