:Product: 1027RSGA.txt :Issued: 2025 Oct 27 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 300 Issued at 2200Z on 27 Oct 2025 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: 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 low on days one, two, and three (28 Oct, 29 Oct, 30 Oct). IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 407 km/s at 27/2057Z. Total IMF reached 10 nT at 27/2045Z. The maximum southward component of Bz reached -6 nT at 27/1602Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 899 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at active to minor storm levels on day one (28 Oct) and unsettled to minor storm levels on days two and three (29 Oct, 30 Oct). III. Event probabilities 28 Oct-30 Oct Class M 05/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 27 Oct 121 Predicted 28 Oct-30 Oct 120/120/125 90 Day Mean 27 Oct 152 V. Geomagnetic A Indices Observed Afr/Ap 26 Oct 004/004 Estimated Afr/Ap 27 Oct 010/012 Predicted Afr/Ap 28 Oct-30 Oct 024/035-021/030-020/025 VI. Geomagnetic Activity Probabilities 28 Oct-30 Oct A. Middle Latitudes Active 35/40/40 Minor Storm 35/30/20 Major-severe storm 15/15/05 B. High Latitudes Active 05/05/10 Minor Storm 20/25/25 Major-severe storm 75/70/60