:Product: 0403RSGA.txt :Issued: 2026 Apr 03 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 93 Issued at 2200Z on 03 Apr 2026 IA. Analysis of Solar Active Regions and Activity from 02/2100Z to 03/2100Z: Solar activity has been at moderate levels for the past 24 hours. There are currently 8 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 (04 Apr, 05 Apr, 06 Apr). IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z: The geomagnetic field has been at active to severe storm levels for the past 24 hours. Solar wind speed reached a peak of 858 km/s at 03/1518Z. Total IMF reached 14 nT at 03/1515Z. The maximum southward component of Bz reached -11 nT at 03/1519Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 6 pfu at 03/0405Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 4465 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to major storm levels on day one (04 Apr), quiet to minor storm levels on day two (05 Apr) and quiet to active levels on day three (06 Apr). Protons have a slight chance of crossing threshold on days one, two, and three (04 Apr, 05 Apr, 06 Apr). III. Event probabilities 04 Apr-06 Apr Class M 55/55/55 Class X 15/15/15 Proton 15/15/15 PCAF green IV. Penticton 10.7 cm Flux Observed 03 Apr 136 Predicted 04 Apr-06 Apr 135/140/140 90 Day Mean 03 Apr 138 V. Geomagnetic A Indices Observed Afr/Ap 02 Apr 030/043 Estimated Afr/Ap 03 Apr 028/054 Predicted Afr/Ap 04 Apr-06 Apr 025/037-014/018-010/012 VI. Geomagnetic Activity Probabilities 04 Apr-06 Apr A. Middle Latitudes Active 30/40/30 Minor Storm 35/25/15 Major-severe storm 25/05/01 B. High Latitudes Active 05/10/15 Minor Storm 15/25/30 Major-severe storm 80/65/40