:Product: 0825RSGA.txt :Issued: 2019 Aug 25 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 237 Issued at 2200Z on 25 Aug 2019 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (26 Aug, 27 Aug, 28 Aug). IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 999 km/s at 25/1526Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 404 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (26 Aug, 27 Aug) and quiet to unsettled levels on day three (28 Aug). III. Event probabilities 26 Aug-28 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 25 Aug 066 Predicted 26 Aug-28 Aug 067/067/067 90 Day Mean 25 Aug 068 V. Geomagnetic A Indices Observed Afr/Ap 24 Aug 005/004 Estimated Afr/Ap 25 Aug 004/004 Predicted Afr/Ap 26 Aug-28 Aug 007/010-014/016-008/008 VI. Geomagnetic Activity Probabilities 26 Aug-28 Aug A. Middle Latitudes Active 35/35/25 Minor Storm 05/10/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/15/15 Minor Storm 35/20/15 Major-severe storm 35/30/05