:Product: 0727RSGA.txt :Issued: 2025 Jul 27 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 208 Issued at 2200Z on 27 Jul 2025 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: 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 (28 Jul, 29 Jul, 30 Jul). IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 529 km/s at 27/0347Z. Total IMF reached 11 nT at 27/0033Z. The maximum southward component of Bz reached 0 nT at 27/1731Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1686 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (28 Jul, 29 Jul, 30 Jul). III. Event probabilities 28 Jul-30 Jul Class M 30/30/30 Class X 05/05/05 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 27 Jul 145 Predicted 28 Jul-30 Jul 145/145/140 90 Day Mean 27 Jul 135 V. Geomagnetic A Indices Observed Afr/Ap 26 Jul 011/012 Estimated Afr/Ap 27 Jul 007/009 Predicted Afr/Ap 28 Jul-30 Jul 010/010-006/008-008/010 VI. Geomagnetic Activity Probabilities 28 Jul-30 Jul A. Middle Latitudes Active 25/15/25 Minor Storm 10/05/10 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/25/30 Major-severe storm 35/25/35