G1 – Minor Geomagnetic Storm Alert issued on March 22

A G1 – Minor Geomagnetic Storm Alert was issued for March 22, 2026, after the Geomagnetic K-index reached a threshold of 5 at 23:30 UTC. The alert is valid for the synoptic period from 21:00 UTC to 24:00 UTC. An active warning is in effect as of the issue time at 23:39 UTC. NOAA has indicated that the alert start time has been corrected.

Potential impacts from this geomagnetic storm are expected primarily poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations may occur due to induced currents, and there is a possibility of minor impacts on satellite operations. Aurora may be visible at high latitudes, including the northern tier of the United States such as northern Michigan and Maine.

According to the latest forecast discussion from NOAA SWPC, solar wind parameters continue to reflect CME influences, and the geomagnetic field has been at unsettled to G1 (Minor) levels before escalating to higher storm levels earlier in the period. The solar wind environment is forecast to remain enhanced, with CME effects expected to diminish and further disturbance anticipated from high-speed solar wind streams related to coronal holes through March 24, 2026.