:Product: 19990326RSGA.txt :Issued: 1999 Mar 26 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 085 ISSUED AT 2200Z ON 26 MAR 1999 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 25/2100Z TO 26/2100Z: SOLAR ACTIVITY REMAINED VERY LOW. THE THREE SPOTTED REGIONS WERE QUIET AND STABLE. NEW SPOTS MAY BE EMERGING JUST WEST OF REGION 8498 (N18E29). THE LIMBS WERE QUIET. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY SHOULD CONTINUE VERY LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 25/2100Z TO 26/2100Z: THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO PERSIST AT QUIET TO UNSETTLED CONDITIONS FOR THE NEXT THREE DAYS. III. EVENT PROBABILITIES 27 MAR-29 MAR CLASS M 01/01/01 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 26 MAR 104 PREDICTED 27 MAR-29 MAR 105/105/110 90 DAY MEAN 26 MAR 140 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 25 MAR 005/008 ESTIMATED AFR/AP 26 MAR 008/008 PREDICTED AFR/AP 27 MAR-29 MAR 010/012-010/012-010/015 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 27 MAR-29 MAR A. MIDDLE LATITUDES ACTIVE 20/20/20 MINOR STORM 05/05/05 MAJOR-SEVERE STORM 01/01/01 B. HIGH LATITUDES ACTIVE 25/25/25 MINOR STORM 05/05/05 MAJOR-SEVERE STORM 01/01/01