:Product: 19960513RSGA.txt :Issued: 1996 May 13 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 134 ISSUED AT 2200Z ON 13 MAY 1996 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 12/2100Z TO 13/2100Z: SOLAR ACTIVITY WAS VERY LOW. ONLY TWO B-CLASS FLARES WERE OBSERVED DURING THE PERIOD. REGION 7962 (S06W15) IS THE ONLY SPOTTED REGION ON THE DISK AND IS GENERALLY DECLINING IN SIZE AND ACTIVITY PRODUCTION. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 12/2100Z TO 13/2100Z: THE GEOMAGNETIC FIELD HAS BEEN AT QUIET TO ACTIVE LEVELS FOR THE PAST 24 HOURS. CONDITIONS WERE QUIET EARLY IN THE PERIOD BUT AN INCREASE TO MOSTLY UNSETTLED CONDITIONS WITH OCCASIONAL ACTIVE PERIODS BEGAN AT 13/0000Z AND CONTINUED THROUGH THE END OF THE DAY. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE MOSTLY UNSETTLED WITH OCCASIONAL ACTIVE PERIODS OVER THE NEXT THREE DAYS DUE TO THE EFFECTS FROM RECURRENCE. III. EVENT PROBABILITIES 14 MAY-16 MAY CLASS M 01/01/01 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 13 MAY 072 PREDICTED 14 MAY-16 MAY 072/072/072 90 DAY MEAN 13 MAY 071 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 12 MAY 005/006 ESTIMATED AFR/AP 13 MAY 012/012 PREDICTED AFR/AP 14 MAY-16 MAY 015/012-015/015-010/015 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 14 MAY-16 MAY A. MIDDLE LATITUDES ACTIVE 45/40/40 MINOR STORM 05/10/10 MAJOR-SEVERE STORM 01/05/05 B. HIGH LATITUDES ACTIVE 35/35/35 MINOR STORM 15/15/15 MAJOR-SEVERE STORM 05/05/05