:Product: 0326RSGA.txt :Issued: 2025 Mar 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 85 Issued at 2200Z on 26 Mar 2025 IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity has been at moderate levels for the past 24 hours. There are currently 4 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 Mar, 28 Mar, 29 Mar). IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field has been at quiet to major storm levels for the past 24 hours. Solar wind speed reached a peak of 658 km/s at 26/1950Z. Total IMF reached 24 nT at 26/1213Z. The maximum southward component of Bz reached -22 nT at 26/1213Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 168 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at active to major storm levels on day one (27 Mar), active levels on day two (28 Mar) and quiet to unsettled levels on day three (29 Mar). III. Event probabilities 27 Mar-29 Mar Class M 30/25/25 Class X 05/01/01 Proton 05/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 26 Mar 152 Predicted 27 Mar-29 Mar 155/160/160 90 Day Mean 26 Mar 184 V. Geomagnetic A Indices Observed Afr/Ap 25 Mar 013/015 Estimated Afr/Ap 26 Mar 024/033 Predicted Afr/Ap 27 Mar-29 Mar 028/040-018/025-013/015 VI. Geomagnetic Activity Probabilities 27 Mar-29 Mar A. Middle Latitudes Active 45/35/20 Minor Storm 25/20/05 Major-severe storm 05/05/01 B. High Latitudes Active 10/10/15 Minor Storm 25/25/25 Major-severe storm 60/50/25