Solar activity was at low levels. Region 105 (S08E03) produced a C1/Sf flare at 12/2337 UTC, which was the largest during the period. Even so, it remains the largest and most magnetically complex region on the visible disk. It's dominant trailing spot retains a beta-gamma-delta magnetic configuration. Region 103 (N16W58) showed some decay in penumbral coverage and exhibited no significant activity today. Region 107 (N11E03) underwent little change and was quiescent during the period. No new regions were numbered today.

Solar activity is expected to be at low to moderate levels. M-class activity remains possible from regions 105 and 107.

The geomagnetic field ranged from quiet to minor storm levels. An isolated period of minor storm conditions existed at mid-latitudes from 13/0600 to 0900 UTC. Coronal hole high speed stream effects continued to be the main source of the elevated activity. The greater than 2 MeV electron flux at geosynchronous orbit exceeded event threshold at 13/1620 UTC, reached a maximum value of 1070 pfu at 13/1805 UTC, and fell below threshold at value at 13/1810 UTC.

The geomagnetic field is expected to be at quiet to active levels through the first day of the period as the coronal hole high speed stream effects subside. A return to quiet to unsettled conditions are expected for the remainder of the forecast period. Greater than 2 MeV flux at geosynchronous orbit may be elevated into day one of the period.

  觀測的       13 Sep 206
  預測的   14 Sep-16 Sep  205/200/190
  90天平均值        13 Sep 175

  觀測的 Afr/Ap 12 Sep  009/017
  估算值     Afr/Ap 13 Sep  012/014
  預測的    Afr/Ap 14 Sep-16 Sep  012/012-008/008-008/008