:Product: 0607RSGA.txt :Issued: 2026 Jun 07 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 158 Issued at 2200Z on 07 Jun 2026 IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 8 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 (08 Jun, 09 Jun, 10 Jun). IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 631 km/s at 06/2250Z. Total IMF reached 5 nT at 07/1317Z. The maximum southward component of Bz reached -4 nT at 07/1341Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2874 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to severe storm levels on day one (08 Jun), unsettled to major storm levels on day two (09 Jun) and quiet to active levels on day three (10 Jun). Protons greater than 10 Mev have a chance of crossing threshold on day one (08 Jun). III. Event probabilities 08 Jun-10 Jun Class M 55/55/55 Class X 10/10/10 Proton 25/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 07 Jun 134 Predicted 08 Jun-10 Jun 135/132/130 90 Day Mean 07 Jun 125 V. Geomagnetic A Indices Observed Afr/Ap 06 Jun 019/017 Estimated Afr/Ap 07 Jun 008/009 Predicted Afr/Ap 08 Jun-10 Jun 030/050-025/032-009/012 VI. Geomagnetic Activity Probabilities 08 Jun-10 Jun A. Middle Latitudes Active 15/25/30 Minor Storm 35/35/10 Major-severe storm 50/30/01 B. High Latitudes Active 05/05/15 Minor Storm 10/15/30 Major-severe storm 85/79/40