G2 – Moderate Geomagnetic Storm Alert issued on April 3, 2026

A G2 – Moderate Geomagnetic Storm Alert was issued on April 3, 2026. The alert indicates that the geomagnetic K-index reached 6 at 23:03 UTC, and the active warning is valid from 21:00 UTC to 24:00 UTC. This event was classified on the NOAA Scale as G2 – Moderate.

Potential impacts include power grid fluctuations, especially poleward of 55 degrees geomagnetic latitude, and possible voltage alarms in high-latitude power systems. Satellite operators may observe orientation irregularities and increased drag on low Earth-orbit satellites. High frequency radio propagation can fade at higher latitudes, potentially affecting communication. Aurora may be visible as far south as New York, Wisconsin, and Washington state.

According to the latest SWPC forecast discussion, recent G1-G2 (Minor-Moderate) geomagnetic storm conditions have been driven by negative polarity coronal hole high-speed streams (CH HSS) and the possible initial arrival of a coronal mass ejection (CME) that departed the Sun on April 1. Further G1-G2 storming is likely, with a chance for G3 (Strong) levels as CH HSS influences continue and the anticipated passage of the CME may enhance conditions further early on April 4.