:Product: 0407RSGA.txt :Issued: 2026 Apr 08 0035 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 97 Issued at 2200Z on 07 Apr 2026 IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 7 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares and a slight chance for an X-class flare on days one, two, and three (08 Apr, 09 Apr, 10 Apr). IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 540 km/s at 06/2110Z. Total IMF reached 5 nT at 07/2048Z. The maximum southward component of Bz reached -5 nT at 07/2046Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 7358 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (08 Apr, 09 Apr) and quiet to minor storm levels on day three (10 Apr). Protons have a slight chance of crossing threshold on days one, two, and three (08 Apr, 09 Apr, 10 Apr). III. Event probabilities 08 Apr-10 Apr Class M 35/35/35 Class X 10/10/10 Proton 10/10/10 PCAF green IV. Penticton 10.7 cm Flux Observed 07 Apr 109 Predicted 08 Apr-10 Apr 105/105/100 90 Day Mean 07 Apr 137 V. Geomagnetic A Indices Observed Afr/Ap 06 Apr 006/010 Estimated Afr/Ap 07 Apr 010/010 Predicted Afr/Ap 08 Apr-10 Apr 007/008-007/008-015/024 VI. Geomagnetic Activity Probabilities 08 Apr-10 Apr A. Middle Latitudes Active 10/15/40 Minor Storm 01/01/25 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/10 Minor Storm 25/25/25 Major-severe storm 20/20/60