Solar activity was very low. Region 1589 (N13E22) is the most magnetically complex spot group on the visible disk with a Beta-Gamma-Delta magnetic configuration. No Earth-directed CMEs were observed during the reporting period.

Solar activity is expected to be low with a chance for M-class flares and a slight chance for X-class flares during the forecast period (14-16 October).

The geomagnetic field ranged from quiet to minor storm levels with major to severe storm periods observed at high latitudes. The period began with quiet to unsettled conditions through 13/0300Z. A sustained period of southward Bz to -11 nT for approximately 13 hours resulted in active to minor storm conditions with major to severe storm periods at high latitudes. At about 13/0650Z, the phi angle changed from a negative (toward) orientation to a positive (away) orientation, indicating a solar sector boundary crossing. This was followed by increases in density, temperature, and solar wind speed indicative of a co-rotating interaction region in advance of a coronal hole high speed stream (CH HSS). By 13/1618Z, solar wind speed increased from approximately 530 km/s to 590 km/s while the total magnetic field (Bt) decreased to 5 nT as the CH HSS became geoeffective. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period.

The geomagnetic field is expected to continue at unsettled to active levels with a chance for isolated minor storm periods on day 1 (14 October). Mostly unsettled conditions are expected on day 2 (15 October) due to persistence. By day 3 (16 October), quiet to unsettled conditions are expected as coronal hole effects wane. On days 2-3, there is a slight chance for a greater than 10 MeV proton event at geosynchronous orbit as Region 1589 rotates into a more geoeffective position.

  Observed       13 Oct 125
  Predicted   14 Oct-16 Oct  125/130/130
  90 Day Mean        13 Oct 117

  Observed Afr/Ap 12 Oct  012/014
  Estimated     Afr/Ap 13 Oct  025/036
  Predicted    Afr/Ap 14 Oct-16 Oct  016/018-011/012-007/010