SOLAR ACTIVITY WAS LOW. REGION 8963 (N16E09) RAPIDLY EMERGED AS THE PRIMARY FLARE PRODUCING REGION ON THE VISIBLE DISK AND WAS RESPONSIBLE FOR THE THREE LARGEST EVENTS OF THE PERIOD. THE FIRST AND LARGEST EVENT WAS A C7/SF AT 18/0805UT, FOLLOWED BY A C4 FLARE WITH A TYPE II SWEEP AT 18/1153UT, AND FINALLY A C4/SF AT 18/1415UT. ALL EVENTS WERE ACCOMPANIED BY MINOR CENTIMETRIC BURSTS. THIS REGION, THOUGH QUITE ACTIVE, IS A RELATIVELY SMALL DAO GROUP WITH 80 MILLIONTHS OF WHITE LIGHT AREA. REGION 8955 (S22W19) HAS STABILIZED, PRODUCING ONLY OCCASIONAL MINOR C-CLASS FLARES. NEW REGION 8966 (S13E65) WAS NUMBERED TODAY. REMAINING REGIONS WERE QUIET.

SOLAR ACTIVITY IS EXPECTED TO BE LOW. REGIONS 8955 AND 8963 WILL LIKELY CONTINUE TO PRODUCE C-CLASS ACTIVITY.

THE GEOMAGNETIC FIELD WAS MOSTLY QUIET WITH OCCASIONAL UNSETTLED PERIODS.

THE GEOMAGNETIC FIELD IS EXPECTED TO REMAIN AT QUIET TO UNSETTLED LEVELS.

  觀測的       18 APR 160
  預測的   19 APR-21 APR  160/165/170
  90天平均值        18 APR 183

OBSERVED AFR/AP 17 APR  011/014
ESTIMATED AFR/AP 18 APR  006/010
PREDICTED AFR/AP 19 APR-21 APR  008/012-010/015-005/008