:Product: 0330RSGA.txt :Issued: 2026 Mar 30 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 89 Issued at 2200Z on 30 Mar 2026 IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: Solar activity has been at high levels for the past 24 hours. There are currently 9 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 (31 Mar, 01 Apr, 02 Apr). IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 526 km/s at 30/0621Z. Total IMF reached 12 nT at 29/2324Z. The maximum southward component of Bz reached -7 nT at 30/0422Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1347 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to major storm levels on day one (31 Mar), quiet to minor storm levels on day two (01 Apr) and quiet to unsettled levels on day three (02 Apr). Protons have a chance of crossing threshold on days one and two (31 Mar, 01 Apr) and have a chance of crossing threshold on day three (02 Apr). III. Event probabilities 31 Mar-02 Apr Class M 55/55/55 Class X 10/10/10 Proton 50/50/25 PCAF green IV. Penticton 10.7 cm Flux Observed 30 Mar 152 Predicted 31 Mar-02 Apr 152/155/155 90 Day Mean 30 Mar 139 V. Geomagnetic A Indices Observed Afr/Ap 29 Mar 011/014 Estimated Afr/Ap 30 Mar 014/017 Predicted Afr/Ap 31 Mar-02 Apr 020/035-019/024-008/008 VI. Geomagnetic Activity Probabilities 31 Mar-02 Apr A. Middle Latitudes Active 30/40/15 Minor Storm 30/25/05 Major-severe storm 20/05/01 B. High Latitudes Active 05/10/20 Minor Storm 20/25/30 Major-severe storm 75/60/25