:Product: 0329RSGA.txt :Issued: 2026 Mar 29 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 88 Issued at 2200Z on 29 Mar 2026 IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 9 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 (30 Mar, 31 Mar, 01 Apr). IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 473 km/s at 29/1824Z. Total IMF reached 13 nT at 29/1720Z. The maximum southward component of Bz reached -7 nT at 29/0330Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 3754 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on day one (30 Mar), quiet to active levels on day two (31 Mar) and quiet levels on day three (01 Apr). III. Event probabilities 30 Mar-01 Apr Class M 45/45/45 Class X 10/10/10 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 29 Mar 158 Predicted 30 Mar-01 Apr 155/152/155 90 Day Mean 29 Mar 139 V. Geomagnetic A Indices Observed Afr/Ap 28 Mar 008/011 Estimated Afr/Ap 29 Mar 013/018 Predicted Afr/Ap 30 Mar-01 Apr 017/022-010/012-007/008 VI. Geomagnetic Activity Probabilities 30 Mar-01 Apr A. Middle Latitudes Active 40/30/20 Minor Storm 25/10/05 Major-severe storm 05/01/01 B. High Latitudes Active 10/15/15 Minor Storm 25/25/30 Major-severe storm 65/40/25