:Product: 0327RSGA.txt :Issued: 2026 Mar 27 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 86 Issued at 2200Z on 27 Mar 2026 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: 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 on days one, two, and three (28 Mar, 29 Mar, 30 Mar). IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 522 km/s at 27/1504Z. Total IMF reached 5 nT at 27/0200Z. The maximum southward component of Bz reached -4 nT at 27/2058Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 12784 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (28 Mar), quiet to unsettled levels on day two (29 Mar) and quiet to active levels on day three (30 Mar). III. Event probabilities 28 Mar-30 Mar Class M 45/45/40 Class X 05/05/05 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 27 Mar 156 Predicted 28 Mar-30 Mar 158/155/155 90 Day Mean 27 Mar 140 V. Geomagnetic A Indices Observed Afr/Ap 26 Mar 007/010 Estimated Afr/Ap 27 Mar 007/007 Predicted Afr/Ap 28 Mar-30 Mar 006/005-007/008-013/015 VI. Geomagnetic Activity Probabilities 28 Mar-30 Mar A. Middle Latitudes Active 10/20/35 Minor Storm 01/05/15 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/10 Minor Storm 20/25/25 Major-severe storm 20/25/50