Solar activity was at moderate levels today. Region 652 (N08W89) produced the largest event of the period, an M2 x-ray flare that occurred at 29/0006Z. Although, the most significant event during the period was a long duration C2 x-ray flare. There was an associated partial halo CME with this flare that may result in an glancing blow from the anticipated transient passage. The beta-gamma magnetic structure remains unchanged as Region 652 rotates beyond the solar west limb. Region 654 (N08W02) was quiescent today and is the only other spotted active region on the visible disk. No new regions were numbered today.

Solar activity is expected to be at very low to moderate levels. Region 652 may yet produce another M-class flare before rotating completely beyond the solar west limb through day one (30 July). Expect activity to decrease to very low to low levels by 31 July.

The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached very high levels today.

The geomagnetic field is expected to range from quiet to minor storm levels throughout the period. The elevated conditions are expected due to the anticipated shock passages from the CME activity seen on LASCO imagery from the long duration C4 that occurred early yesterday and the C2 that occurred today.

  觀測的       29 Jul 100
  預測的   30 Jul-01 Aug  095/090/085
  90天平均值        29 Jul 106

  觀測的 Afr/Ap 28 Jul  011/014
  估算值     Afr/Ap 29 Jul  008/010
  預測的    Afr/Ap 30 Jul-01 Aug  020/030-015/020-015/020