:Product: 0404RSGA.txt :Issued: 2026 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 2026 IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity has been at high 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 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 quiet to major storm levels for the past 24 hours. Solar wind speed reached a peak of 742 km/s at 03/2132Z. Total IMF reached 6 nT at 03/2107Z. The maximum southward component of Bz reached -4 nT at 03/2257Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 3 pfu at 03/2145Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2418 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (05 Apr) and quiet to unsettled levels on days two and three (06 Apr, 07 Apr). Protons have a slight chance of crossing threshold on days one, two, and three (05 Apr, 06 Apr, 07 Apr). III. Event probabilities 05 Apr-07 Apr Class M 55/55/55 Class X 20/20/20 Proton 20/20/20 PCAF green IV. Penticton 10.7 cm Flux Observed 04 Apr 128 Predicted 05 Apr-07 Apr 125/125/120 90 Day Mean 04 Apr 138 V. Geomagnetic A Indices Observed Afr/Ap 03 Apr 025/049 Estimated Afr/Ap 04 Apr 019/025 Predicted Afr/Ap 05 Apr-07 Apr 011/015-010/010-008/008 VI. Geomagnetic Activity Probabilities 05 Apr-07 Apr A. Middle Latitudes Active 30/15/15 Minor Storm 15/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 30/25/25 Major-severe storm 40/25/25