SOLAR ACTIVITY WAS MODERATE. REGION 9166 (S12W70) PRODUCED AN M3/1N FLARE AT 25/0053Z AND SEVERAL MINOR C-CLASS FLARES THROUGHOUT THE PERIOD. THIS REGION HAS UNDERWENT SLOW DECAY OVER THE PAST FEW DAYS, BUT MAINTAINS MODERATE COMPLEXITY. REGION 9169 (N11W22) PRODUCED AN M1 FLARE AT 25/0215Z WITH MODERATE CENTIMETRIC BURSTS INCLUDING A 450SFU TENFLARE. A CME WAS ALSO OBSERVED. SOME DECAY WAS NOTED IN THIS LARGE AND MODERATELY COMPLEX REGION WHICH NOW MEASURES 1400 MILLIONTHS OF WHITE LIGHT AREA.

SOLAR ACTIVITY IS EXPECTED TO CONTINUE AT LOW TO MODERATE LEVELS. REGIONS 9166 AND 9169 WILL CONTINUE TO PRODUCE C-CLASS FLARES WITH AN ISOLATED M-CLASS FLARE LIKELY. IIA. GEOPHYSICAL ACTIVITY SUMMARY 24/2100Z TO 25/2100Z: THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. PROLONGED PERIODS OF SOUTHWARD BZ AND ENHANCED SOLAR WIND SPEED PRODUCED OCCASIONAL ACTIVE PERIODS. THE GREATER THAN 2 MEV ELECTRONS AT GEOSYNCHRONOUS ORBIT WERE AT MOSTLY MODERATE TO HIGH LEVELS.

THE GEOMAGNETIC FIELD IS EXPECTED TO BE PREDOMINANTLY QUIET TO UNSETTLED WITH OCCASIONAL ACTIVE PERIODS ON DAY ONE. ACTIVE TO MINOR STORM CONDITIONS ARE POSSIBLE ON DAY TWO FROM AN EXPECTED CME PASSAGE FROM TODAY'S M1 FLARE IN REGION 9169 AT 02/0215Z. A RETURN TO QUIET TO UNSETTLED CONDITIONS IS EXPECTED BY DAY THREE.

  觀測的       25 SEP 226
  預測的   26 SEP-28 SEP  220/210/200
  90天平均值        25 SEP 180

OBSERVED AFR/AP 24 SEP  009/010
ESTIMATED AFR/AP 25 SEP  017/018
PREDICTED AFR/AP 26 SEP-28 SEP  015/015-020/020-012/010