:Product: 0621RSGA.txt :Issued: 2008 Jun 21 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 173 Issued at 2200Z on 21 Jun 2008 IA. Analysis of Solar Active Regions and Activity from 20/2100Z to 21/2100Z: Solar activity was at very low levels. Region 999 (S02W08) remained stable over the period. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. IIA. Geophysical Activity Summary 20/2100Z to 21/2100Z: The geomagnetic field was at mostly quiet levels. Solar wind velocities gradually decayed from a peak of near 600 km/s at the beginning of the period to about 500 km/s at forecast issue time. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at mostly quiet levels for the forecast period (22 to 24 June). III. Event Probabilities 22 Jun-24 Jun Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 21 Jun 065 Predicted 22 Jun-24 Jun 065/065/065 90 Day Mean 21 Jun 070 V. Geomagnetic A Indices Observed Afr/Ap 20 Jun 008/011 Estimated Afr/Ap 21 Jun 007/005 Predicted Afr/Ap 22 Jun-24 Jun 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 22 Jun-24 Jun A. Middle Latitudes Active 10/10/10 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/10/10 Minor storm 05/05/05 Major-severe storm 01/01/01