Solar activity was low. Low-level C-class activity continued. The largest flare was a C4/Sn at 27/2352 UTC in Region 9242 (N19E11). This is still a small sunspot group but is developing and has produced a number of subflares. Region 9236 (N19W64) remains the largest sunspot group on the visible disk but since yesterday has only produced minor flares without significant X-ray output. This active region is slowly decaying in all parameters. New Regions 9245 (N04E65) and 9246 (S12E47) were numbered.

Solar activity is expected to be low to moderate. C-class activity is possible in Regions 9236, 9242, 9244, and 9246. Region 9236 may produce another major flare before it completely decays or departs the visible disk.

The geomagnetic field ranged from quiet to major storm levels. A shock, presumably from CME's occurring on November 25 or 26, was observed at the NASA ACE spacecraft at 28/0459 UTC. The greater than 10 MeV proton event continues in progress. The present particle flux is about 20 pfu and is slowly declining.

The geomagnetic field is expected to be at active to storm levels becoming quiet to unsettled as the present disturbance subsides. The most recent CME (see Part IIA) is the last one expected from the flare/CME activity of the last several days. The greater that 10 MeV proton event is expected to end within the next 24 hours.

  觀測的       28 Nov 196
  預測的   29 Nov-01 Dec  195/190/180
  90天平均值        28 Nov 176

  觀測的 Afr/Ap 27 Nov  027/038
  估算值     Afr/Ap 28 Nov  030/035
  預測的    Afr/Ap 29 Nov-01 Dec  015/025-010/020-010/015