:Product: 19960311RSGA.txt :Issued: 1996 Mar 11 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 071 ISSUED AT 2200Z ON 11 MAR 1996 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 10/2100Z TO 11/2100Z: SOLAR ACTIVITY WAS VERY LOW. NEWLY ASSIGNED REGION NUMBER 7952 (S03E37) SHOWED STEADY GROWTH AND PRODUCED FREQUENT B-CLASS SUBFLARES DURING THE LAST 24 HOURS. THE LARGEST OF THESE WAS A B9/SF AT 1620Z. THE GROUP IS CURRENTLY A SMALL BXO TYPE GROUP WITH A NORTHWEST TO SOUTHEAST MAGNETIC INVER- SION LINE. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW. THERE IS A FAIR CHANCE FOR AN ISOLATED C-CLASS FLARE. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 10/2100Z TO 11/2100Z: THE GEOMAGNETIC FIELD HAS BEEN AT QUIET TO MAJOR STORM LEVELS. ACTIVE TO MINOR STORM LEVELS PREDOMINATED FROM 10/2100Z THROUGH 11/1500Z WITH A PERIOD OF MAJOR STORM LEVELS FROM 0300-0600Z. CONDITIONS WERE QUIET TO UNSETTLED FROM 11/1500Z TO THE END OF THE PERIOD. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED WITH SOME ISOLATED ACTIVE PERIODS OVER THE NEXT 12-24 HOURS DUE TO PERSISTENCE. CONDITIONS SHOULD BE MOSTLY UNSETTLED THEREAFTER. III. EVENT PROBABILITIES 12 MAR-14 MAR CLASS M 05/05/05 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 11 MAR 072 PREDICTED 12 MAR-14 MAR 072/072/073 90 DAY MEAN 11 MAR 072 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 10 MAR 008/009 ESTIMATED AFR/AP 11 MAR 024/020 PREDICTED AFR/AP 12 MAR-14 MAR 015/010-010/010-010/010 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 12 MAR-14 MAR A. MIDDLE LATITUDES ACTIVE 25/15/25 MINOR STORM 15/10/20 MAJOR-SEVERE STORM 05/05/10 B. HIGH LATITUDES ACTIVE 25/15/25 MINOR STORM 15/10/20 MAJOR-SEVERE STORM 05/05/10