SOLAR ACTIVITY BECAME LOW. REGION 8307 (N31E47) PRODUCED A C1/SF FLARE AT 21/1620Z. SEVERAL OTHER SMALL TO MID C-CLASS EVENTS OCCURRED BUT WERE NOT OPTICALLY CORRELATED WITH A SPECIFIC REGION. CONFLICTING DATA HAVE BEEN RECEIVED REGARDING THE GROWTH OR DECAY OF REGION 8307. TIGHT MAGNETIC GRADIENTS REMAINED IN THIS REGION BUT BY TECHNICAL DEFINITION, THE DELTA CONFIGURATION FADED. VECTOR MAGNETOGRAPH DATA ON REGION 8307 FROM 20 AUG DID NOT SHOW LARGE AREAS OF HIGH SHEAR.

SOLAR ACTIVITY SHOULD BE GENERALLY LOW TO MODERATE. REGION 8307 HAS SHOWN ITS CAPABILITY OF PRODUCING X-CLASS EVENTS AND MORE REMAIN POSSIBLE. HOWEVER, RECENT TRENDS INDICATE A LESSENING IN THE RATE OF FLARE PRODUCTION FROM THIS REGION.

THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. SOLAR WIND DATA SHOW A LOW VELOCITY FLOW IN THE EARTH'S VICINITY WITH PREDOMINANTLY NORTHWARD BZ.

THE GEOMAGNETIC FIELD SHOULD BE QUIET TO SLIGHTLY ACTIVE FOR THE NEXT THREE DAYS. AN EQUATORWARD EXTENSION OF THE NORTHERN POLAR CORONAL HOLE IS EXPECTED TO BEGIN TO DISTURB THE GEOMAGNETIC FIELD DURING THE PERIOD.

  觀測的       21 AUG 132
  預測的   22 AUG-24 AUG  135/138/139
  90天平均值        21 AUG 115

OBSERVED AFR/AP 20 AUG  014/018
ESTIMATED AFR/AP 21 AUG  005/008
PREDICTED AFR/AP 22 AUG-24 AUG  015/020-015/015-012/015