:Product: 19960607RSGA.txt :Issued: 1996 Jun 07 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 159 ISSUED AT 2200Z ON 07 JUN 1996 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 06/2100Z TO 07/2100Z: SOLAR ACTIVITY WAS VERY LOW. REGION 7968 (N02W15), THE ONLY ACTIVE REGION CURRENTLY ON THE VISIBLE DISK, HAS GROWN SIGNIFICANTLY IN BOTH SIZE AND NUMBER OF SPOTS SINCE YESTERDAY. THIS REGION HAS PRODUCED THREE B-CLASS FLARES IN THE LAST 24 HOURS, ONE AT 0956Z OPTICALLY CORRELATED AS A SUB- FLARE. THE LARGE TWELVE DEGREE FILAMENT LOCATED AT N06E24 INCREASED IN WIDTH, LENGTH, AND DENSITY SINCE YESTERDAY, BUT REMAINS RELATIVELY MOTIONLESS. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW, WITH A 60% CHANCE FOR A C-CLASS EVENT AND 10% CHANCE OF AN M-CLASS EVENT GENERATED FROM REGION 7968 DURING THE NEXT 24 HOURS. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 06/2100Z TO 07/2100Z: THE GEOMAGNETIC FIELD HAS BEEN AT QUIET LEVELS AT ALL LATITUDES FOR THE PAST 24 HOURS. YESTERDAY'S ISOLATED ACTIVE TO MINOR STORM CONDITIONS IS BELIEVED TO BE THE RESULT OF A DISAPPEARING FILAMENT EARLIER IN THE WEEK. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT 24 HOURS, WITH AND INCREASED CHANCE OF ISOLATED ACTIVE PERIODS FOR DAYS TWO AND THREE. III. EVENT PROBABILITIES 08 JUN-10 JUN CLASS M 10/10/10 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 07 JUN 073 PREDICTED 08 JUN-10 JUN 072/072/070 90 DAY MEAN 07 JUN 070 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 06 JUN 016/018 ESTIMATED AFR/AP 07 JUN 008/008 PREDICTED AFR/AP 08 JUN-10 JUN 008/008-010/008-010/010 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 08 JUN-10 JUN A. MIDDLE LATITUDES ACTIVE 15/20/20 MINOR STORM 10/10/10 MAJOR-SEVERE STORM 05/05/05 B. HIGH LATITUDES ACTIVE 15/20/20 MINOR STORM 10/15/15 MAJOR-SEVERE STORM 05/05/05