Solar activity was low during the past 24 hours. Several C-class events were observed. The largest of these was a C5/Sf flare at 1210 UTC from Region 9454 (N13E46). Region 9454 is currently the largest sunspot group on the disk and has some magnetic complexity. Region 9455 (S16E03) grew steadily during the past 24 hours and produced the majority of today's C-class events. Newly assigned Region 9456 (N06W04) emerged on the disk during the past 24 hours.

Solar activity is expected to be low to moderate. There is a fair chance for an isolated M-class event during the next three days from any of regions 9454, 9455, or 9456. Of these, Region 9455 appears to be the best candidate for continued flare activity.

The geomagnetic field ranged from quiet to major storm levels during the past 24 hours. Unsettled to active levels predominated most of the day, but the period from 0900-1500Z saw minor storm levels at mid-latitudes and major storm levels at high latitudes.

The geomagnetic field is expected to be unsettled to active for the next 24 hours. Predominantly unsettled levels should prevail during the second and third days.

  觀測的       12 May 138
  預測的   13 May-15 May  140/142/144
  90天平均值        12 May 167

  觀測的 Afr/Ap 11 May  005/009
  估算值     Afr/Ap 12 May  025/035
  預測的    Afr/Ap 13 May-15 May  015/015-012/010-010/010