:Product: 0524RSGA.txt :Issued: 2008 May 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 145 Issued at 2200Z on 24 May 2008 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity was very low. The visible disk remains spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field was quiet to unsettled during the past 24 hours. Solar wind velocities at ACE ranged between 450-580 km/s today. 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, with a chance for isolated active conditions at high latitudes, for the next three days (25-27 May). III. Event Probabilities 25 May-27 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 24 May 069 Predicted 25 May-27 May 068/068/068 90 Day Mean 24 May 071 V. Geomagnetic A Indices Observed Afr/Ap 23 May 007/010 Estimated Afr/Ap 24 May 007/010 Predicted Afr/Ap 25 May-27 May 008/010-005/008-005/008 VI. Geomagnetic Activity Probabilities 25 May-27 May A. Middle Latitudes Active 20/15/15 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 30/25/25 Minor storm 10/10/10 Major-severe storm 05/01/01