:Product: 0527RSGA.txt :Issued: 2007 May 27 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 147 Issued at 2200Z on 27 May 2007 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity has been very low. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been quiet to unsettled. 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 to unsettled May 28. There remains the possibility of isolated active periods. The geomagnetic field is expected to be quiet May 29 - 30. III. Event Probabilities 28 May-30 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 27 May 067 Predicted 28 May-30 May 065/065/065 90 Day Mean 27 May 073 V. Geomagnetic A Indices Observed Afr/Ap 26 May 010/016 Estimated Afr/Ap 27 May 010/015 Predicted Afr/Ap 28 May-30 May 006/010-003/005-003/005 VI. Geomagnetic Activity Probabilities 28 May-30 May A. Middle Latitudes Active 20/15/15 Minor storm 10/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 25/20/20 Minor storm 15/10/10 Major-severe storm 10/01/01