:Product: 1031RSGA.txt :Issued: 2025 Oct 31 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 304 Issued at 2200Z on 31 Oct 2025 IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 3 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is likely to be low with a slight chance for an M-class flare on days two and three (02 Nov, 03 Nov). IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field has been at unsettled to minor storm levels for the past 24 hours. Solar wind speed reached a peak near 750 km/s around 31/0200Z. Total IMF reached 11 nT at 30/2101Z. The maximum southward component of Bz reached -9 nT at 31/0129Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 4,767 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to reach active levels through 03 Nov. III. Event probabilities 01 Nov-03 Nov Class M 05/10/10 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 31 Oct 125 Predicted 01 Nov-03 Nov 125/130/132 90 Day Mean 31 Oct 151 V. Geomagnetic A Indices Observed Afr/Ap 30 Oct 024/038 Estimated Afr/Ap 31 Oct 019/026 Predicted Afr/Ap 01 Nov-03 Nov 015/018-014/015-010/012 VI. Geomagnetic Activity Probabilities 01 Nov-03 Nov A. Middle Latitudes Active 35/35/25 Minor Storm 20/20/10 Major-severe storm 05/05/01 B. High Latitudes Active 10/10/15 Minor Storm 30/30/30 Major-severe storm 50/50/40