:Product: 0905RSGA.txt :Issued: 2008 Sep 05 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 249 Issued at 2200Z on 05 Sep 2008 IA. Analysis of Solar Active Regions and Activity from 04/2100Z to 05/2100Z: Solar activity was very low. No flares occurred during the past 24 hours and the solar disk continues to be spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 04/2100Z to 05/2100Z: The geomagnetic field was predominantly quiet during the past 24 hours, with the exception of an unsettled period from 0300-0600Z. Solar wind observations at ACE show a generally declining trend in the solar wind velocity with values around 500 km/s at the end of the period. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled for the next two days (06-07 September). Activity is expected to decrease to quiet levels for the third day (08 September). III. Event Probabilities 06 Sep-08 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 05 Sep 065 Predicted 06 Sep-08 Sep 066/066/066 90 Day Mean 05 Sep 066 V. Geomagnetic A Indices Observed Afr/Ap 04 Sep 017/033 Estimated Afr/Ap 05 Sep 007/010 Predicted Afr/Ap 06 Sep-08 Sep 007/010-005/008-005/005 VI. Geomagnetic Activity Probabilities 06 Sep-08 Sep A. Middle Latitudes Active 10/05/05 Minor storm 05/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/10/05 Minor storm 10/05/01 Major-severe storm 05/01/01