:Product: 0409RSGA.txt :Issued: 2026 Apr 09 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 99 Issued at 2200Z on 09 Apr 2026 IA. Analysis of Solar Active Regions and Activity from 08/2100Z to 09/2100Z: Solar activity has been at moderate levels for the past 24 hours. There are currently 5 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on day one (10 Apr) and expected to be low on days two and three (11 Apr, 12 Apr). IIA. Geophysical Activity Summary 08/2100Z to 09/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 426 km/s at 09/1130Z. Total IMF reached 9 nT at 09/1708Z. The maximum southward component of Bz reached -7 nT at 09/1447Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 10679 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on day one (10 Apr), unsettled to minor storm levels on day two (11 Apr) and quiet to active levels on day three (12 Apr). III. Event probabilities 10 Apr-12 Apr Class M 25/05/05 Class X 01/01/01 Proton 05/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 09 Apr 098 Predicted 10 Apr-12 Apr 095/090/090 90 Day Mean 09 Apr 136 V. Geomagnetic A Indices Observed Afr/Ap 08 Apr 006/007 Estimated Afr/Ap 09 Apr 008/010 Predicted Afr/Ap 10 Apr-12 Apr 017/024-025/032-014/017 VI. Geomagnetic Activity Probabilities 10 Apr-12 Apr A. Middle Latitudes Active 45/35/30 Minor Storm 25/30/10 Major-severe storm 01/10/01 B. High Latitudes Active 10/10/15 Minor Storm 25/25/30 Major-severe storm 65/65/40