:Product: 0530RSGA.txt :Issued: 2026 May 30 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 150 Issued at 2200Z on 30 May 2026 IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: 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 (31 May, 01 Jun, 02 Jun). IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 576 km/s at 30/2021Z. Total IMF reached 11 nT at 30/1338Z. The maximum southward component of Bz reached -10 nT at 30/1744Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 408 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (31 May, 01 Jun) and quiet levels on day three (02 Jun). III. Event probabilities 31 May-02 Jun Class M 40/40/40 Class X 05/05/05 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 30 May 142 Predicted 31 May-02 Jun 142/140/136 90 Day Mean 30 May 125 V. Geomagnetic A Indices Observed Afr/Ap 29 May 016/015 Estimated Afr/Ap 30 May 010/012 Predicted Afr/Ap 31 May-02 Jun 013/016-010/012-006/006 VI. Geomagnetic Activity Probabilities 31 May-02 Jun A. Middle Latitudes Active 30/30/10 Minor Storm 10/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 30/30/20 Major-severe storm 40/35/20