Solar activity was at moderate levels. The largest flare during the period was an M2 x-ray flare that occurred at 31/0016 UTC. The source region, based on EIT/LASCO imagery, is believed to originate from an area just behind the east limb in the proximity of newly numbered Region 9979 (S31E77). A long duration C3 x-ray flare that occurred 31/0321 UTC had an associated Type II radio sweep with an estimated shock velocity of 498 km/s. The source region for this event appears to have originated from the northwest limb, again, based on EIT/LASCO imagery. Region 9973 (S16E34) produced several minor C-class flares and retains a moderately complex beta-gamma magnetic structure to the spot group. Regions 9977 (S20W41) and 9978 (S20E62) were also numbered today.

Solar activity is expected to be at moderate levels. Region 9973 has a slight chance of producing a major flare event.

The geomagnetic field was at quiet to unsettled levels.

The geomagnetic field is expected to be at quiet to unsettled levels through the forecast period.

  Geobserveerd       31 May 182
  Voorspeld   01 Jun-03 Jun  175/170/165
  90 dagen gemiddelde        31 May 182

  Geobserveerd Afr/Ap 30 May  005/009
  Geraamd     Afr/Ap 31 May  005/006
  Voorspeld    Afr/Ap 01 Jun-03 Jun  005/008-005/008-006/008