G1 – Minor Geomagnetic Storm Alert issued on April 3

A G1 – Minor Geomagnetic Storm Alert was issued on April 3, 2026, after the geomagnetic K-index reached a value of 5. The alert is active and covers the synoptic period from 06:00 to 09:00 UTC, according to the NOAA Space Weather Prediction Center.

Potential impacts from this event include weak power grid fluctuations, minor disturbances to satellite operations, and visible aurora at high latitudes. The primary area of impact is expected poleward of 60 degrees geomagnetic latitude, including regions such as northern Michigan and Maine in the United States.

This geomagnetic activity follows recent moderate solar activity, highlighted by an M3.5 flare from Region 4404 that peaked at 18:15 UTC on April 2. Associated with this event was a narrow coronal mass ejection detected in coronagraph imagery after 18:48 UTC, and continued influences from a coronal hole high-speed solar wind stream are driving enhanced solar wind conditions.