:Product: 0612RSGA.txt :Issued: 2026 Jun 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 163 Issued at 2200Z on 12 Jun 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 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 days one, two, and three (13 Jun, 14 Jun, 15 Jun). IIA. Geophysical Activity Summary 11/2100Z to 12/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 577 km/s at 12/1607Z. Total IMF reached 15 nT at 12/0126Z. The maximum southward component of Bz reached -10 nT at 12/0136Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 464 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to major storm levels on day one (13 Jun), unsettled to minor storm levels on day two (14 Jun) and quiet to active levels on day three (15 Jun). III. Event probabilities 13 Jun-15 Jun Class M 35/35/35 Class X 05/05/05 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 12 Jun 128 Predicted 13 Jun-15 Jun 128/125/122 90 Day Mean 12 Jun 126 V. Geomagnetic A Indices Observed Afr/Ap 11 Jun 016/018 Estimated Afr/Ap 12 Jun 017/021 Predicted Afr/Ap 13 Jun-15 Jun 025/036-016/022-010/012 VI. Geomagnetic Activity Probabilities 13 Jun-15 Jun A. Middle Latitudes Active 30/45/30 Minor Storm 45/25/05 Major-severe storm 15/05/01 B. High Latitudes Active 05/10/15 Minor Storm 15/25/30 Major-severe storm 80/60/35