Solar activity was moderate. Region 1260 (N18E30) produced a M1/1n flare at 1607Z as well as numerous C-class flares during the past 24 hours. This region showed some magnetic complexity (magnetic class beta-gamma) and changed steadily throughout the day. Region 1261 (N15E60) is the largest group on the disk (250 millionths) but is a simple magnetic beta group and only produced one subflare during the day. New Region 1262 (N16W38) was assigned and is a small D-type group with a weak delta configuration in the trailing portion of the group. Despite its magnetic complexity 1262 did not produce any flares. The eruption of a filament from the northeast quadrant was observed at about 0620Z and was associated with a faint, slow coronal mass ejection off the northeast limb as observed by the LASCO C2 coronagraph beginning at 0642Z.

Solar activity is expected to be predominantly low but there is a chance for additional isolated M-class flares from Region 1260.

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

The geomagnetic field is expected to be quiet for the next three days (28-30 July). Recent analysis from Stereo-B and solar imagery suggest that the previously anticipated high speed stream from a coronal hole is most likely to start affecting Earth on 31 July.

  Observé       27 Jul 099
  Prévisionnel   28 Jul-30 Jul  100/100/105
  Moyenne des 90 derniers jours        27 Jul 095

  Observé Afr/Ap 26 Jul  005/005
  Estimé     Afr/Ap 27 Jul  005/005
  Prévisionnel    Afr/Ap 28 Jul-30 Jul  005/005-005/005-005/005