:Product: 0425RSGA.txt :Issued: 2008 Apr 25 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 116 Issued at 2200Z on 25 Apr 2008 IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low. The disk was spotless. A nine degree filament, located at S10W18, disappeared between 24/1633Z and 25/0524Z. IB. Solar Activity Forecast: Solar activity is expected to remain very low. IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels again today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at predominately quiet levels for the next three days (26 - 28 April). III. Event Probabilities 26 Apr-28 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 25 Apr 070 Predicted 26 Apr-28 Apr 070/070/070 90 Day Mean 25 Apr 072 V. Geomagnetic A Indices Observed Afr/Ap 24 Apr 013/018 Estimated Afr/Ap 25 Apr 008/012 Predicted Afr/Ap 26 Apr-28 Apr 005/008-005/005-005/005 VI. Geomagnetic Activity Probabilities 26 Apr-28 Apr A. Middle Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01