Solar activity was low. Only infrequent small subflares occurred. New Region 39 (S12E68), the likely site of the X3 event late on 20 July, rotated fully into view as a moderate-sized group with penumbra on both the leader and trailer spots. Limb proximity hinders magnetic analysis. Other new regions emerging on the disk today are; 40 (S22E01), 41 (N16E22), and 42 (S18E38). Region 30 (N20W86) is beginning its west limb passage, and Region 36 (S07W15) remains the most prominent region visible.

Solar activity is expected to be moderate. Regions 30, 36, and 39 are all possible sites for an isolated event.

The geomagnetic field was at quiet to minor storm levels during the period. Nearly steady southward Bz (5 nT) coupled with enhanced radial speed (500+ km/s), brought intervals of disturbed conditions. A small greater than 10 MeV proton event, likely related to the X3 on 20 July, began at 22/0655 UTC. The tentative maximum is 26 pfu at 22/1635 UTC. Fluxes remain in excess of 20 pfu now. The energetic electron flux at geosynchronous orbit attained high levels again today.

The geomagnetic field is expected to be unsettled for the next three days.

  觀測的       22 Jul 190
  預測的   23 Jul-25 Jul  190/190/195
  90天平均值        22 Jul 161

  觀測的 Afr/Ap 21 Jul  017/019
  估算值     Afr/Ap 22 Jul  015/017
  預測的    Afr/Ap 23 Jul-25 Jul  015/012-010/010-010/010