Solar activity was low. Today's activity consisted of numerous C-class flares, predominantly from Region 656 (S13E03). The largest event of the day was a C7/Sf from 656 at 1141 UTC. Region 656 continues to grow and is nearly 1000 millionths in area. The group continues to have a magnetic delta classification. A slow, faint CME was seen in LASCO off the south limb yesterday, beginning at about 10/1854 UTC in C2 imagery. The CME was associated with surge activity and a subsequent EIT wave that was observed just north of 656 and east of central meridian.

Solar activity is expected to be low to moderate. C-flares should continue and there is a good chance for an isolated M-class event during the next three days. There is also a slight chance for a major flare event from 656. Background levels are expected to increase tomorrow with the return of old Region 652 (N07, Carrington = 347).

The geomagnetic field ranged from quiet to active levels. Solar wind data show the continuing influence of a high-speed coronal hole wind stream. The greater than 2 MeV electron fluxes reached high levels during the past 24 hours.

The geomagnetic field is expected to be generally unsettled with a chance for isolated active periods for the next two days (12-13 August). Conditions are expected to be unsettled to active on the 3rd day (14 August) with the arrival of weak transient flow from yesterday's CME.

  觀測的       11 Aug 131
  預測的   12 Aug-14 Aug  140/145/150
  90天平均值        11 Aug 107

  觀測的 Afr/Ap 10 Aug  012/014
  估算值     Afr/Ap 11 Aug  012/013
  預測的    Afr/Ap 12 Aug-14 Aug  010/010-010/010-015/012