G2 – Moderate Geomagnetic Storm Alert issued on April 3

A G2 – Moderate Geomagnetic Storm Alert was issued on April 3, 2026. The alert indicates that a Geomagnetic K-index of 6 was reached at 15:55 UTC, with the alert remaining active and valid for the synoptic period from 15:00 to 18:00 UTC.

Potential impacts due to this storm are expected primarily poleward of 55 degrees geomagnetic latitude. Power grid fluctuations may occur, with high-latitude power systems potentially experiencing voltage alarms. Satellite operators should be alert for orientation irregularities and increased drag on low Earth-orbit satellites. HF radio propagation can be disrupted at higher latitudes, and aurora sightings are possible as far south as New York, Wisconsin, and Washington state.

According to the NOAA SWPC, the current geomagnetic storm activity is being driven by ongoing negative polarity coronal hole high speed stream (CH HSS) influences. The solar wind environment is forecast to remain enhanced due to these influences, with a possible further increase associated with the anticipated glancing arrival of a CME that departed the Sun on April 1, 2026.