:Product: 20041123RSGA.txt :Issued: 2004 Nov 23 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 328 Issued at 2200Z on 23 Nov 2004 IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: Solar activity was low. Two C-class events were observed today. Both of these events were visible in the GOES-12 SXI images approaching the east solar limb. A new region was numbered today as Region 705 (S04W64). IB. Solar Activity Forecast: Solar activity is expected to be low. An isolated M-class event is possible with the return of Region 693 (S17,L=074), 698 (S09,L=062), and 696 (N08,L=026). These regions are due to return to the visible disk between 23-26 November. IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels today. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled. Isolated active periods are possible on 25-26 November due to the influence of a recurrent coronal hole high speed solar wind stream. III. Event Probabilities 24 Nov-26 Nov Class M 15/15/15 Class X 05/05/05 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 23 Nov 107 Predicted 24 Nov-26 Nov 115/120/125 90 Day Mean 23 Nov 106 V. Geomagnetic A Indices Observed Afr/Ap 22 Nov 006/010 Estimated Afr/Ap 23 Nov 005/005 Predicted Afr/Ap 24 Nov-26 Nov 005/008-008/010-010/015 VI. Geomagnetic Activity Probabilities 24 Nov-26 Nov A. Middle Latitudes Active 10/15/20 Minor storm 01/05/10 Major-severe storm 01/01/05 B. High Latitudes Active 15/20/25 Minor storm 05/10/10 Major-severe storm 01/05/05