G1 – Minor Geomagnetic Storm Alert issued on March 22, 2026

A G1 – Minor Geomagnetic Storm Alert was issued for March 22, 2026, after the geomagnetic K-index reached a threshold of 5. The alert was announced at 23:31 UTC, with the active period noted between 21:00 and 24:00 UTC.

According to the NOAA SWPC, impacts are primarily expected poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations may occur due to induced currents, and minor impacts on satellite operations are possible. Aurora may be visible at high latitudes, including the northern tier of the United States such as northern Michigan and Maine. These impacts are consistent with a G1 – Minor classification on the NOAA Geomagnetic Storm Scale.

The latest SWPC forecast discussion indicates that the geomagnetic disturbance was due to waning coronal mass ejection (CME) effects and the anticipated onset of high-speed solar wind streams from a coronal hole. Solar wind parameters reached a peak speed of 600 km/s, with an enhanced interplanetary magnetic field. The environment is expected to remain enhanced as the recurrent coronal hole high-speed stream continues through March 24, 2026.