Solar activity was high. Region 1283 (N16W42) produced two major flares. The first was an X1/3b at 07/2238Z associated with weak Types II and IV radio sweeps, a 1300 sfu Tenflare, and a non-Earth-directed CME. The second was an M6/1n at 08/1546Z associated with a weak Type IV radio sweep. Region 1283 maintained a weak delta magnetic within the northern portion of its leader spots and showed trailer spot development during the period. Region 1289 (N21E51) also showed trailer spot development during the period. No new regions were numbered.

Solar activity is expected to be moderate during the period (09 - 11 September) with a chance for another X-class flare from Region 1283.

Geomagnetic field activity was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period.

Geomagnetic field activity is expected to be at quiet levels until late on day 1 (09 September). Activity is expected to increase to unsettled levels late on 09 September with a chance for active levels due to a CME arrival. A further increase to unsettled to active levels with a chance for minor storm levels is expected on day 2 (10 September) as the CME passage continues. A decrease to unsettled levels is expected on day 3 (11 September). There will be a chance for a greater than 10 MeV proton event at geosynchronous orbit on day 1.

  觀測的       08 Sep 110
  預測的   09 Sep-11 Sep  105/105/100
  90天平均值        08 Sep 099

  觀測的 Afr/Ap 07 Sep  005/006
  估算值     Afr/Ap 08 Sep  004/004
  預測的    Afr/Ap 09 Sep-11 Sep  010/012-020/022-012/015