SOLAR ACTIVITY DECREASED TO LOW LEVELS. OCCASIONAL, MOSTLY LOW-LEVEL C-CLASS SUBFLARES OCCURRED, MOST OF WHICH WERE PRODUCED BY REGION 9054 (N12W18). THIS REGION IS A MEDIUM-SIZED, MIXED-POLARITY (BETA-GAMMA) GROUP THAT HAS GRADUALLY DEVELOPED DURING THE LAST FEW DAYS. IT WAS THE LIKELY SOURCE (BASED ON SOHO/EIT IMAGES) FOR A C4 X-RAY FLARE AT 26/0157Z ASSOCIATED WITH A WEAK TYPE II RADIO SWEEP (EST. SHOCK VELOCITY 800 KM/SEC) AND A POSSIBLE PARTIAL-HALO CME. REGIONS 9046 (N20W75) AND 9049 (N16W09) DECAYED SLIGHTLY, WHILE THE REMAINING REGIONS WERE STABLE. NEW REGION 9063 (N24E41) WAS NUMBERED.

SOLAR ACTIVITY IS EXPECTED TO BE AT LOW TO MODERATE LEVELS. OCCASIONAL C-CLASS SUBFLARES ARE EXPECTED. REGION 9054 APPEARS CAPABLE OF PRODUCING AN ISOLATED M-CLASS FLARE.

GEOMAGNETIC FIELD ACTIVITY INCREASED TO UNSETTLED TO ACTIVE LEVELS WITH BRIEF MINOR TO MAJOR STORM PERIODS AT HIGH LATITUDES.

GEOMAGNETIC FIELD ACTIVITY IS EXPECTED TO REMAIN AT UNSETTLED TO ACTIVE LEVELS DURING 27 - 28 JUNE WITH BRIEF STORM LEVELS POSSIBLE AT HIGH LATITUDES. FIELD ACTIVITY IS EXPECTED TO DECLINE TO QUIET TO UNSETTLED LEVELS DURING THE LAST DAY OF THE PERIOD. THE GREATER THAN 2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT IS EXPECTED TO INCREASE TO MODERATE TO HIGH LEVELS DURING THE PERIOD.

  觀測的       26 JUN 177
  預測的   27 JUN-29 JUN  170/165/165
  90天平均值        26 JUN 185

OBSERVED AFR/AP 25 JUN  011/008
ESTIMATED AFR/AP 26 JUN  020/030
PREDICTED AFR/AP 27 JUN-29 JUN  015/020-015/017-012/012