G2 – Moderate Geomagnetic Storm Watch issued for June 6, 2026

A G2 – Moderate Geomagnetic Storm Watch was issued for June 6, 2026. The Watch, released by NOAA SWPC on June 5, 2026 at 18:52 UTC, covers a period where geomagnetic activity is expected to reach the G2 – Moderate level on June 6 before returning to conditions below G1 on June 7 and June 8. This new Watch supersedes any previous watches that may have been in effect.

Potential impacts for this event are primarily expected in areas poleward of 55 degrees geomagnetic latitude. According to the alert, power grid fluctuations may occur, and high-latitude power systems could experience voltage alarms. There is also potential for spacecraft orientation irregularities and increased drag on low Earth-orbit satellites. High-frequency (HF) radio propagation may experience fading at higher latitudes. Additionally, auroral activity may be visible as far south as New York, Wisconsin, and Washington state.

Based on the latest official SWPC forecast discussion, the anticipated geomagnetic storm conditions are the result of multiple Coronal Mass Ejections (CMEs) that departed the Sun on June 3. These CMEs arrived at Earth early on June 5, causing significant enhancements in solar wind speed and magnetic field strength. Disturbed and elevated solar wind conditions are forecasted to continue through early June 6 before settling towards background levels by June 7.