G1 – Minor Geomagnetic Storm Watch issued for March 31, 2026

A G1 – Minor Geomagnetic Storm Watch was issued for March 31, 2026, by the NOAA Space Weather Prediction Center. The watch announcement was quickly cancelled due to an incorrect date, according to official communications released at 12:28 UTC and 12:27 UTC, respectively.

Potential impacts from a G1 – Minor Geomagnetic Storm would primarily affect areas poleward of 60 degrees geomagnetic latitude. These include weak power grid fluctuations, minor impacts on satellite operations, and the possibility of aurora sightings at high latitudes—such as the northern tier of the United States including northern Michigan and Maine.

The geomagnetic activity outlook from SWPC indicated active space weather conditions, with the potential for G2 (Moderate) and isolated G3 (Strong) geomagnetic storm levels on March 31 as a result of a coronal mass ejection linked to the X1.4 flare at 03:19 UTC on March 30. As CME effects wane, active to G1 (Minor) geomagnetic storm levels were expected to continue into April 1, followed by a transition to coronal hole high speed stream (CH HSS) activity later in the period.