:Product: 0819RSGA.txt :Issued: 2007 Aug 19 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 231 Issued at 2200Z on 19 Aug 2007 IA. Analysis of Solar Active Regions and Activity from 18/2100Z to 19/2100Z: Solar activity has been very low. IB. Solar Activity Forecast: Solar activity is expected to be very low to low. IIA. Geophysical Activity Summary 18/2100Z to 19/2100Z: The geomagnetic field was quiet. The Boulder magnetometer recorded one unsettled period. Solar wind speed remains elevated to approximately 380 km/s. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the forecast period, 20 - 22 August. Isolated active periods may be seen on August 22. III. Event Probabilities 20 Aug-22 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 19 Aug 068 Predicted 20 Aug-22 Aug 070/070/070 90 Day Mean 19 Aug 071 V. Geomagnetic A Indices Observed Afr/Ap 18 Aug 001/004 Estimated Afr/Ap 19 Aug 004/008 Predicted Afr/Ap 20 Aug-22 Aug 004/005-004/005-006/010 VI. Geomagnetic Activity Probabilities 20 Aug-22 Aug A. Middle Latitudes Active 15/15/20 Minor storm 01/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/25 Minor storm 05/05/10 Major-severe storm 01/01/01