:Product: 20000114RSGA.txt :Issued: 2000 Jan 14 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 014 ISSUED AT 2200Z ON 14 JAN 2000 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 13/2100Z TO 14/2100Z: SOLAR ACTIVITY WAS LOW. ONLY 4 C-CLASS EVENTS WERE NOTED. THE MOST ACTIVE REGION WAS 8827 (S12W58) WHICH HAS SHOWN SIGNIFICANT GROWTH IN THE LAST 24 HOURS AND ALSO PRODUCED THE LARGEST EVENT OF THE PERIOD, A C6/SF AT 14/1711UT. THE MOST COMPLEX REGION REMAINS 8824 (S13E08) WHICH CONTINUES TO SHOW A BETA-GAMMA-DELTA MAGNETIC CLASSIFICATION. REGION 8824 SHOWED STRONG PLAGE FLUCTUATION DURING THE PERIOD BUT ONLY PRODUCED A SINGLE OPTICAL SUBFLARE. REGION 8829 (N17E40) ALSO SHOWED PLAGE FLUCTUATIONS AND POINT BRIGHTENINGS DURING THE PERIOD. THE REST OF THE REGIONS SHOWED LITTLE CHANGE OF ACTIVITY. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. REGIONS 8824 AND 8829 ARE BOTH POTENTIAL SOURCES FOR ISOLATED M AND POSSIBLY X-CLASS FLARES. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 13/2100Z TO 14/2100Z: THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO CONTINUE TO BE QUIET TO UNSETTLED. III. EVENT PROBABILITIES 15 JAN-17 JAN CLASS M 50/50/50 CLASS X 10/10/10 PROTON 05/05/05 PCAF YELLOW IV. PENTICTON 10.7 CM FLUX OBSERVED 14 JAN 201 PREDICTED 15 JAN-17 JAN 210/215/215 90 DAY MEAN 14 JAN 176 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 13 JAN 009/010 ESTIMATED AFR/AP 14 JAN 005/005 PREDICTED AFR/AP 15 JAN-17 JAN 005/005-005/005-005/005 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 15 JAN-17 JAN A. MIDDLE LATITUDES ACTIVE 15/15/15 MINOR STORM 01/01/01 MAJOR-SEVERE STORM 01/01/01 B. HIGH LATITUDES ACTIVE 30/30/30 MINOR STORM 05/05/05 MAJOR-SEVERE STORM 01/01/01