:Product: 0321RSGA.txt :Issued: 2007 Mar 21 2203 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 080 Issued at 2200Z on 21 Mar 2007 IA. Analysis of Solar Active Regions and Activity from 20/2100Z to 21/2100Z: Solar activity was very low. No flares were observed during the past 24 hours, and no new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 20/2100Z to 21/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit remained at high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the next three days (22-24 March). Isolated active periods are possible on 23-24 March, with a slight chance for minor storm conditions at high latitudes, due to a coronal hole high speed stream. III. Event Probabilities 22 Mar-24 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 21 Mar 073 Predicted 22 Mar-24 Mar 075/075/075 90 Day Mean 21 Mar 078 V. Geomagnetic A Indices Observed Afr/Ap 20 Mar 001/002 Estimated Afr/Ap 21 Mar 003/005 Predicted Afr/Ap 22 Mar-24 Mar 005/005-008/008-008/008 VI. Geomagnetic Activity Probabilities 22 Mar-24 Mar A. Middle Latitudes Active 15/20/20 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/25/25 Minor storm 05/10/10 Major-severe storm 01/01/01