Solar activity was moderate. Region 365 (S07W84) produced an M1/Sf flare at 01/1652 UTC as well as a few other smaller flares during the past day. The most active sunspot group has been new Region 375 (N11E74) which produced three M1 flares during the reporting period: at 01/0306 UTC, 01/0711 UTC, and 01/1250 UTC. This region is just visible at the eastern limb as a D-type sunspot group. More of the region is expected to come into view by tomorrow.

Solar activity is expected to be moderate to high. M-class activity is expected from both 365, as it departs the visible disk, and 375 as it comes into view. There remains a slight chance of a major flare from either region.

The geomagnetic field has been quiet to active.

The geomagnetic field is expected to be unsettled to active with the possibility of isolated minor storm periods for the duration of the three-day forecast period. A high-speed coronal hole stream is expected to influence activity by 03 June.

  觀測的       01 Jun 112
  預測的   02 Jun-04 Jun  105/100/100
  90天平均值        01 Jun 124

  觀測的 Afr/Ap 31 May  018/017
  估算值     Afr/Ap 01 Jun  018/018
  預測的    Afr/Ap 02 Jun-04 Jun  018/020-020/030-020/030