Date: 2025 Aug 30 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Solar activity decreased to low levels. Region 4197 (S18W03, Ekc/beta-gamma-delta) produced most of the C-flare activity observed this period, the largest being a C5.9 at 29/1238 UTC, and the region developed additional intermediate spots. New Region 4207 (N30E76, Hax/alpha) was numbered, while the remaining regions were stable. No Earth-directed CMEs were observed in coronagraph imagery.
Forecast: M-class flares (R1-R2/Minor-Moderate) are likely, with a slight chance for an X-class flare (R3-Strong or greater), through 01 Sep.Energetic Particle The greater than 2 MeV electron flux was at normal to moderate levels. The greater than 10 MeV proton flux remained elevated but continued a gradual decline toward background levels.
Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels over 30 Aug-01 Sep. There is a slight chance for the greater than 10 MeV proton flux to reach S1 (Minor) storm levels through 01 Sep.
Nominal solar wind conditions prevailed throughout the period. Total magnetic field strength peaked at 7 nT, and the Bz component varied between +5/-6 nT. Solar wind speed was steady, ranging between ~350-415 km/s.
Forecast: Nominal solar wind conditions are expected to prevail on 30 Aug. Mildly enhanced conditions are expected on 31 Aug-01 Sep due to negative polarity CH HSS influences.
Forecast: The geomagnetic field is expected to be quiet on 30 Aug, with quiet to unsettled levels expected on 31 Aug-01 Sep due to negative polarity CH HSS influences.