:Product: 19961123RSGA.txt :Issued: 1996 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 1996 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 22/2100Z TO 23/2100Z: SOLAR ACTIVITY WAS LOW. REGION 7999 (S04E33) CONTINUED TO GROW IN WHITE LIGHT AND H-ALPHA, WHILE PRODUCING THE ONLY OBSERVED C-CLASS EVENT, A C1/0F AT 0636Z. A SECOND UNSEEN C1 EVENT OCCURRED AT 1546Z. 7999'S EVOLUTION, COUPLED WITH GROWTH IN THE OTHER SPOTTED REGION, 7997 (N05W40), DROVE THE 10.7 CM FLUX TO ITS HIGHEST VALUE SINCE OCTOBER 12, 1995. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE LOW. ADDITIONAL C-CLASS FLARES ARE ANTICIPATED FROM REGION 7999. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 22/2100Z TO 23/2100Z: THE GEOMAGNETIC FIELD WAS QUIET. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED THROUGHOUT THE PERIOD. A RECURRENT HIGH SPEED STREAM IS EXPECTED TO FUEL THIS WEAK DISTURBANCE. III. EVENT PROBABILITIES 24 NOV-26 NOV CLASS M 05/05/05 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 23 NOV 091 PREDICTED 24 NOV-26 NOV 095/095/090 90 DAY MEAN 23 NOV 071 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 22 NOV 004/003 ESTIMATED AFR/AP 23 NOV 004/003 PREDICTED AFR/AP 24 NOV-26 NOV 010/008-015/010-010/010 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 24 NOV-26 NOV A. MIDDLE LATITUDES ACTIVE 10/35/20 MINOR STORM 05/10/10 MAJOR-SEVERE STORM 01/05/05 B. HIGH LATITUDES ACTIVE 10/50/20 MINOR STORM 05/20/10 MAJOR-SEVERE STORM 01/10/05