LASCO Activity Report for
July 19, 2002 SOHO Science Daily Meeting

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

Additional stray light in C3 images now removed
during standard image processing.

C2 high-cadence pB sequence campaign now running.
C2 pB sequences being taken every hour at the expense
of 1 normal C2 image and 1 normal C3 image.
Campaign runs to 2002/08/02 (possibly later, TBD)

Planet Jupiter is now obscured by the C2 occulting disk
Planet Mercury is now in C3's field of view, moving R to L

MDI notes a large strong active region with evidence of flux
emergence now in the backsided SE - presumably the source
of this week's large backsided halo CMEs. Should traverse the
SE limb this weekend or early next week (21/22)

2002/07/18

08:06 UT  HALO		Faint front in NW is full halo CME by 08:42
			though faint in S. Fairly fast with small
			amount of trailing material mainly in NW.
			X1.8 X-ray flare AR0030 N19W30

11:42 UT  HALO		Wide bright loop front just visible in E,
			spans ~200 deg crossing both poles by
			12:30, also very faint emission around rest 
			of occulting disk. Backsided

13:31 UT  N East	Fairly wide bright well defined loop 
			front with cavity and core. Some
			gusty outflow follows

14:42 UT  S Pole	Moderately wide ragged loop front
			fades and disintegrates through C2	

16:06 UT  W Limb	Narrow ragged front along streamer

19:31 UT  HALO		Wide bright loop front well into C2 is
			full halo CME by 20:06. Fast event,
			much prolonged outflow particularly 
			in E including some core-like material. 
			Backsided

2002/07/19

01:31 UT  W Limb	Ragged nebulous front fades and disintegrates
			through C2. Some faint continued outflow

06:06 UT  N West	Very faint loop front

09:30 UT  N East	Moderately bright asymmetric front
			with cavity, possibly residual to
			previous day's halo event