Solar activity has been high. Region 501 (N02W18) produced an M9.6/2b flare at 20/0747 UTC with an associated Type IV radio sweep and a 9700 pfu tenflare. This flare also produced a CME with an estimated velocity of 700 km/s. Region 507 (N07E49) produced a C8.6 at 20/1929 UTC. All regions on the disk were stable in size. Two regions increased in complexity: Region 501 developed into a Beta-Gamma-Delta magnetic configuration, and Region 508 (S20E58) developed into a Beta-Gamma configuration.

Solar activity is expected to be moderate to high. Regions 501, 507 and 508 are capable of producing major flares.

The geomagnetic field has been at quiet to severe storm levels. A CME shock arrived at SOHO/MTOF and was observed at 20/0740 UTC, and a geomagnetic sudden impulse was observed at 0805 UTC. A very strong (55 nT) southward component of the interplanetary magnetic field resulted in severe geomagnetic storming during the latter half of the day. Magnetopause crossings were observed at both main GOES satellites, at 1301 UTC for GOES 12 and at 1628 UTC for GOES 10. The greater than 2 MeV electrons at geosynchronous orbit dropped below high levels early in the day and have remained below threshold. The M9 flare produced elevated 10 MeV proton levels at geosynchronous orbit, but this activity did not cross event thresholds.

The geomagnetic field is expected to be unsettled to active all three days, with major storm conditions possible early on 21 November from the lingering effects of the geomagnetic storm in progress. Minor storming is possible on 22-23 November from a CME shock arrival originating from the M9 flare observed earlier today.

  Observeret       20 Nov 175
  Forudsagt   21 Nov-23 Nov  180/190/200
  90 dages gennemsnit        20 Nov 128

  Observeret Afr/Ap 19 Nov  012/014
  Anslået     Afr/Ap 20 Nov  105/115
  Forudsagt    Afr/Ap 21 Nov-23 Nov  040/045-025/035-015/020