SOLAR ACTIVITY WAS LOW. REGION 9143 (S18W20) PRODUCED TODAY'S LARGEST EVENT, A C1/SF AT 0656Z. THIS GROUP HAS SHOWN SLIGHT DECAY DURING THE PAST 24 HOURS. REGION 9149 (N12E32) CONTINUES TO BE THE LARGEST GROUP ON THE DISK BUT WAS STABLE AND QUIET. NEW REGIONS 9150 (N11E51), 9151 (N05E42), AND 9152 (N17E75) ARE SMALL, STABLE GROUPS THAT WERE ASSIGNED DURING THE PAST 24 HOURS.

SOLAR ACTIVITY IS EXPECTED TO BE PREDOMINANTLY LOW. THERE IS A SLIGHT-TO-FAIR CHANCE FOR AN ISOLATED M-CLASS EVENT DURING THE NEXT THREE DAYS. IIA. GEOPHYSICAL ACTIVITY SUMMARY 30/2100Z TO 31/2100Z: THE GEOMAGNETIC FIELD WAS UNSETTLED TO ACTIVE. SOLAR WIND OBSERVATIONS INDICATE THE CONTINUED INFLUENCE OF A HIGH-SPEED CORONAL HOLE STREAM. THE GREATER THAN 2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT EXCEEDED HIGH LEVELS DURING THE PAST 24 HOURS.

THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED WITH A CHANCE FOR ISOLATED ACTIVE PERIODS DURING THE NEXT 24 HOURS AS EFFECTS FROM THE CORONAL HOLE STREAM ARE EXPECTED TO CONTINUE. PREDOMINANTLY UNSETTLED LEVELS ARE EXPECTED FOR THE SECOND AND THIRD DAYS.

  觀測的       31 AUG 163
  預測的   01 SEP-03 SEP  165/163/161
  90天平均值        31 AUG 181

OBSERVED AFR/AP 30 AUG  012/013
ESTIMATED AFR/AP 31 AUG  015/016
PREDICTED AFR/AP 01 SEP-03 SEP  015/015-012/012-010/010