:Product: 0529RSGA.txt :Issued: 2026 May 29 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 149 Issued at 2200Z on 29 May 2026 IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: 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 on days one, two, and three (30 May, 31 May, 01 Jun). IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 482 km/s at 28/2140Z. Total IMF reached 8 nT at 29/1712Z. The maximum southward component of Bz reached -8 nT at 29/1604Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 565 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (30 May, 31 May) and quiet to unsettled levels on day three (01 Jun). III. Event probabilities 30 May-01 Jun Class M 40/40/40 Class X 05/05/05 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 29 May 148 Predicted 30 May-01 Jun 145/142/138 90 Day Mean 29 May 125 V. Geomagnetic A Indices Observed Afr/Ap 28 May 013/013 Estimated Afr/Ap 29 May 010/013 Predicted Afr/Ap 30 May-01 Jun 009/010-011/015-010/012 VI. Geomagnetic Activity Probabilities 30 May-01 Jun A. Middle Latitudes Active 25/30/20 Minor Storm 05/10/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/15 Minor Storm 35/35/25 Major-severe storm 30/35/30