Overview
- Russia’s Laboratory of Solar Astronomy (IKI RAN) confirmed the arrival of a high‑speed solar wind stream, with geomagnetic indices still in the green range for now.
- Indices are forecast to rise into yellow and potentially red over the next one to three days, bringing a probability of weak geomagnetic storms.
- The influx arrived without a sharp shock as wind speed increased gradually, which has delayed an immediate spike in disturbance levels.
- Auroral displays are considered likely at high latitudes, while sightings around Moscow and lower latitudes are viewed as unlikely.
- Solar activity remains moderate with seven C‑class flares in the past day and elevated X‑ray flux, and researchers note the recurrent coronal hole has been tracked since September 2025 and appears to be weakening, with elevated storm frequency likely to persist through about 2028.