:Product: 1207RSGA.txt :Issued: 2025 Dec 07 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 341 Issued at 2200Z on 07 Dec 2025 IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 7 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 (08 Dec, 09 Dec, 10 Dec). IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 732 km/s at 06/2106Z. Total IMF reached 9 nT at 07/1318Z. The maximum southward component of Bz reached -5 nT at 07/0216Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1452 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on days one and three (08 Dec, 10 Dec) and minor storm to severe storm levels on day two (09 Dec). Protons have a slight chance of crossing threshold on days one, two, and three (08 Dec, 09 Dec, 10 Dec). III. Event probabilities 08 Dec-10 Dec Class M 65/65/65 Class X 15/15/15 Proton 15/15/15 PCAF green IV. Penticton 10.7 cm Flux Observed 07 Dec 194 Predicted 08 Dec-10 Dec 190/190/185 90 Day Mean 07 Dec 148 V. Geomagnetic A Indices Observed Afr/Ap 06 Dec 015/016 Estimated Afr/Ap 07 Dec 011/013 Predicted Afr/Ap 08 Dec-10 Dec 013/018-048/070-022/033 VI. Geomagnetic Activity Probabilities 08 Dec-10 Dec A. Middle Latitudes Active 30/20/35 Minor Storm 30/30/35 Major-severe storm 20/50/20 B. High Latitudes Active 05/05/05 Minor Storm 20/15/20 Major-severe storm 70/85/75