:Product: 0417RSGA.txt :Issued: 2008 Apr 17 2203 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 108 Issued at 2200Z on 17 Apr 2008 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity was very low. No flares occurred during the past 24 hours. Region 990 (N27W21) continues to be an area of spotless plage. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was quiet to unsettled. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be mostly quiet. III. Event Probabilities 18 Apr-20 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 17 Apr 069 Predicted 18 Apr-20 Apr 070/070/075 90 Day Mean 17 Apr 072 V. Geomagnetic A Indices Observed Afr/Ap 16 Apr 009/015 Estimated Afr/Ap 17 Apr 007/010 Predicted Afr/Ap 18 Apr-20 Apr 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 18 Apr-20 Apr A. Middle Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01