:Product: 0320RSGA.txt :Issued: 2007 Mar 20 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 079 Issued at 2200Z on 20 Mar 2007 IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity was at very low levels. No flare activity was reported during the period. No new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels through 21 and 22 March. Isolated active periods are possible on 23 March due to a recurrent coronal hole high speed stream. Higher latitudes may experience brief periods of minor storm conditions with the onset of the anticipated coronal hole. III. Event Probabilities 21 Mar-23 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 20 Mar 073 Predicted 21 Mar-23 Mar 075/075/075 90 Day Mean 20 Mar 078 V. Geomagnetic A Indices Observed Afr/Ap 19 Mar 001/002 Estimated Afr/Ap 20 Mar 002/005 Predicted Afr/Ap 21 Mar-23 Mar 005/005-005/005-008/010 VI. Geomagnetic Activity Probabilities 21 Mar-23 Mar A. Middle Latitudes Active 15/15/20 Minor storm 01/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/25 Minor storm 01/01/15 Major-severe storm 01/01/05