:Product: 0324RSGA.txt :Issued: 2008 Mar 24 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 084 Issued at 2200Z on 24 Mar 2008 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity was at very low levels. Region 987 (S08E36) has grown in area and spot number over the summary period. New Region 988 (S09E59) was numbered today. Both of these regions are D-type spot groups with beta magnetic configurations. Multiple B-class events have occurred from these regions, as well as a region that is on the east limb. IB. Solar Activity Forecast: Solar activity is expected to be at very low to low levels. There is a chance for isolated C-class flares from Regions 987 and 988. IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field was at quiet levels. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at mostly quiet to unsettled levels on day one (25 March). On days two and three (26 and 27 March) an increase to unsettled to active levels is expected due to a coronal hole high speed stream rotating into a geoeffective position. During this period isolated minor storm levels at middle latitudes and major storm conditions at high latitudes are possible. III. Event Probabilities 25 Mar-27 Mar Class M 05/05/05 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 24 Mar 079 Predicted 25 Mar-27 Mar 080/080/085 90 Day Mean 24 Mar 072 V. Geomagnetic A Indices Observed Afr/Ap 23 Mar 007/008 Estimated Afr/Ap 24 Mar 003/005 Predicted Afr/Ap 25 Mar-27 Mar 010/010-020/025-020/025 VI. Geomagnetic Activity Probabilities 25 Mar-27 Mar A. Middle Latitudes Active 15/30/30 Minor storm 05/15/15 Major-severe storm 01/10/10 B. High Latitudes Active 20/35/35 Minor storm 05/20/20 Major-severe storm 05/15/15