:Product: 20041115RSGA.txt :Issued: 2004 Nov 15 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 320 Issued at 2200Z on 15 Nov 2004 IA. Analysis of Solar Active Regions and Activity from 14/2100Z to 15/2100Z: Solar activity remained at low levels today. Region 700 (N04W53) produced two C-class flares during the period, a C1.2 that occurred at 15/0626Z and a C1.5 occurring at 15/0925Z. Magnetic analysis indicates that the region continues to carry a beta-gamma classification while the sunspot area has more than doubled since yesterday. Regions 699 (S13W10) and 701 (S15E17) underwent a slight growth in magnetic structure although neither of these groups showed any appreciable change in sunspot coverage. No new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to be at low levels. Region 700 has a slight chance of producing an isolated M-class flare based on the magnetic structure of the region. IIA. Geophysical Activity Summary 14/2100Z to 15/2100Z: The geomagnetic field was at quiet levels today. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today. The greater than 10 MeV proton flux at geosynchronous orbit was slightly elevated today as the flux continues to drop to background levels from the activity that ended on 13 November. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels throughout the period. III. Event Probabilities 16 Nov-18 Nov Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 15 Nov 106 Predicted 16 Nov-18 Nov 110/115/120 90 Day Mean 15 Nov 107 V. Geomagnetic A Indices Observed Afr/Ap 14 Nov 007/009 Estimated Afr/Ap 15 Nov 003/005 Predicted Afr/Ap 16 Nov-18 Nov 005/008-004/008-004/008 VI. Geomagnetic Activity Probabilities 16 Nov-18 Nov A. Middle Latitudes Active 15/10/10 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/20 Minor storm 05/05/05 Major-severe storm 01/01/01