SOLAR ACTIVITY REMAINED MODERATE. REGION 8910 (N13W35) PRODUCED AN M2/2B FLARE AT 1644Z. THE REGION HAD NUMEROUS SMALLER EVENTS AS IT REMAINED LARGE (680 MILLIONTHS IN WHITE LIGHT) AND COMPLEX (BETA-GAMMA DELTA). EARLIER IN THE DAY, AN M2/LIMB FLARE WITH TYPES II AND IV SWEEP OCCURRED AT 0834Z, FROM AN AREA NEAR S18E90. NEWLY ASSIGNED REGION 8921 (S15E71) IS NEARBY, BUT LIMB PROXIMITY PROHIBITS AN UNAMBIGUOUS DETERMINATION OF THE SOURCE OF THAT ACTIVITY. SOHO DATA SUGGEST THERE MAY BE MULTIPLE ACTIVE REGIONS COMING INTO VIEW THERE. ELSEWHERE, A SECOND NEW REGION, 8920 (N24E55), WAS NUMBERED.

SOLAR ACTIVITY SHOULD REMAIN MODERATE. REGION 8910 IS LIKELY TO PRODUCE M-CLASS EVENTS, WITH A CHANCE OF AN ISOLATED X-CLASS FLARE.

THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.

THE GEOMAGNETIC FIELD IS EXPECTED TO PERSIST AT QUIET TO UNSETTLED CONDITIONS.

  觀測的       20 MAR 210
  預測的   21 MAR-23 MAR  215/220/225
  90天平均值        20 MAR 174

OBSERVED AFR/AP 19 MAR  006/008
ESTIMATED AFR/AP 20 MAR  005/008
PREDICTED AFR/AP 21 MAR-23 MAR  010/008-010/015-010/010