:Product: 0330RSGA.txt :Issued: 2025 Mar 30 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 89 Issued at 2200Z on 30 Mar 2025 IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: Solar activity has been at high levels for the past 24 hours. There are currently 6 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 day one (31 Mar) and expected to be low with a chance for M-class flares and a slight chance for an X-class flare on days two and three (01 Apr, 02 Apr). IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 505 km/s at 29/2230Z. Total IMF reached 21 nT at 30/2055Z. The maximum southward component of Bz reached -5 nT at 30/0658Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2772 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (31 Mar, 01 Apr, 02 Apr). III. Event probabilities 31 Mar-02 Apr Class M 55/50/50 Class X 10/10/10 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 30 Mar 171 Predicted 31 Mar-02 Apr 170/175/175 90 Day Mean 30 Mar 180 V. Geomagnetic A Indices Observed Afr/Ap 29 Mar 010/012 Estimated Afr/Ap 30 Mar 010/012 Predicted Afr/Ap 31 Mar-02 Apr 007/008-009/010-008/008 VI. Geomagnetic Activity Probabilities 31 Mar-02 Apr A. Middle Latitudes Active 15/20/15 Minor Storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/30/25 Major-severe storm 25/25/25