:Product: 0120RSGA.txt :Issued: 2007 Jan 20 2204 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 020 Issued at 2200Z on 20 Jan 2007 IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity was very low. New Region 939 (S03W17) was numbered today. IB. Solar Activity Forecast: Solar activity is expected to be very low with isolated C-flare activity possible from Region 939. IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field was quiet to unsettled. Solar wind speed at ACE has decreased from approximately 650 km/s to 580 km/s. 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 quiet to unsettled. III. Event Probabilities 21 Jan-23 Jan Class M 01/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 20 Jan 079 Predicted 21 Jan-23 Jan 080/080/080 90 Day Mean 20 Jan 084 V. Geomagnetic A Indices Observed Afr/Ap 19 Jan 009/011 Estimated Afr/Ap 20 Jan 008/008 Predicted Afr/Ap 21 Jan-23 Jan 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 21 Jan-23 Jan A. Middle Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01