:Product: 19980623RSGA.txt :Issued: 1998 Jun 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 174 ISSUED AT 2200Z ON 23 JUN 1998 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 22/2100Z TO 23/2100Z: SOLAR ACTIVITY WAS LOW, BASED ON TWO C1/SF EVENTS FROM REGION 8253 (N18E66). THE REST OF THE VISIBLE DISK HAS BEEN STABLE AND UNREMARKABLE. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO REMAIN VERY LOW TO LOW, WITH CONTINUED ISOLATED C-CLASS EVENTS LIKELY FROM REGION 8253. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 22/2100Z TO 23/2100Z: THE GEOMAGNETIC FIELD HAS BEEN QUIET TO UNSETTLED AT ALL LATITUDES FOR THE PAST 24 HOURS. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE MOSTLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. III. EVENT PROBABILITIES 24 JUN-26 JUN CLASS M 01/01/01 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 23 JUN 096 PREDICTED 24 JUN-26 JUN 098/099/100 90 DAY MEAN 23 JUN 107 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 22 JUN 008/010 ESTIMATED AFR/AP 23 JUN 008/008 PREDICTED AFR/AP 24 JUN-26 JUN 005/008-010/010-010/008 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 24 JUN-26 JUN A. MIDDLE LATITUDES ACTIVE 15/15/15 MINOR STORM 05/05/05 MAJOR-SEVERE STORM 01/01/01 B. HIGH LATITUDES ACTIVE 15/15/15 MINOR STORM 05/05/05 MAJOR-SEVERE STORM 01/01/01