:Product: 20010127RSGA.txt :Issued: 2001 Jan 27 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 027 Issued at 2200Z on 27 Jan 2001 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity decreased to low levels. Isolated, low-level C-class subflares occurred. Minor spot growth was reported in Regions 9321 (S05W10) and 9325 (N11E37). The remaining regions were simply-structured and stable including newly numbered Region 9327 (N17E47). IB. Solar Activity Forecast: Solar activity is expected to remain at low levels. IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: Geomagnetic field activity was at mostly quiet levels. IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to remain at mostly quiet levels. III. Event Probabilities 28 Jan-30 Jan Class M 30/30/30 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 27 Jan 167 Predicted 28 Jan-30 Jan 165/165/160 90 Day Mean 27 Jan 174 V. Geomagnetic A Indices Observed Afr/Ap 26 Jan 009/010 Estimated Afr/Ap 27 Jan 005/004 Predicted Afr/Ap 28 Jan-30 Jan 007/004-007/004-007/005 VI. Geomagnetic Activity Probabilities 28 Jan-30 Jan A. Middle Latitudes Active 20/20/20 Minor storm 10/10/10 Major-severe storm 05/05/05 B. High Latitudes Active 20/20/20 Minor storm 10/10/10 Major-severe storm 05/05/05