:Product: 20050124RSGA.txt :Issued: 2005 Jan 24 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Environment Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 024 Issued at 2200Z on 24 Jan 2005 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity decreased to very low levels today. All three spotted active regions were responsible for the low level B-class flare activity reported throughout the period. Region 727 (S09E38) was numbered today and is undergoing rapid growth in penumbral coverage. IB. Solar Activity Forecast: Solar activity is expected to be at very low to low levels. Continued growth in Region 727 may lead to C-class flare activity. IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field was at predominantly quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels throughout the period. III. Event Probabilities 25 Jan-27 Jan Class M 05/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 24 Jan 095 Predicted 25 Jan-27 Jan 095/095/095 90 Day Mean 24 Jan 109 V. Geomagnetic A Indices Observed Afr/Ap 23 Jan 012/017 Estimated Afr/Ap 24 Jan 008/008 Predicted Afr/Ap 25 Jan-27 Jan 006/008-005/008-006/008 VI. Geomagnetic Activity Probabilities 25 Jan-27 Jan A. Middle Latitudes Active 15/15/15 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/20 Minor storm 05/05/05 Major-severe storm 01/01/01