SOLAR ACTIVITY WAS MODERATE. AN M2/1B ACCOMPANIED BY A TYPE II RADIO SWEEP OCCURRED AT 17/1852UT FROM REGION 8869 (S22W21). AN M1 EVENT OCCURRED AT 17/2035UT ACCOMPANIED BY A 200 SFU TENFLARE. THIS EVENT WAS REPORTED TO OCCUR IN REGION 8872 (S29E02). THE OPTICAL OBSERVATORY WAS UNABLE OF DETERMINE THE SIZE AND INTENSITY OF THE FLARE DUE TO POOR SEEING CONDITIONS. BOTH EVENTS PRODUCED DISAPPEARING SOLAR FILAMENTS AS WELL. THESE EVENTS WERE SOMEWHAT UNEXPECTED AS THE REGIONS SHOWED VERY LITTLE ACTIVITY PRIOR TO FLARING. THE REST OF THE DISK AND LIMBS WERE MOSTLY QUIET AND STABLE.

SOLAR ACTIVITY IS EXPECTED TO BE LOW WITH AN ISOLATED CHANCE OF M-CLASS EVENTS.

THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.

THE GEOMAGNETIC FIELD IS EXPECTED TO CONTINUE TO BE QUIET TO UNSETTLED FOR THE FIRST PART OF THE PERIOD. ACTIVITY COULD INCREASE ON THE THIRD DAY DUE TO THE M2 AND M1 EVENTS THAT OCCURRED DURING THIS PERIOD.

  觀測的       17 FEB 168
  預測的   18 FEB-20 FEB  155/150/150
  90天平均值        17 FEB 167

OBSERVED AFR/AP 16 FEB  006/005
ESTIMATED AFR/AP 17 FEB  008/006
PREDICTED AFR/AP 18 FEB-20 FEB  008/008-008/008-042/012