
LASCO Activity Report for
January 10, 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
2005/01/07 (Friday)
10:30 UT EN East Bright loop front. EIT 195 observes a backsided CME
starting at 09:48 UT. It fades throughout C3. Some
infalling material afterward in C2.
21:54 UT EN East Ragged loop front that fades close to the inner edge
of C3, followed at 23:54 UT by a faint and diffuse
ragged front on E Limb.
2005/01/08 (Saturday)
03:54 UT E Limb Jet- like front. Infalling material to N. Another
narrow front at ~ 09:54 UT.
06:06 UT S East Expanding loop front. Faint extensions can be seen
ahead of the event in C3, spanning up to above the S
Pole (starting at around 08:42 UT). The whole event
fades throughout C3. No visible signatures on EIT 195
running difference images.
06:30 UT N West Expanding loop front fainter than previous event on SE
(and apparently slower). It apparently fades throughout
C2. No visible signatures of the event on EIT 195
running difference images.
13:54 UT N Pole Extremely faint and not-well-defined front developing
toward NNW, followed at 16:30 UT by faint ragged front.
An expanding front that later extends all above the N
Pole, from NW to NE, appears by around 20:30 - 20:58 UT.
Also by 20:58 UT, a faint and expanding loop front is
seen appearing on NE, though it is difficult to
disentangle the different structures involved. EIT 195
show no signatures of the event, except for the release
expulsion of material on NE starting at around 18:12 UT.
17:54 UT W Limb Faint and very diffuse elongated front preceding a
ragged and expanding and elongated loop-like front
(first seen at around 18:54 UT) that fades close to
the inner edge of C3.
2005/01/09 (Sunday)
02:30 UT N East Bright loop front and twisted trailing structure. EIT
195 images show a backsided CME starting at around
01:48 UT on ENE Limb. Mean plane-of-sky speed based
on C3 data: ~ 600 km/sec at PA ~ 52. Angular span at
09:18 UT (C3): ~ 70 deg, from PA 19 - 89.
03:54 UT NN West Faint loop front that fades throughout C3.
06:06 UT S West Jet-like front.
07:31 UT WS West Elongated and ragged loop front a little to N of
previous event (jet) superposed in the LOS with a
narrow and elongated fan-like front. They fade
throughout C3.
09:06 UT E Limb Bright and wide loop front. Mean plane-of-sky speed
based on C3 data: ~ 820 km/sec at PA ~ 115. Angular
span at 12:42 UT (C3): ~ 130 deg, from PA 40 - 170.
Many ragged fronts all above the eastern limb (from
NE to SE) along the rest of the day. GOES recorded an
M2.4 X-ray flare from NOAA AR 10719 (S09E70) between
08:25 - 09:09 UT with peak emission at 08:51 UT. Also
a C2.6 X-ray flare between 14:33 - 14:56 UT with peak
emission at 14:47 UT on the same AR (S09E68) - both
during a long duration X-ray event. Signs of a wave to
S and SSW of the AR on EIT 195 images.
2005/01/10 (Monday)
00:30 UT ES East Ragged front immediately followed (to N) by a fainter
front developing faster. Infalling material on E.
Another ragged front on ENE.
11:30 - 14:30 UT Temporary Data Gap.
Web curator:
K.M.Schenk
NASA Goddard Space Flight Center
Solar Physics Branch / Code 682
Greenbelt, MD 20771