G1 – Minor Geomagnetic Storm Watch issued for April 1, 2026

A G1 – Minor Geomagnetic Storm Watch has been issued for April 1, 2026. According to the latest alert, geomagnetic conditions are predicted to reach G2 – Moderate levels on March 31, followed by G1 – Minor storm levels from April 1 through April 2. This Watch supersedes any previous watches in effect.

Potential impacts from the forecasted storm activity include weak power grid fluctuations, with the primary area of impact being regions poleward of 60 degrees geomagnetic latitude. Minor impacts on satellite operations are also possible. Additionally, auroras may be visible at high latitudes, including the northern tier of the United States such as northern Michigan and Maine.

The trigger for this watch is the arrival of a coronal mass ejection (CME) associated with an X1.4 solar flare that occurred at 03:19 UTC on March 30, 2026, from Region 4405. Enhanced solar wind disturbances resulting from this CME are expected to drive the geomagnetic activity. Conditions are forecast to subside as CME effects wane and give way to coronal hole high-speed stream activity by late April 2.