Solar activity was high. An X3/1f flare occurred at 24/0112 UTC in Region 69. This region has rotated out of view beyond the west solar limb near SW08. The flare was accompanied by Type II/IV radio sweeps and discrete radio bursts that included 1200 sfu output at 2695 MHz. Region 87 (S07E47) also produced an M1/1n flare at 24/0548 UTC. Other regions of note include 83 (S18W27) and 85 (S09E03). Both produced flares today but without significant x-ray output. New Region 89 (S16E62) rotated into view.

Solar activity is expected to be moderate. M-class activity is possible in Regions 83, 85, and 87.

The geomagnetic field was quiet to unsettled. A greater than 100 MeV proton event began at 24/0130 UTC, reached a 29 pfu peak at 24/0210 UTC, and dropped below the 1 pfu event threshold at 24/1825 UTC. A greater than 10 MeV proton event began at 24/0140 UTC, reached a 317 pfu peak at 24/0835 UTC, and remains in progress. The current proton flux is about 200 pfu. These proton events are associated with the X3 flare discussed in Part IA.

The geomagnetic field is expected to become unsettled to active over the next day or two in response to flare/CME activity of the past few days. The greater than 10 MeV proton event is expected to continue in progress for the next 24-48 hours.

  觀測的       24 Aug 196
  預測的   25 Aug-27 Aug  190/185/180
  90天平均值        24 Aug 170

  觀測的 Afr/Ap 23 Aug  006/011
  估算值     Afr/Ap 24 Aug  012/015
  預測的    Afr/Ap 25 Aug-27 Aug  015/020-015/020-015/020