:Product: 20041117RSGA.txt :Issued: 2004 Nov 17 2200 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 322 Issued at 2200Z on 17 Nov 2004 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity decreased to very low levels today. Region 700 (N04W80) was in steady decay today as it began to rotate off the west solar limb. Flare production was limited to B-class flare activity today. Region 702 (S10W27) is a rapidly developing magnetic beta group that was numbered today. IB. Solar Activity Forecast: Solar activity is expected to be at very low to low levels. IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field was at quiet to unsettled levels today. An isolated active period was observed at middle latitudes between 17/0600 and 0900Z. 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 through 18 and 19 November. Isolated active conditions may occur on 20 November in response to an anticipated coronal hole. III. Event Probabilities 18 Nov-20 Nov Class M 10/05/05 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 17 Nov 105 Predicted 18 Nov-20 Nov 110/110/110 90 Day Mean 17 Nov 107 V. Geomagnetic A Indices Observed Afr/Ap 16 Nov 005/008 Estimated Afr/Ap 17 Nov 004/007 Predicted Afr/Ap 18 Nov-20 Nov 004/008-002/008-008/012 VI. Geomagnetic Activity Probabilities 18 Nov-20 Nov A. Middle Latitudes Active 15/15/20 Minor storm 01/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/25 Minor storm 05/05/10 Major-severe storm 01/01/05