Solar activity has been at high levels for the past 24 hours with multiple M-class solar flares observed. Region 1476 (N12E08) was responsible for almost all of the activity with 3 M-class events observed, the largest being a M5/2b event at 10/0418Z. Associated with these events, were discrete frequency radio bursts, Tenflares, and even a Type IV radio sweep. Region 1476 has shown mixed growth and shear effects across the polarities as it continues to evolve. A weak Earth directed CME was observed in STEREO COR2 A and B imagery early in the period. Analysis and current models show this CME joining the current coronal hole high speed stream (CH HSS). Region 1477 (S22E47) was split into two regions today as SDO magnetogram data indicated the leader and follower sunspot groups were actually two magnetic bipoles. Leader group is Region 1477 and follower group is now Region 1478 (S24E55).

Solar activity is expected to be at moderate levels with a slight chance for X-class events for the next three days (11 - 13 May) as Region 1476 continues to grow and evolve.

The geomagnetic field has been at quiet to active levels for the past 24 hours with an isolated minor storm period observed at high latitudes. Solar wind measurements, as observed by the ACE spacecraft, showed a continued increase in solar wind speeds to around 620 km/s, a drop off in solar wind density, and the total IMF began to stabilize around 5 nT. These characteristics are indicative of a CH HSS. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period.

The geomagnetic field is expected to be at quiet to unsettled levels with a chance for active periods for the next three days (11 - 13 May). The increased activity is due to both the continued CH HSS effects and three weak, slow moving CMEs intertwined within.

  Observé       10 May 131
  Prévisionnel   11 May-13 May  130/130/130
  Moyenne des 90 derniers jours        10 May 113

  Observé Afr/Ap 09 May  019/025
  Estimé     Afr/Ap 10 May  010/010
  Prévisionnel    Afr/Ap 11 May-13 May  012/012-010/012-006/010