Solar activity was very low. No flares occurred during the past 24 hours and the solar disk continues to be spotless.

Solar activity is expected to be very low.

The geomagnetic field ranged from quiet to active levels during the past 24 hours. Conditions were initially unsettled but increased to predominantly active levels from 0000-1500Z. A particularly notable substorm was observed between 0900-1200Z, which elevated some high latitude sites to storm level activity. Activity levels have declined to quiet to unsettled levels since 1500Z. Solar wind signatures showed an increase in velocity from initial values of about 500 km/s to about 650 km/s by 0800Z. Solar wind velocity continued to be elevated in the 600-650 km/s range through the remainder of the day. The solar wind observations were all consistent with a high speed stream from a favorably positioned coronal hole.

The geomagnetic field is expected to be mostly quiet to unsettled with a chance for isolated active periods for the first day (27 June) while the solar wind velocity remains elevated. Conditions are expected to decline to quiet to unsettled levels for the second day (28 June) and predominantly quiet for the third day (29 June).

  觀測的       26 Jun 065
  預測的   27 Jun-29 Jun  065/065/065
  90天平均值        26 Jun 069

  觀測的 Afr/Ap 25 Jun  010/012
  估算值     Afr/Ap 26 Jun  012/015
  預測的    Afr/Ap 27 Jun-29 Jun  010/010-007/008-005/005