:Product: 0524RSGA.txt :Issued: 2025 May 24 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 144 Issued at 2200Z on 24 May 2025 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity has been at moderate levels for the past 24 hours. There are currently 8 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 (25 May, 26 May, 27 May). IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 474 km/s at 24/0127Z. Total IMF reached 10 nT at 24/1600Z. The maximum southward component of Bz reached -6 nT at 24/1052Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1268 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (25 May, 26 May, 27 May). III. Event probabilities 25 May-27 May Class M 25/25/25 Class X 05/05/05 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 24 May 130 Predicted 25 May-27 May 135/140/135 90 Day Mean 24 May 156 V. Geomagnetic A Indices Observed Afr/Ap 23 May 008/007 Estimated Afr/Ap 24 May 007/008 Predicted Afr/Ap 25 May-27 May 009/008-009/008-008/008 VI. Geomagnetic Activity Probabilities 25 May-27 May A. Middle Latitudes Active 20/20/20 Minor Storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/25/25 Major-severe storm 30/30/30