:Product: 0523RSGA.txt :Issued: 2026 May 23 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 143 Issued at 2200Z on 23 May 2026 IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 6 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 (24 May, 25 May, 26 May). IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 383 km/s at 22/2223Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 4016 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (24 May, 25 May) and quiet to unsettled levels on day three (26 May). III. Event probabilities 24 May-26 May Class M 35/35/35 Class X 05/05/05 Proton 05/05/05 PCAF green IV. Penticton 10.7 cm Flux Observed 23 May 137 Predicted 24 May-26 May 140/145/145 90 Day Mean 23 May 124 V. Geomagnetic A Indices Observed Afr/Ap 22 May 005/006 Estimated Afr/Ap 23 May 004/004 Predicted Afr/Ap 24 May-26 May 006/005-005/005-008/008 VI. Geomagnetic Activity Probabilities 24 May-26 May A. Middle Latitudes Active 10/10/15 Minor Storm 05/05/10 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/20 Minor Storm 20/20/25 Major-severe storm 20/15/20