Solar activity increased to high levels. An abundance of activity was observed today, most of which occurred in Region 338 (N18W71). Region 338 produced a very impulsive M7.0 x-ray flare at 26/0807Z. This region also produced an M2.1/1f flare at 26/0058Z and an M2.1/Sn flare at 26/0306Z along with multiple C-class events. The delta magnetic complex remains intact and penumbral coverage appears to be oscillating with this regions flare production. Region 344 (N16E13) has yet to produce any flare activity although the white-light penumbral coverage and the magnetic complexity of this region have shown rapid growth during the past 24 hours. Yesterday, this region was a simple beta complex which has since developed into a beta-gamma-delta magnetic structure. Region 337 (S14W26) was quiescent through most of the period. Regions 347 (S20E36), 348 (S36E58), and 349 (S14E60) were newly numbered today.

Activity is expected to be at moderate levels. Region 338 remains capable of producing an isolated major flare.

The geomagnetic field was at quiet to active levels. Influences from yesterdays favorably positioned coronal hole have waned as the solar wind speed has dropped to approximately 400 km/s. The greater than 2 MeV electron fluxes reached high levels today.

The geomagnetic field is expected to be at unsettled to active levels. Minor storm conditions are possible with the onset of a favorably positioned coronal hole on days one and two. Elevated field levels are possible through the interval due to weak transient passages resulting from the flare activity of the past several days.

  Geobserveerd       26 Apr 144
  Voorspeld   27 Apr-29 Apr  150/145/140
  90 dagen gemiddelde        26 Apr 126

  Geobserveerd Afr/Ap 25 Apr  019/032
  Geraamd     Afr/Ap 26 Apr  010/015
  Voorspeld    Afr/Ap 27 Apr-29 Apr  020/025-015/020-012/015