CME associated with a filament eruption near Region 3901 on November 25, 2024, is forecast to reach Earth late November 28 (UTC).
As a result, the NOAA Space Weather Prediction Center (SWPC) is forecasting a G1 – Minor geomagnetic storm for November 28 and a G2 – Moderate for November 29.
G2 – Moderate geomagnetic storms can produce a range of effects primarily affecting areas poleward of 55 degrees geomagnetic latitude.
Storms of this intensity may cause power grid fluctuations and voltage alarms in high-latitude power systems. Satellites could also experience irregularities in their orientation, along with increased atmospheric drag on those in low Earth orbit. Additionally, high-frequency (HF) radio communications may experience fading at higher latitudes, potentially disrupting communication.
Aurora displays may extend as far south as regions like New York, Wisconsin, and Washington state.
Solar wind parameters over the past 24 hours continued to reflect weak, negative polarity coronal hole high speed stream (CH HSS) influence. The total field was between 6 – 9 nT with the Bz component oscillating between +/- 7 nT.
Solar wind speeds averaged around 415 km/s while the phi angle remained in the negative orientation through much of the period.
References:
1 Forecast Discussion – NOAA/SWPC – Issued at 12:30 UTC on November 26, 2024