:Product: 19970812RSGA.txt :Issued: 1997 Aug 12 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 224 ISSUED AT 2200Z ON 12 AUG 1997 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 11/2100Z TO 12/2100Z: SOLAR ACTIVITY WAS VERY LOW. X-RAY BURSTS HAVE BEEN SMALLER AND LESS FREQUENT, WITH THE LARGEST EVENT OF THE PERIOD JUST A B3. THE FOUR SPOTTED REGIONS HAVE ALL BEEN QUIET AND STABLE. A FIFTH AS YET UNNUMBERED REGION MAY BE APPEARING NEAR N27W54. UNLIKE THE LAST FEW DAYS, THE LIMBS WERE QUIET. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 11/2100Z TO 12/2100Z: THE GEOMAGNETIC FIELD WAS QUIET. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED. III. EVENT PROBABILITIES 13 AUG-15 AUG CLASS M 01/01/01 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 12 AUG 081 PREDICTED 13 AUG-15 AUG 082/082/084 90 DAY MEAN 12 AUG 073 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 11 AUG 010/009 ESTIMATED AFR/AP 12 AUG 005/012 PREDICTED AFR/AP 13 AUG-15 AUG 005/010-005/010-005/010 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 13 AUG-15 AUG A. MIDDLE LATITUDES ACTIVE 10/10/10 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