G1 – Minor Geomagnetic Storm Alert issued on March 23, 2026

A G1 – Minor Geomagnetic Storm Alert was issued at 01:07 UTC on March 23, 2026, following the geomagnetic K-index reaching a value of 5 at 01:05 UTC. The alert is active for the synoptic period from 00:00 to 03:00 UTC, according to NOAA’s Space Weather Prediction Center.

Potential impacts primarily affect areas poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations are possible, and minor impacts to satellite operations may occur. Auroras may be visible at high latitudes, including the northern tier of the United States, such as northern Michigan and Maine.

The alert was triggered by geomagnetic activity resulting from negative polarity coronal hole high speed stream (CH HSS) influences. The geomagnetic field is expected to experience periods of G1-G2 (Minor-Moderate) storming during March 23, 2026, due to these solar wind conditions.