Solar activity remained very low. No significant flares occurred during the past 24 hours.

Solar activity is expected to be at very low to low levels.

The geomagnetic field ranged from quiet to major storm levels. An interval of major to severe storm conditions was observed at the Boulder magnetometer between 14/0600Z and 1200Z. The interplanetary magnetic field strengthened, and the Z-component rotated smoothly from 13/1500Z through 14/1200Z from 17 nT through a maximum negative value of -15 nT. Solar wind speeds ranged from approximately 480 km/s to 570 km/s. The unusual solar wind conditions appear to be consistent with a corotating interaction region that may have been complicated by the presence of transient flow. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.

The geomagnetic field is expected to be unsettled to active. Isolated periods of minor to major storm conditions are possible on 15-16 April due to a coronal hole high speed stream. Predominantly unsettled conditions will return on 17 April.

  觀測的       14 Apr 079
  預測的   15 Apr-17 Apr  080/080/080
  90天平均值        14 Apr 080

  觀測的 Afr/Ap 13 Apr  009/013
  估算值     Afr/Ap 14 Apr  032/040
  預測的    Afr/Ap 15 Apr-17 Apr  025/030-020/025-015/015