G1 – Minor Geomagnetic Storm Alert issued on April 3, 2026

A G1 – Minor Geomagnetic Storm Alert was issued on April 3, 2026. The alert was triggered at 19:06 UTC, with the synoptic period covering 18:00 to 21:00 UTC. The warning is currently active as indicated by the NOAA Space Weather Prediction Center.

Potential impacts under the G1 – Minor classification primarily affect areas poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations may occur due to induced currents, and there is a minor potential impact on satellite operations. Aurora may be visible at high latitudes, including the northern tier of the U.S., such as northern Michigan and Maine.

This alert was triggered by enhanced geomagnetic activity resulting from ongoing negative polarity coronal hole high speed stream (CH HSS) influences. NOAA forecasters expect these enhanced solar wind conditions to persist through April 5, 2026, with the possibility of additional geomagnetic disturbances associated with a coronal mass ejection (CME) from April 1, 2026, potentially arriving late on April 3 or early April 4.