:Product: 19981024RSGA.txt :Issued: 1998 Oct 24 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 297 ISSUED AT 2200Z ON 24 OCT 1998 IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 23/2100Z TO 24/2100Z: SOLAR ACTIVITY WAS LOW. REGION 8365 (S26W72) GENERATED A SINGLE C1/SF X-RAY EVENT AT 24/0454Z. THE TWO OTHER ACTIVE REGIONS ON THE VISIBLE DISK, 8366 (S11W43) AND 8367 (N17W42), WERE QUIET AND UNREMARKABLE. IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE LOW, WITH CONTINUED C-CLASS ACTIVITY FROM REGION 8365 LIKELY AS IT APPROACHES THE WEST LIMB. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 23/2100Z TO 24/2100Z: THE GEOMAGNETIC FIELD HAS BEEN QUIET TO UNSETTLED FOR THE PAST 24 HOURS, WITH ISOLATED PERIODS OF ACTIVE CONDITIONS RECORDED DURING THE INTERVAL 24/0300-0900Z. THE GREATER THAN 2 MEV ELECTRON FLUX REMAINED HIGH. IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. III. EVENT PROBABILITIES 25 OCT-27 OCT CLASS M 10/10/05 CLASS X 01/01/01 PROTON 01/01/01 PCAF GREEN IV. PENTICTON 10.7 CM FLUX OBSERVED 24 OCT 111 PREDICTED 25 OCT-27 OCT 110/110/112 90 DAY MEAN 24 OCT 131 V. GEOMAGNETIC A INDICES OBSERVED AFR/AP 23 OCT 008/013 ESTIMATED AFR/AP 24 OCT 010/012 PREDICTED AFR/AP 25 OCT-27 OCT 010/010-010/010-010/008 VI. GEOMAGNETIC ACTIVITY PROBABILITIES 25 OCT-27 OCT A. MIDDLE LATITUDES ACTIVE 15/15/15 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