:Product: 0913RSGA.txt :Issued: 2007 Sep 13 2203 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 256 Issued at 2200Z on 13 Sep 2007 IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: Solar activity was very low. The visible disk remains spotless. IB. Solar Activity Forecast: Solar activity is expected to continue at very low levels. IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: The geomagnetic field was quiet. Solar wind speed remains below 300 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. Isolated unsettled periods are possible on 14 September. III. Event Probabilities 14 Sep-16 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 13 Sep 066 Predicted 14 Sep-16 Sep 067/067/067 90 Day Mean 13 Sep 069 V. Geomagnetic A Indices Observed Afr/Ap 12 Sep 002/002 Estimated Afr/Ap 13 Sep 002/001 Predicted Afr/Ap 14 Sep-16 Sep 005/008-005/005-005/005 VI. Geomagnetic Activity Probabilities 14 Sep-16 Sep A. Middle Latitudes Active 10/10/05 Minor storm 05/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/10 Minor storm 10/05/05 Major-severe storm 01/01/01