Solar activity decreased to low levels. Regions 39 (S14W30), 44 (S20W33), and 50 (S08W19) produced isolated C-class subflares. Region 39 began to gradually decay and simplify, but retained a weakened delta magnetic configuration within its leader spots as well as a delta in its trailer spots. Region 44 also began to slowly decay, but retained a magnetic delta configuration within its intermediate spots. Region 50 appeared to stabilize as a E-type group of moderate size and complexity.

Solar activity is expected to be moderate. Isolated M-class flares are expected from Regions 39 and 44. Either region could produce a major flare during the period. Region 50 could also produce an isolated M-class flare during the period.

Geomagnetic field activity was at quiet to unsettled levels during the period.

Geomagnetic field activity is expected to be at unsettled levels on 31 July. Field activity is expected to increase to unsettled to active levels during 01 - 02 August. There is a slight chance for a proton event during the period.

  觀測的       30 Jul 227
  預測的   31 Jul-02 Aug  220/220/215
  90天平均值        30 Jul 167

  觀測的 Afr/Ap 29 Jul  009/011
  估算值     Afr/Ap 30 Jul  007/012
  預測的    Afr/Ap 31 Jul-02 Aug  010/010-012/015-015/015