Solar activity was low. Regions 9636 (N13W70) and 9645 (S17W41) produced C2/Sf events early in the period. Several Type III radio sweeps and discrete frequency radio bursts made up the rest of today's activity. The partial halo CME seen on EIT imagery yesterday appears to have been caused by a back-side source. Region 9636 and Region 9641 (S13W19) both showed an increase area coverage of their respective spot coverage today. Three new groups were numbered today, Region 9651 (S22W12), Region 9652 (N22E14), and Region 9653 (S23E76). Region 9653 has a penumbral spot that can be seen rotating onto the east limb and has a latitude of that in which old Region 9608 had as it departed the west limb.

Solar activity is expected to be moderate. Region 9636 and Region 9645 remain capable of producing M-class flares.

The geomagnetic field was at quiet to minor storm levels. The greater than 10 MeV proton flux peaked at 02/0810 UTC, 2360 pfu. Flux levels remain above event level at time of bulletin issue.

Geomagnetic activity is expected to be at quiet to unsettled levels with isolated active periods possible early on the first day of forecast period due to CME passage.

  觀測的       04 Oct 187
  預測的   05 Oct-07 Oct  185/190/195
  90天平均值        04 Oct 180

  觀測的 Afr/Ap 03 Oct  026/053
  估算值     Afr/Ap 04 Oct  015/020
  預測的    Afr/Ap 05 Oct-07 Oct  010/010-008/010-008/010