:Product: 0810RSGA.txt :Issued: 2010 Aug 10 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 222 Issued at 2200Z on 10 Aug 2010 IA. Analysis of Solar Active Regions and Activity from 09/2100Z to 10/2100Z: Solar activity was very low. Three B-class flares were observed during the period, including a long-duration B8 flare at 10/1701Z from new Region 1097 (N33E71). Region 1096 (N21W33) showed an increase in spot count as well as areal coverage, and was classified as a Cri group with a beta magnetic configuration. IB. Solar Activity Forecast: Solar activity is expected to be very low with a chance for a C-class flare from Region 1096. IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z: Geomagnetic field activity was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today. IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be quiet to unsettled, with an isolated active period possible, on day one (11 August) due to effects of the full-halo CME observed on 07 August. Quiet levels are expected on days two and three (12-13 August.) III. Event Probabilities 11 Aug-13 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 10 Aug 084 Predicted 11 Aug-13 Aug 084/084/085 90 Day Mean 10 Aug 076 V. Geomagnetic A Indices Observed Afr/Ap 09 Aug 007/010 Estimated Afr/Ap 10 Aug 008/008 Predicted Afr/Ap 11 Aug-13 Aug 010/012-005/005-005/005 VI. Geomagnetic Activity Probabilities 11 Aug-13 Aug A. Middle Latitudes Active 20/10/10 Minor storm 05/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 30/15/10 Minor storm 10/01/01 Major-severe storm 01/01/01