SOLAR ACTIVITY BECAME MODERATE. REGION 9143 (S19E59) PRODUCED AN M1/1N AT 25/1435Z. THIS EVENT WAS ACCOMPANIED BY A TYPE II/IV AND A 130 SFU BURST AT 2695 MHZ. A LARGE DENSE MASS EJECTION FOLLOWED THE EVENT AND WAS SEEN TO PROPAGATE PRIMARILY OFF THE EAST LIMB NEAR THE EQUATOR. PRIOR TO THIS EVENT, REGION 9143 WAS PREDOMINANTLY STABLE. A LARGE FILAMENT NEAR N37W21 ERUPTED BETWEEN 25/0955-1123Z. THIS FILAMENT ELEVATED AND BECAME MORE DENSE FOR AT LEAST A DAY BEFORE THE ERUPTION. A SMALL REGION BEGAN TO EMERGE RAPIDLY NEAR N25E14 AND WAS NUMBERED AS NEW REGION 9144.

SOLAR ACTIVITY SHOULD BE PREDOMINANTLY LOW. OBVIOUSLY, REGION 9143 IS CAPABLE OF GENERATING M-CLASS EVENTS. HOWEVER, THE LACK OF OBVIOUS GROWTH AND MAGNETIC SIMPLICITY ARGUE FOR ONLY ISOLATED M-CLASS EVENTS FROM THIS REGION. IIA. GEOPHYSICAL ACTIVITY SUMMARY 24/2100Z TO 25/2100Z: THE GEOMAGNETIC FIELD WAS QUIET. SOLAR WIND VELOCITY WAS STEADY NEAR 400 KM/S.

THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. AT THIS TIME, THE MASS EJECTION OBSERVED TODAY IS NOT PROJECTED TO IMPACT THE EARTH.

  觀測的       25 AUG 133
  預測的   26 AUG-28 AUG  135/137/140
  90天平均值        25 AUG 181

OBSERVED AFR/AP 24 AUG  007/010
ESTIMATED AFR/AP 25 AUG  003/008
PREDICTED AFR/AP 26 AUG-28 AUG  005/008-005/008-008/010