:Product: 0602RSGA.txt :Issued: 2026 Jun 02 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 153 Issued at 2200Z on 02 Jun 2026 IA. Analysis of Solar Active Regions and Activity from 01/2100Z to 02/2100Z: Solar activity has been at moderate 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 and a slight chance for an X-class flare on days one, two, and three (03 Jun, 04 Jun, 05 Jun). IIA. Geophysical Activity Summary 01/2100Z to 02/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 426 km/s at 02/0559Z. Total IMF reached 8 nT at 01/2159Z. The maximum southward component of Bz reached -6 nT at 01/2341Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 684 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (03 Jun) and quiet to active levels on days two and three (04 Jun, 05 Jun). III. Event probabilities 03 Jun-05 Jun Class M 50/50/50 Class X 10/10/10 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 02 Jun 146 Predicted 03 Jun-05 Jun 150/152/145 90 Day Mean 02 Jun 125 V. Geomagnetic A Indices Observed Afr/Ap 01 Jun 009/009 Estimated Afr/Ap 02 Jun 006/007 Predicted Afr/Ap 03 Jun-05 Jun 009/010-011/014-010/012 VI. Geomagnetic Activity Probabilities 03 Jun-05 Jun A. Middle Latitudes Active 30/35/35 Minor Storm 10/15/15 Major-severe storm 01/01/01 B. High Latitudes Active 15/10/15 Minor Storm 30/30/35 Major-severe storm 30/50/40