:Product: 0404RSGA.txt :Issued: 2025 Apr 04 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 94 Issued at 2200Z on 04 Apr 2025 IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 10 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 (05 Apr, 06 Apr, 07 Apr). IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic field has been at active to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 571 km/s at 04/1956Z. Total IMF reached 14 nT at 04/0935Z. The maximum southward component of Bz reached -12 nT at 04/0926Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 473 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to minor storm levels on day one (05 Apr), quiet to active levels on day two (06 Apr) and quiet to unsettled levels on day three (07 Apr). Protons greater than 10 Mev have a slight chance of crossing threshold on day one (05 Apr). III. Event probabilities 05 Apr-07 Apr Class M 65/60/55 Class X 15/10/10 Proton 10/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 04 Apr 180 Predicted 05 Apr-07 Apr 175/175/170 90 Day Mean 04 Apr 178 V. Geomagnetic A Indices Observed Afr/Ap 03 Apr 025/ 021 Estimated Afr/Ap 04 Apr 028/043 Predicted Afr/Ap 05 Apr-07 Apr 020/005-010/004-008/003 VI. Geomagnetic Activity Probabilities 05 Apr-07 Apr A. Middle Latitudes Active 35/35/20 Minor Storm 25/20/05 Major-severe storm 05/05/01 B. High Latitudes Active 05/10/15 Minor Storm 15/30/25 Major-severe storm 60/50/25