Solar activity increased to high levels. Region 9825 (N16W81) produced an impulsive M5/1n flare at 20/0612 UT associated with Type II and IV radio sweeps and an Earth-directed halo coronal mass ejection (CME). Region 9825 also produced an impulsive M4 flare at 20/0251 UT associated with Type II and IV radio sweeps and an impulsive M4 at 20/0959 UT. This activity appeared to coincide with the rapid emergence of opposite-polarity flux northwest of the leader spots, but detailed analysis was hampered by its proximity to the west limb. Region 9830 (S16W06) remained the largest and most magnetically complex sunspot group on the disk as multiple magnetic delta configurations persisted within its leader spots. It produced an impulsive C9/1n flare at 20/1626 UT associated with minor discrete radio emission. New Region 9835 (S08W61) produced an impulsive M3/Sf flare at 20/1711 UT. New Regions 9836 (S02W26) and 9837 (N07E70) were also numbered.

Solar activity is expected to be at moderate to high levels. M-class flares are expected. There is a chance for isolated major flare activity from Region 9825 (which will cross the west limb on 21 February) and Region 9830.

Geomagnetic field activity was at quiet to unsettled levels. A brief greater than 10 MeV proton event at geosynchronous orbit began at 20/0730 UT, reached a maximum of 13.5 PFU at 20/0755 UT, and ended at 20/0800 UT. This proton event was likely associated with the M5/1n flare at 20/0612 UT from Region 9825.

Geomagnetic field activity is expected to be at quiet to unsettled levels during 21- 22 February. Field activity is expected to increase to unsettled to minor storm levels on 23 February due to an expected CME passage associated with today's M5/1n flare. There will be a slight chance for a proton flare during the period.

  觀測的       20 Feb 193
  預測的   21 Feb-23 Feb  200/205/205
  90天平均值        20 Feb 222

  觀測的 Afr/Ap 19 Feb  004/004
  估算值     Afr/Ap 20 Feb  010/008
  預測的    Afr/Ap 21 Feb-23 Feb  007/008-012/015-016/020