:Product: 0926RSGA.txt :Issued: 2007 Sep 26 2203 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Environment Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 269 Issued at 2200Z on 26 Sep 2007 IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity has been very low. The visible solar disk remains spotless. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled 27 September. Conditions for 28 - 29 September are expected to range from unsettled to active as a coronal hole high speed stream rotates into a geoeffective position. III. Event Probabilities 27 Sep-29 Sep Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 26 Sep 070 Predicted 27 Sep-29 Sep 067/067/067 90 Day Mean 26 Sep 069 V. Geomagnetic A Indices Observed Afr/Ap 25 Sep 005/006 Estimated Afr/Ap 26 Sep 004/004 Predicted Afr/Ap 27 Sep-29 Sep 006/008-012/015-015/025 VI. Geomagnetic Activity Probabilities 27 Sep-29 Sep A. Middle Latitudes Active 15/40/40 Minor storm 05/15/15 Major-severe storm 01/05/05 B. High Latitudes Active 20/45/45 Minor storm 10/20/20 Major-severe storm 01/10/10