:Product: 0919RSGA.txt :Issued: 2007 Sep 19 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 262 Issued at 2200Z on 19 Sep 2007 IA. Analysis of Solar Active Regions and Activity from 18/2100Z to 19/2100Z: Solar activity was very low. The visible disk remained spotless. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 18/2100Z to 19/2100Z: The geomagnetic field was quiet IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled on 20 September and mostly unsettled on 21 September as a recurrent coronal hole becomes geoeffective. Conditions are expected to remain unsettled to active, with a chance for minor storm periods at high latitudes, on 22 September. III. Event Probabilities 20 Sep-22 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 19 Sep 067 Predicted 20 Sep-22 Sep 067/070/070 90 Day Mean 19 Sep 069 V. Geomagnetic A Indices Observed Afr/Ap 18 Sep 002/003 Estimated Afr/Ap 19 Sep 004/005 Predicted Afr/Ap 20 Sep-22 Sep 005/008-008/008-015/015 VI. Geomagnetic Activity Probabilities 20 Sep-22 Sep A. Middle Latitudes Active 05/15/35 Minor storm 01/10/10 Major-severe storm 01/05/10 B. High Latitudes Active 05/15/35 Minor storm 05/10/15 Major-severe storm 01/05/10