:Product: 0528RSGA.txt :Issued: 2007 May 28 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 148 Issued at 2200Z on 28 May 2007 IA. Analysis of Solar Active Regions and Activity from 27/2100Z to 28/2100Z: Solar activity has been very low. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z: The geomagnetic field has been predominately quiet. 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 quiet May 29 - 31. III. Event Probabilities 29 May-31 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 28 May 069 Predicted 29 May-31 May 065/065/065 90 Day Mean 28 May 073 V. Geomagnetic A Indices Observed Afr/Ap 27 May 010/012 Estimated Afr/Ap 28 May 004/005 Predicted Afr/Ap 29 May-31 May 003/005-003/005-002/005 VI. Geomagnetic Activity Probabilities 29 May-31 May A. Middle Latitudes Active 15/15/15 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/20 Minor storm 10/10/10 Major-severe storm 01/01/01