Hallo!
Hier als Nachtrag noch die Halo Mail.
Zusammenfassend wird darin gesagt, dass der Großteil des CME's höchstwahrscheinlich von der Rückseite stammt.
Gruß
Ulrich
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LASCO/EIT observed a 'partial' halo CME on 2004/01/11.
The event was first observed in C2 at 20:30 UT
as a bright loop front emerging from the SE limb.
Following frames show a well defined loop with
strong cavity and twisted inner structure spanning
~140 deg from PA 80 - 220 as measure in C3 at 06:18 UT
on 2004/01/12. Loop-shaped outflow follows at S Pole.
The mean plane-of-sky speed for this event averaged
400 km/s measured at PA ~125 based on C3 data.
Worth mentioning is that on 2004/01/12 at 06:30 UT a
ragged fan-like front appears on the E limb (at roughly
the position of the northern leg of the event). Moreover,
at PA ~165 another narrow ragged front appears in C2 at
10:06 UT.
At around the time of the starting of the event no related
activity is seen on EIT/FeXII images. However, i) on 2004/01/12
between 06:48 and 07:13 UT a prominence is seen to erupt
towards N on the East limb most likely related to the fan
observed in C2. Likewise, at around 07:00 UT a very faint part of
a filament in the SE quadrant seems to lift off very slowly,
most likely being the material responsible for the feature
seen at PA ~165 mentioned above.
This event has therefore been determined most probably
backsided, though at the end some prominence material seem
to be ejected earthwards.
Movies and images of this event will shortly be
available at:
ftp://ares.nrl.navy.mil/pub/lasco/halo/20040111
Best regards
Guillermo Stenborg
