Solar activity was low. The most impressive event of the period was a long duration C8/1f flare and associated CME at 17/0820Z from Region 114 (S11W43). This region has been in gradual decline, but still maintains moderate complexity. Region 110 (N17W75) was the likely source of the C5 flare at 17/0205Z. A CME with Type II radio sweep (1000km/s) accompanied this flare. Region 119 (S14E17) continues to develop and produced several minor flares in the past 24 hours, the largest being a C8/Sn at 17/0921Z. The largest region on the visible disk is Region 105 (S08W56) at 560 millionths of white light area. This moderately complex region was relatively quiet, producing occasional subflares. New Region 123 (S16E30) was numbered today.

Solar activity is expected to be low to moderate. Several regions on the disk have the potential for an isolated low M-class flare.

The geomagnetic field was quiet to unsettled with one active period between 17/12-15Z. The greater than 2 MeV electron flux was at moderate to high levels.

The geomagnetic field is expected to be mostly unsettled. Active periods are likely on day three in response to today's long duration C8 flare and CME from Region 114.

  Observerad       17 Sep 194
  Prognoserat   18 Sep-20 Sep  195/190/190
  90 Day Mean        17 Sep 177

  Observerad Afr/Ap 16 Sep  005/008
  Förväntat     Afr/Ap 17 Sep  015/014
  Prognoserat    Afr/Ap 18 Sep-20 Sep  010/012-010/015-015/015