RSGA auch interessant: interaction - Variante von 3 CME und Neugier, was da los war (Vorhersage-Modell nach späten Bildern noch mal gerechnet).
Hab auch eben gestaunt, dass ich bei den so schon hohen 1473 km/s, die ich gestern als Maximalwert gefunden hatte, noch ca. mit 88% hätte rechnen müssen. Eben noch Speed vom M 3.8 getestet: Lag auf 220° (SE) in den Stunden zwischen 2118 und 0018UT bei 1399,1362 und 1288 km/s. Scheint also auch so keine Behinderung für den M 9.9 gewesen zu sein, um auf ganz erstaunliche 31 h plus/minus Minuten zu kommen. Jedenfalls wurde im Chat gaaaaanze Arbeit geleistet
Gruß Herwig
IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z:
Geomagnetic field activity ranged from quiet to severe storm levels.
The onset of storm conditions began with two sudden impulse
observations: 20nt at 24/0500 UTC, followed by 80nt at 24/0555 UTC.
The shock passages enhanced the already high 10 MeV proton integral
flux to a peak value of 18900 pfu at 24/0555 UTC. Severe storm
conditions were evident in planetary K-index values during
24/0600-1800 UTC. This event is the likely result of interaction
among up to three interplanetary shock propagations from separate
CME events during 21-23 November, indicated by re-analysis of shock
arrival model predictions with improved event velocity data.
Results suggest that the CMEs may have merged into the single
interplanetary shock that passed the earth today. The 10 MeV proton
event and associated polar cap absorption remained in progress at
the end of the period, however the 100 MeV proton event ended at
24/1200 UTC.
IIB. Geophysical Activity Forecast: Geomagnetic field activity may
persist with isolated active and minor storm conditions for the next
48 hours, in the wake of today's shock passage. Conditions are
expected to return to quiet to unsettled conditions by day three.
The 10 MeV proton event is expected to continue to wane over the
next 24 hours.