:Product: 0826RSGA.txt :Issued: 2009 Aug 26 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 238 Issued at 2200Z on 26 Aug 2009 IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was very low. No flares were detected. The visible disk was spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: Geomagnetic field activity was at mostly quiet levels. One isolated unsettled period was observed between 26/0000 - 0300Z. IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be quiet to unsettled on days one and two (27 - 28 August), due to effects from a coronal hole. Quiet conditions are expected on day three (29 August). III. Event Probabilities 27 Aug-29 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 26 Aug 067 Predicted 27 Aug-29 Aug 068/068/068 90 Day Mean 26 Aug 068 V. Geomagnetic A Indices Observed Afr/Ap 25 Aug 002/003 Estimated Afr/Ap 26 Aug 005/005 Predicted Afr/Ap 27 Aug-29 Aug 005/005-005/005-005/005 VI. Geomagnetic Activity Probabilities 27 Aug-29 Aug A. Middle Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 05/05/05 Minor storm 01/01/01 Major-severe storm 01/01/01