Solar activity was moderate. Region 1520 (S16E19) produced three M-class events during the period, the largest an M2/1f flare at 10/0627Z. The region grew slightly in area and spot count and maintained a complex beta-gamma-delta magnetic configuration. Other activity included a C4/1f flare at 10/0834Z from Region 1519 (S16W04) and a C8/Sf flare at 10/1345Z from Region 1521 (S22E05). Region 1521 indicated some elongation along its E/W axis while Region 1519 decayed from a B-type group to a single H spot. No Earth-directed CMEs were observed during the previous 24 hours.

Solar activity is expected to be moderate with a slight chance for X-class events for the next three days (11 - 13 July).

The geomagnetic field was at predominately quiet to active levels with isolated minor storm intervals from 09/2100 - 2400Z. This activity was most likely a result of residual CME effects from recent flare activity from old Regions 1513 (N17, L=220) and 1515 (S17, L=206). ACE solar data indicated wind velocities steadily increased through the period from 400 km/s to near 500 km/s. The Bz component of the interplanetary magnetic field was generally south throughout the period ranging between -5 to -10 nT while interplanetary field strength ranged between 6 to 12 nT. At about 09/2100Z, the phi angle switched from a negative (toward) orientation to a positive (away) orientation. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period.

The geomagnetic field is expected to be at mostly quiet to unsettled levels for the next three days (11 - 13 July).

  Observé       10 Jul 173
  Prévisionnel   11 Jul-13 Jul  170/165/165
  Moyenne des 90 derniers jours        10 Jul 126

  Observé Afr/Ap 09 Jul  029/038
  Estimé     Afr/Ap 10 Jul  012/012
  Prévisionnel    Afr/Ap 11 Jul-13 Jul  007/010-005/005-005/005