SOLAR ACTIVITY WAS LOW. SEVERAL C-CLASS EVENTS OCCURRED TODAY, THE LARGEST OF WHICH WAS A C2/SF AT 0302Z FROM REGION 8190 (S22E36). REGION 8190 HAS SHOWN STEADY GROWTH DURING THE PAST 24 HOURS AND WAS THE SOURCE OF THE MAJORITY OF TODAY'S FLARE ACTIVITY. NEW REGION 8191 (S23E48) WAS ASSIGNED TODAY AND IS A SMALL BIPOLAR GROUP JUST EAST OF 8190. REGION 8185 (S25W51) IS STILL THE LARGEST REGION ON THE DISK BUT WAS DECLINING IN SUNSPOT AREA AND MAGNETIC FIELD INTENSITY. LASCO IMAGES BEGINNING AT 31/0626Z SHOWED A LARGE ERUPTION OF MATERIAL; THE PROJECTION WAS FROM THE SOUTHWESTERN PART OF THE DISK. THE LACK OF ANY CORRESPONDING SIGNATURES ON THE DISK SUGGEST THAT THE SOURCE WAS PROBABLY ON THE BACK SIDE OF THE SUN.

SOLAR ACTIVITY IS EXPECTED TO BE LOW. THERE CONTINUES TO BE A SLIGHT CHANCE FOR ISOLATED M-CLASS EVENTS. REGION 8190 IS EXPECTED TO BE THE MOST ACTIVE REGION OVER THE NEXT THREE DAYS.

THE GEOMAGNETIC FIELD WAS MOSTLY QUIET TO UNSETTLED. MINOR INTENSITY SUBSTORMS WERE RECORDED AT HIGH LATITUDE BETWEEN FROM 0300-0900Z, LEADING TO UNSETTLED LEVELS AT MID-LATITUDE STATIONS AND ACTIVE LEVELS FOR THE PLANETARY INDICES. THE FIELD WAS QUIET AT ALL LATITUDES FOR THE REMAINDER OF THE PERIOD. THE GREATER THAN 2 MEV ELECTRON FLUXES ATTAINED HIGH LEVELS.

THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED TO ACTIVE, WITH A CHANCE FOR SOME MINOR STORM LEVEL CONDITIONS, OVER THE NEXT 24-48 HOURS. ENHANCED ACTIVITY IS POSSIBLE BECAUSE OF A TRANSIENT ASSOCIATED WITH THE FILAMENT ERUPTION ON 30 MARCH. CONDITIONS ARE EXPECTED TO RETURN TO UNSETTLED TO QUIET LEVELS BY THE THIRD DAY.

  觀測的       31 MAR 108
  預測的   01 APR-03 APR  110/110/105
  90天平均值        31 MAR 099

OBSERVED AFR/AP 30 MAR  006/010
ESTIMATED AFR/AP 31 MAR  012/012
PREDICTED AFR/AP 01 APR-03 APR  020/015-012/020-007/015