:Product: 0918RSGA.txt :Issued: 2007 Sep 18 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 261 Issued at 2200Z on 18 Sep 2007 IA. Analysis of Solar Active Regions and Activity from 17/2100Z to 18/2100Z: Solar activity was very low. The visible disk remains spotless. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z: The geomagnetic field was quiet. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet 19 September and quiet to unsettled 20 - 21 September. III. Event Probabilities 19 Sep-21 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 18 Sep 067 Predicted 19 Sep-21 Sep 067/067/070 90 Day Mean 18 Sep 070 V. Geomagnetic A Indices Observed Afr/Ap 17 Sep 001/002 Estimated Afr/Ap 18 Sep 003/004 Predicted Afr/Ap 19 Sep-21 Sep 003/005-006/008-006/008 VI. Geomagnetic Activity Probabilities 19 Sep-21 Sep A. Middle Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor storm 10/10/10 Major-severe storm 01/01/01