G2 – Moderate Geomagnetic Storm Alert issued on March 22

A G2 – Moderate Geomagnetic Storm Alert was issued on March 22, 2026, after the geomagnetic K-index reached a value of 6. The alert covers the synoptic period from 18:00 UTC to 21:00 UTC. This alert, issued at 20:03 UTC, indicates active warning conditions according to NOAA’s space weather scales.

Potential impacts primarily affect regions poleward of 55 degrees geomagnetic latitude. Power grid fluctuations may occur and high-latitude power systems could experience voltage alarms. Satellite operators may encounter orientation irregularities, and an increase in drag on low Earth-orbit satellites is possible. High frequency (HF) radio propagation may fade at higher latitudes. There is also potential for aurora sightings as far south as New York, Wisconsin, and Washington state.

The triggering event for this alert is attributed to enhanced solar wind parameters reflecting the influence of a recent coronal mass ejection (CME) and the onset of recurrent, negative polarity coronal hole high speed stream (CH HSS) influences. While solar activity was at low levels with only C-class flare activity observed, the geomagnetic field activity increased, prompting the alert. The solar wind speed reached up to 600 km/s, and further G2 – Moderate to G3 – Strong geomagnetic storming is expected as CME influences wane and CH HSS effects continue.