Solar activity was very low. Region 1548 (N18E18) produced the largest event of the period, a B6/Sf flare at 22/1658Z. The remaining numbered regions were stable and quiet. A full halo CME was observed in SOHO/LASCO C2 coronagraph imagery beginning at 21/2024Z with an estimated plane-of-sky speed of 884 km/s. STEREO-A and STEREO-B COR2 imagery shows this CME to be a back-sided event and is not expected to be geoeffective. SDO/AIA 193 imagery showed a filament eruption in the vicinity of plage Region 1549 (S18W72) at approximately 22/0930Z. A CME was subsequently observed in LASCO/C2 coronagraph imagery at 22/1012Z, and in LASCO C3 imagery at 22/1118Z. Analysis is underway to determine the potential geoeffectiveness of this event.

Solar activity is expected to be very low with a slight chance for C-class flares for the next three days (23-25 August).

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

The geomagnetic field is expected to be predominately quiet for days 1-3 (23-25 August).

  Observed       22 Aug 095
  Predicted   23 Aug-25 Aug  095/100/100
  90 Day Mean        22 Aug 124

  Observed Afr/Ap 21 Aug  007/006
  Estimated     Afr/Ap 22 Aug  005/006
  Predicted    Afr/Ap 23 Aug-25 Aug  006/005-006/005-005/005