:Product: 1004RSGA.txt :Issued: 2008 Oct 04 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 278 Issued at 2200Z on 04 Oct 2008 IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity was very low. New Region 1003 (S23E28) was numbered today. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic field was at quiet to unsettled levels with isolated minor storm conditions observed for the period of 04/0600Z. Although velocities reflect a gradual decrease, to around 570 km/s, solar wind observations from the ACE spacecraft indicate a continued influence from the high speed solar wind stream. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels for 05 October. Mostly quiet conditions should return for 06-07 October as the high speed solar wind stream subsides. III. Event Probabilities 05 Oct-07 Oct Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 04 Oct 067 Predicted 05 Oct-07 Oct 066/066/066 90 Day Mean 04 Oct 066 V. Geomagnetic A Indices Observed Afr/Ap 03 Oct 010/013 Estimated Afr/Ap 04 Oct 010/010 Predicted Afr/Ap 05 Oct-07 Oct 007/008-005/005-005/005 VI. Geomagnetic Activity Probabilities 05 Oct-07 Oct A. Middle Latitudes Active 10/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 10/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01