
LASCO Activity Report for
December 9, 2005 SOHO Science Daily Meeting
Planner: K. Schenk, G. Stenborg
Event times are first frame seen in C2 camera unless otherwise noted.
These are preliminary observations for the daily SOHO science discussions.
Final analysis is reported on the Lasco CME list.
An archive of these reports is available.
Points Of Interest
KEYHOLE Operations:
Dec 3 - Dec 20 (26 m)
Dec 6 - Dec 17 (34 m)
EIT CCD bakeout (+ pre and post cal) between
Dec 2 ~ 18:12 UT - Dec 18 21:00 UT.
2005/12/05 (Monday)
13:48 UT E Limb Ragged loop front. Very faint in C3. By 14:12 UT, an
extremely faint and diffuse front starts to be seen
on SE. Difficult to say whether it is associated to
the ragged loop front.
17:48 UT E Limb Another ragged loop front. Also faint in C3, fading
throughout its FOV.
21:36 UT E Limb Bright ragged loop front with apparently twisted
trailing material. It fades throughout C3.
2005/12/06 (Tuesday)
02:12 UT E Limb Apparently circular structure in the trailing material
of event reported to start at 21:36 UT on previous day.
21.12 UT N West Extremely faint loop front starts to be discernible
above the NW limb.
23:24 UT E Limb Ragged front that fades throughout C3.
2005/12/07 (Wednesday)
05:12 UT S West Kind of reconection event ("pair formation") well above
the limb: very faint blob-like front and corresponding
infalling material. Difficult to give an exact time of
first appearance.
15:36 UT S West Another "pair formation" event.
19:12 UT N East Wide and expanding loop front with faint extensions
that extend all above the N Pole up to the W Limb by
19:24 UT. The C2 occulting disk seems to be fully
covered by the extension by 19:48 UT. The event is first
seen in C3 above the ENE Limb at 20:18 UT with very
faint extensions above the N Pole up to the W Limb. By
21:42 UT, the faint extensions make the event appear
as a very faint full halo. The bulk of the ejection
moves mainly toward ENE. The halo signature fades at the
very beginning of next day. GOES reported a B5.5 X-ray
flare on NOAA AR 10830 (N15E14) between 18:41 - 19:10 UT
with peak emission at 18:52 UT.
2005/12/08 (Thursday)
No significant activity.
2005/12/09 (Friday)
See Report on Dec 12, 2005.
Web curator:
K.M.Schenk
NASA Goddard Space Flight Center
Solar Physics Branch / Code 682
Greenbelt, MD 20771