G1 – Minor Geomagnetic Storm Alert issued on April 2

A G1 – Minor Geomagnetic Storm Alert was issued on April 2, 2026. The alert was triggered by a geomagnetic K-index of 5, with the threshold reached at 14:30 UTC. The alert covers the synoptic period from 12:00 UTC to 15:00 UTC on this date. An active warning is in effect, as confirmed by the NOAA Space Weather Prediction Center.

Potential impacts of this event are expected primarily poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations may occur in these areas. Minor impacts on satellite operations are possible. In addition, auroras may become visible at higher latitudes, including northern parts of the United States such as northern Michigan and Maine.

The latest official forecast discussion indicates that the geomagnetic field reached G1 – Minor storm levels due to the combined influence of a coronal mass ejection (CME) and the onset of coronal hole high speed stream (CH HSS) activity. Solar wind conditions contributed to the enhancement of geomagnetic activity during this period.