:Product: 0312RSGA.txt :Issued: 2026 Mar 12 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 71 Issued at 2200Z on 12 Mar 2026 IA. Analysis of Solar Active Regions and Activity from 11/2100Z to 12/2100Z: 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 slight chance for an M-class flare on days one, two, and three (13 Mar, 14 Mar, 15 Mar). IIA. Geophysical Activity Summary 11/2100Z to 12/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 486 km/s at 11/2245Z. Total IMF reached 6 nT at 12/0124Z. The maximum southward component of Bz reached -5 nT at 12/1258Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2940 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on days one and two (13 Mar, 14 Mar) and quiet to active levels on day three (15 Mar). III. Event probabilities 13 Mar-15 Mar Class M 20/20/20 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 12 Mar 121 Predicted 13 Mar-15 Mar 120/115/110 90 Day Mean 12 Mar 142 V. Geomagnetic A Indices Observed Afr/Ap 11 Mar 007/009 Estimated Afr/Ap 12 Mar 007/008 Predicted Afr/Ap 13 Mar-15 Mar 015/020-017/020-012/012 VI. Geomagnetic Activity Probabilities 13 Mar-15 Mar A. Middle Latitudes Active 45/45/35 Minor Storm 25/25/15 Major-severe storm 05/05/01 B. High Latitudes Active 05/05/10 Minor Storm 20/20/25 Major-severe storm 65/65/45