:Product: 20001215RSGA.txt :Issued: 2000 Dec 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 350 Issued at 2200Z on 15 Dec 2000 IA. Analysis of Solar Active Regions and Activity from 14/2100Z to 15/2100Z: Solar activity was low. Maximum activity continues to be sporadic minor C-class events. IB. Solar Activity Forecast: Solar activity is expected to be low, with the chance for an isolated M-class event. IIA. Geophysical Activity Summary 14/2100Z to 15/2100Z: The geomagnetic field has been quiet at all latitudes for the past 24 hours. The greater than 2 MeV flux continued its recent daily fluctuation between low and moderate levels. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be low, with isolated periods of unsettled conditions, for the next three days. III. Event Probabilities 16 Dec-18 Dec Class M 30/30/30 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 15 Dec 188 Predicted 16 Dec-18 Dec 190/190/195 90 Day Mean 15 Dec 176 V. Geomagnetic A Indices Observed Afr/Ap 14 Dec 002/004 Estimated Afr/Ap 15 Dec 003/006 Predicted Afr/Ap 16 Dec-18 Dec 005/008-005/008-005/008 VI. Geomagnetic Activity Probabilities 16 Dec-18 Dec A. Middle Latitudes Active 20/20/20 Minor storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 25/25/25 Minor storm 01/01/01 Major-severe storm 01/01/01