Solar activity was moderate. Region 1496 (N16E33) produced an impulsive M3 flare at 03/1755Z. The flare was accompanied by a Tenflare (320 sfu) at 03/1753Z. A Type II emission (est 1077 km/s) was also reported at 03/1759Z. A CME was later observed in LASCO C3 imagery departing the northeast limb at 03/1854Z. Earlier in the day, C3 imagery showed a CME departing the southeast limb at 03/1342Z associated with a filament eruption. Analysis is underway to determine the potential geoeffectiveness of the CMEs. New Region 1499 (N16E50) was numbered today as a small Dso type group with beta magnetic characteristics. All regions on the disk were classified as simple alpha or beta magnetic characteristics.

Solar activity is expected to remain low with a chance for an M-class flare for the next three days (04-06 June).

The geomagnetic field ranged from quiet to minor storm levels. Although the solar wind speed measured at the ACE spacecraft remained below 400 km/s for most of the period, the Bz component of the interplanetary magnetic field remaind southward from approximately 03/0400Z until about 02/1730Z, ranging from -5 nT to as low as -15 nT. The geomagnetic field responded with an active period from 03/12-15Z and a minor storm period from 03/15-18Z. Conditions returned to active levels for the last period.

The geomagnetic field is expected to be at active levels for days one and two (4-5 June) with a chance for isolated minor storm periods. Day three (6 June) is expected to be at unsettled to active levels. A recurrent coronal hole high speed stream is expected to be in a geoeffective position throughout the forecast period.

  Observed       03 Jun 129
  Predicted   04 Jun-06 Jun  130/130/130
  90 Day Mean        03 Jun 117

  Observed Afr/Ap 02 Jun  008/008
  Estimated     Afr/Ap 03 Jun  014/021
  Predicted    Afr/Ap 04 Jun-06 Jun  014/020-014/027-014/018