:Product: Report of Solar-Geophysical Activity :Issued: 2025 Nov 04 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 308 Issued at 2200Z on 04 Nov 2025 IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity has been at high levels for the past 24 hours. There are currently 5 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is likely to be moderate with a slight chance for an X-class flare on days one, two, and three (05 Nov, 06 Nov, 07 Nov). IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 486 km/s at 03/2209Z. Total IMF reached 9 nT at 04/0758Z. The maximum southward component of Bz reached -6 nT at 04/1009Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2438 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (05 Nov), quiet to minor storm levels on day two (06 Nov) and unsettled to minor storm levels on day three (07 Nov). Protons have a slight chance of crossing threshold on days one, two, and three (05 Nov, 06 Nov, 07 Nov). III. Event probabilities 05 Nov-07 Nov Class M 65/65/65 Class X 15/15/15 Proton 10/10/10 PCAF green IV. Penticton 10.7 cm Flux Observed 04 Nov 159 Predicted 05 Nov-07 Nov 130/135/135 90 Day Mean 04 Nov 150 V. Geomagnetic A Indices Observed Afr/Ap 03 Nov 018/020 Estimated Afr/Ap 04 Nov 010/012 Predicted Afr/Ap 05 Nov-07 Nov 006/008-016/018-020/024 VI. Geomagnetic Activity Probabilities 05 Nov-07 Nov A. Middle Latitudes Active 10/35/40 Minor Storm 01/25/30 Major-severe storm 01/05/05 B. High Latitudes Active 20/10/10 Minor Storm 20/25/20 Major-severe storm 10/60/65