:Product: 1226RSGA.txt :Issued: 2025 Dec 26 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 360 Issued at 2200Z on 26 Dec 2025 IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 9 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (27 Dec, 28 Dec, 29 Dec). IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 608 km/s at 26/0233Z. Total IMF reached 6 nT at 25/2103Z. The maximum southward component of Bz reached -4 nT at 26/1013Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 8194 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (27 Dec, 28 Dec, 29 Dec). III. Event probabilities 27 Dec-29 Dec Class M 45/45/45 Class X 05/05/05 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 26 Dec 166 Predicted 27 Dec-29 Dec 170/175/170 90 Day Mean 26 Dec 146 V. Geomagnetic A Indices Observed Afr/Ap 25 Dec 008/011 Estimated Afr/Ap 26 Dec 007/008 Predicted Afr/Ap 27 Dec-29 Dec 006/005-005/005-006/005 VI. Geomagnetic Activity Probabilities 27 Dec-29 Dec A. Middle Latitudes Active 10/10/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/20/20 Major-severe storm 10/10/10