:Product: 1126RSGA.txt :Issued: 2008 Nov 26 2200 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 331 Issued at 2200Z on 26 Nov 2008 IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was very low. No flares were observed during the past 24 hours. The visible disk was spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field ranged from quiet to active conditions. Solar wind observations from the ACE spacecraft indicated a continued influence of the coronal hole high speed stream. Solar wind velocities reached a maximum of 651 km/s near the end of the period. The Interplanetary Magnetic Field (IMF) Bt ranged from +6 to -5. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled on 26 November. Quiet conditions should return on 26-27 November as the high speed solar stream subsides. III. Event Probabilities 27 Nov-29 Nov Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 26 Nov 068 Predicted 27 Nov-29 Nov 069/069/069 90 Day Mean 26 Nov 068 V. Geomagnetic A Indices Observed Afr/Ap 25 Nov 011/010 Estimated Afr/Ap 26 Nov 010/012 Predicted Afr/Ap 27 Nov-29 Nov 007/008-005/005-005/005 VI. Geomagnetic Activity Probabilities 27 Nov-29 Nov A. Middle Latitudes Active 15/05/05 Minor storm 05/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/05/05 Minor storm 10/01/01 Major-severe storm 01/01/01