Solar activity was at very low levels. Region 1271 (N17W56) decayed in area and spot count, but developed a Delta magnetic configuration in the large leader spot. The region produced numerous low-level B-class events. Three new regions were numbered during the period. In the western hemisphere, new Region 1278 (N16W40) emerged as a simple 4-spot bi-polar group. On the eastern limb, new Region 1277 (N17E62) and new Region 1279 (N14E75) both rotated onto the disk as large, uni-polar H-type groups. Region 1277 produced a B9 x-ray event at 25/0702Z while Region 1279 produced another B9 x-ray event at 25/1652Z. The SOHO LASCO satellite observed a slow-moving CME off the east limb, first observed in C2 imagery at 25/0856Z with an estimated plane-of-sky speed of 420 km/s. This CME does not appear to have an Earthward directed component.

Solar activity is expected to be low with a slight chance for an M-class event all three days (26 - 28 August).

The geomagnetic field was at quiet levels. Observations from the ACE spacecraft indicated a steady decline in solar wind velocity during the period from about 500 km/s to near 400 km/s. The Bz component of the interplanetary magnetic field did not vary much beyond +/- 4 nT while the phi angle remained negative (toward) throughout the period.

The geomagnetic field is expected to remain at quiet levels for days one and two (26 - 27 August). By day three (28 August), activity levels are expected to increase to quiet to unsettled, with isolated active periods, due to a geoeffective, recurrent coronal hole high speed stream.

  Observé       25 Aug 104
  Prévisionnel   26 Aug-28 Aug  110/115/115
  Moyenne des 90 derniers jours        25 Aug 097

  Observé Afr/Ap 24 Aug  005/006
  Estimé     Afr/Ap 25 Aug  005/005
  Prévisionnel    Afr/Ap 26 Aug-28 Aug  005/005-005/005-007/010