:Product: 0317RSGA.txt :Issued: 2008 Mar 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 077 Issued at 2200Z on 17 Mar 2008 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity was at very low levels. Region 986 (S04W71) has decayed to a single alpha spot. A slow-moving coronal mass ejection was observed off the west limb at 17/0830Z. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at mostly quiet levels throughout the forecast period (18 - 20 March). The CME observed today is not expected to be geoeffective. III. Event Probabilities 18 Mar-20 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 17 Mar 070 Predicted 18 Mar-20 Mar 070/070/070 90 Day Mean 17 Mar 072 V. Geomagnetic A Indices Observed Afr/Ap 16 Mar 004/005 Estimated Afr/Ap 17 Mar 003/005 Predicted Afr/Ap 18 Mar-20 Mar 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 18 Mar-20 Mar A. Middle Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01