Solar activity reached high levels. Following yesterday's M3/2B flare from Region 9698 (S24W82), a major flare event occurred in Region 9704 (S17W51). This M9/2n long duration event peaked at 22/2330 UTC, and was associated with a 9700 sfu tenflare, type-II and type-IV radio sweeps, and several erupting filaments in the vicinity of the flare site. A subsequent full halo CME was observed in SOHO/LASCO imagery, and energetic proton flux levels were also significantly enhanced by this event, adding to the above-threshold fluxes already caused by the prior flare. Most other activity for the remainder of the period was limited to weak C-class flares. New Region 9715 (N07E80) was numbered as it rotated into view on the east limb.

Solar activity is expected to be predominantly low to moderate for the next three days. Region 9704 remains a potential source for an isolated major flare.

The geomagnetic field was predominantly quiet to unsettled. A single active period was observed at Boulder during 23/1200-1500 UTC. Energetic proton flux at geosynchronous orbit was on the rise at the beginning of the period, and achieved event thresholds for 100 MeV integral flux above 1 pfu at 22/2250 UTC, and 10 MeV integral flux above 10 pfu at 22/2320 UTC. Both events remain in progress, with maximum 100 MeV integral flux of 4 pfu observed at 23/0850 UTC, and maximum 10 MeV integral flux of 4800 pfu at 23/1400 UTC.

Geomagnetic field activity is expected to increase to active levels within 24 hours, and remain at predominantly active levels for the next three days. Isolated minor and major storm periods are possible. These increases are expected in response to the various CME episodes of the last three days. The energetic proton events are expected to persist. The 100 MeV integral flux levels are expected to drop below threshold within 24 hours, while the 10 MeV integral flux levels are expected to remain above threshold for at least 48 hours.

  觀測的       23 Nov 177
  預測的   24 Nov-26 Nov  175/170/170
  90天平均值        23 Nov 218

  觀測的 Afr/Ap 22 Nov  008/008
  估算值     Afr/Ap 23 Nov  012/010
  預測的    Afr/Ap 24 Nov-26 Nov  020/020-040/050-030/030