:Product: 0817RSGA.txt :Issued: 2007 Aug 17 2202 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 229 Issued at 2200Z on 17 Aug 2007 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity continues at very low levels. There was no significant activity observed this period. IB. Solar Activity Forecast: Solar activity is expected to continue at very low levels. IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was quiet. Solar wind speed decreased to less than 400 km/s. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled. A coronal hole is expected to result in occasional unsettled periods on 19 Aug. III. Event Probabilities 18 Aug-20 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 17 Aug 068 Predicted 18 Aug-20 Aug 065/065/070 90 Day Mean 17 Aug 072 V. Geomagnetic A Indices Observed Afr/Ap 16 Aug 006/007 Estimated Afr/Ap 17 Aug 005/005 Predicted Afr/Ap 18 Aug-20 Aug 005/005-008/012-005/005 VI. Geomagnetic Activity Probabilities 18 Aug-20 Aug A. Middle Latitudes Active 15/20/15 Minor storm 01/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/25/20 Minor storm 05/05/05 Major-severe storm 01/01/01