Solar activity was moderate. Region 1532 (S21E33) produced a M2/1n x-ray event at 29/0622Z. No CME is expected in association with this event. There were two CMEs observed during the period. The first, associated with the M6/2n flare on 28 July, was visible in SOHO LASCO and the STEREO coronagraphs with a relatively slow speed (382 km/s estimated) and sourced from the southeast quadrant of the disk. ENLIL model runs suggest a possible weak glancing blow to earth, but beyond the forecast period. The second CME was associated with a erupted filament from the southeast quadrant just after 29/0000Z. Due to a lack of SOHO LASCO imagery, this event is only visible in STEREO A/B COR2, but appears to have a trajectory farther south and east than the first transient, and is not expected to be geoeffective.

Solar activity is expected to be low with the chance for isolated moderate conditions over the next 3 days (30 July - 01 August).

The geomagnetic field began the period at unsettled to active levels due to possible weak coronal hole (CH) effects and intermittent periods of southward Bz. From 06Z-21Z, the field has been quiet.

The geomagnetic field is expected to be unsettled to active on day 1 (30 July) as weak CH effects persist. Quiet to unsettled conditions are expected on day 2 (31 July) as conditions wane. Mostly quiet conditions are expected on day 3 (1 August).

  Pozorováno       29 Jul 131
  Předpovězeno   30 Jul-01 Aug  132/135/138
  90 denní průměr        29 Jul 126

  Pozorováno Afr/Ap 28 Jul  011/011
  Odhadovaný     Afr/Ap 29 Jul  007/008
  Předpovězeno    Afr/Ap 30 Jul-01 Aug  011/012-008/008-004/005