:Product: 19990322RSGA.txt :Issued: 1999 Mar 22 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 081 ISSUED AT 2200Z ON 22 MAR 1999 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 21/2100Z TO 22/2100Z: SOLAR ACTIVITY WAS LOW DUE TO AN OPTICALLY UNCORRELATED C1 X-RAY FLARE AT 22/0152UT. NO OPTICAL FLARES WERE REPORTED. ALL DISK REGIONS ARE SMALL AND SIMPLE. NEW REGION 8497 (N30E60) ROTATED AROUND THE EAST LIMB. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 21/2100Z TO 22/2100Z: THE GEOMAGNETIC FIELD WAS QUIET. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED. III. EVENT PROBABILITIES 23 MAR-25 MAR CLASS M 01/01/01 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 22 MAR 116 PREDICTED 23 MAR-25 MAR 110/110/110 90 DAY MEAN 22 MAR 142 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 21 MAR 006/006 ESTIMATED AFR/AP 22 MAR 004/005 PREDICTED AFR/AP 23 MAR-25 MAR 005/008-005/012-010/010 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 23 MAR-25 MAR A. MIDDLE LATITUDES ACTIVE 15/15/20 MINOR STORM 01/01/10 MAJOR-SEVERE STORM 01/01/05 B. HIGH LATITUDES ACTIVE 15/15/20 MINOR STORM 01/01/10 MAJOR-SEVERE STORM 01/01/05