Solar activity was high. Two major flares were observed during the past 24 hours. The first was a long-duration M8 that peaked at 0922Z, originating from Region 9393 behind the west limb. This flare was associated with a CME which gives every indication of moving in a westward direction, perpendicular to the Earth-Sun line. The second was an M5/2n at 1725Z from Region 9415 (S21E47). This event had an extended maximum and a slow decay profile. An associated CME was just entering the C2 field of view at forecast issue time and did not appear to have any earthward component. Region 9415 appears to have formed a delta configuration in the leader portion of the group. Region 9417 (S08E27) grew rapidly during the last 24 hours and produced an M1/Sn flare at 0834Z. Today's 10.7 cm background flux of 210 SFU had to be estimated due to greatly enhanced radio noise levels occurring with today's long-duration flare activity.

Solar activity is expected to be mostly moderate during the next three days. There is a fair chance, however, for additional major flares from Region 9415.

The geomagnetic field was predominantly quiet to active during the past 24 hours. The first nine hours of the period were quiet, but activity increased to mostly active from 0600-2100Z. There was a minor storm period at high latitudes from 0900-1200Z. The greater than 10 MeV proton event continues in progress with a continued slow decline in flux levels. The flux at 05/2100Z was 25 pfu.

The geomagnetic field is expected to be mostly unsettled tomorrow, with a chance for some isolated active periods. Predominantly unsettled levels should prevail for the second and third days.

  Pozorováno       05 Apr 210
  Předpovězeno   06 Apr-08 Apr  210/210/205
  90 denní průměr        05 Apr 167

  Pozorováno Afr/Ap 04 Apr  012/015
  Odhadovaný     Afr/Ap 05 Apr  015/015
  Předpovězeno    Afr/Ap 06 Apr-08 Apr  015/015-012/008-012/008