:Product: 19981005RSGA.txt :Issued: 1998 Oct 05 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 278 ISSUED AT 2200Z ON 05 OCT 1998 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 04/2100Z TO 05/2100Z: SOLAR ACTIVITY WAS VERY LOW. REGION 8350 (N19E28) PRODUCED SOME MINOR B-CLASS SUBFLARES BUT OTHERWISE SHOWED LITTLE CHANGE FROM YESTERDAY. A SMALL B-TYPE SPOT GROUP HAS RE-EMERGED IN REGION 8349 (S23W26). NEW REGION 8351 (S18W66) WAS NUMBERED TODAY. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO REMAIN VERY LOW. REGION 8350 HAS A SLIGHT CHANCE OF PRODUCING A C-CLASS FLARE. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 04/2100Z TO 05/2100Z: THE GEOMAGNETIC FIELD WAS QUIET WITH ISOLATED UNSETTLED CONDITIONS IN HIGH LATITUDES TOWARDS THE END OF THE PERIOD. ENERGETIC ELECTRON FLUXES AT GEOSYNCHRONOUS ORBIT WERE AT HIGH LEVELS ALL DAY. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET. III. EVENT PROBABILITIES 06 OCT-08 OCT CLASS M 05/05/05 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 05 OCT 117 PREDICTED 06 OCT-08 OCT 118/119/120 90 DAY MEAN 05 OCT 129 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 04 OCT 003/005 ESTIMATED AFR/AP 05 OCT 003/008 PREDICTED AFR/AP 06 OCT-08 OCT 005/008-005/008-005/008 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 06 OCT-08 OCT A. MIDDLE LATITUDES ACTIVE 10/10/10 MINOR STORM 01/01/01 MAJOR-SEVERE STORM 01/01/01 B. HIGH LATITUDES ACTIVE 10/10/10 MINOR STORM 01/01/01 MAJOR-SEVERE STORM 01/01/01