:Product: 0802RSGA.txt :Issued: 2010 Aug 02 2201 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 214 Issued at 2200Z on 02 Aug 2010 IA. Analysis of Solar Active Regions and Activity from 01/2100Z to 02/2100Z: Solar activity was very low. Two B-class flares were observed, one of which was produced by Region 1092 (N16E10). Region 1092 showed a minor increase in spot count during the period and was classified as a Cho group with a beta magnetic configuration. No new regions were assigned. IB. Solar Activity Forecast: Solar activity is expected to be very low. However, there will be a chance for an isolated C-class flare from Region 1092. IIA. Geophysical Activity Summary 01/2100Z to 02/2100Z: Geomagnetic field activity was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit was high throughout the period. IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be at unsettled to active levels on day 1 (03 August) due to the arrival of the first of two CMEs observed on 01 August (this CME was associated with the long-duration C3/Sf flare at 01/0826Z). Activity is expected to be at active to minor storm levels with a slight chance for major storm on days 2 - 3 (04 - 05 August) due to the arrival of the second slower CME observed on 01 August (associated with a large filament disappearance). III. Event Probabilities 03 Aug-05 Aug Class M 05/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 02 Aug 079 Predicted 03 Aug-05 Aug 080/082/084 90 Day Mean 02 Aug 075 V. Geomagnetic A Indices Observed Afr/Ap 01 Aug 002/004 Estimated Afr/Ap 02 Aug 003/005 Predicted Afr/Ap 03 Aug-05 Aug 012/012-018/022-020/025 VI. Geomagnetic Activity Probabilities 03 Aug-05 Aug A. Middle Latitudes Active 20/40/50 Minor storm 05/20/25 Major-severe storm 01/05/10 B. High Latitudes Active 25/45/40 Minor storm 10/25/35 Major-severe storm 01/10/15