Solar activity increased to moderate levels. Region 9488 (S18E48) produced an M2/2b flare with associated tenflare of 210 sfu at 04/0812 UTC. This region also produced several lesser flares during the period, and now exhibits increased magnetic complexity, currently in a Cko/beta-gamma configuration. Another event of note occurred in spotless Region 9474 (N22W64) at 04/1633 UTC, when a C3/Sf flare and associated Type-II radio sweep was observed, along with a small, nearby filament disappearance. Some enhancement in 10MeV proton flux was observed following this event, indicating a well-connected location for this activity, though not expected to result in a proton event. CME activity was observed in association with today's events, but not appearing earth-directed.

Solar activity is expected to be low to moderate for the next three days. Region 9488 is a likely source of more M-class activity as it continues to develop, along with Region 9484 (S06W06), which remains magnetically complex and capable of producing moderate flares.

The geomagnetic field was mainly quiet to unsettled, with an isolated active period at higher latitudes during 04/0000-0300 UTC. Coronal hole high speed stream effects appeared to end at about 0700 UTC.

The geomagnetic field is expected to be at quiet to unsettled levels for the first two days of the period. There is a chance for development of coronal hole effects with isolated active periods possible beginning on day three.

  Observé       04 Jun 154
  Prévisionnel   05 Jun-07 Jun  160/160/165
  Moyenne des 90 derniers jours        04 Jun 169

  Observé Afr/Ap 03 Jun  007/011
  Estimé     Afr/Ap 04 Jun  006/012
  Prévisionnel    Afr/Ap 05 Jun-07 Jun  005/008-005/008-008/012