Halo CME Mail

Date: Wed, 17 Jul 2002 11:06

From: Gareth Lawrence

Subject: Full Halo CME on 2002/07/15, frontsided (fwd)

Status: O

It has come to my attention that the report for the full halo CME
of 2002/07/15 may not have been dispatched to all its intended 
recipients. In light of this I am re-sending the report. Apologies
to those who receive it twice.

Best wishes,
  Gareth Lawrence.

++
| Gareth Lawrence,                   E-mail:grl@kreutz.nascom.nasa.gov |
| SOHO-LASCO Operations Scientist,				       |
| CUA, Mail Code 682.3,                                                |
| NASA Goddard Space Flight Center,      Phone:  +1-301-286-2941       |
| Building 26, Room G-1,                         +1-301-286-3447       |
| Greenbelt, MD 20771.                   Fax:    +1-301-286-0264       |
++


---------- Forwarded message ----------
Date: Mon, 15 Jul 2002 17:14:12 -0500 (EST)
From: Gareth Lawrence 
To: Gareth Lawrence 
Subject: Full Halo CME on 2002/07/15, frontsided

UCMEO 93001 20715 2300/
20715 62030 ///// 0001/ 360// 233// 41078
20715 62000 92024 10114 10030 1122/
99999
 
PLAIN
 
BT


LASCO and EIT observed a full halo CME on 2002/07/15. The 
event was first observed in C2 at 20:30 UT as a bright loop 
front over the NE limb; by 21:06 UT the C2 occulting disk 
was surrounded and the leading edge was at or slightly beyond
the edge of the field of view. The front first appeared in C3 
at 21:18 UT with full coverage of the C3 occultor visible. 
The plane of sky speed of the front was measured as 1078 km/s 
at PA 30 (NE). Only three data points are available at this
time as a result of limitations due to the present science
plan, so it is inappropriate to speculate as to whether an
acceleration was discernible.

The CME was most probably associated with an X3.0 X-ray flare
in AR0030, which EIT observed between 20:00 - 20:24 UT with 
peak emission at 20:12 centered on N14E01. GOES observed the 
flare between 19:59 - 20:14 UT with peak emission at 20:08. 
A highly restricted and directed EIT wave was observed in 
association with this event, primarily directed by the large
filament channel to the N and W. No dimming was observed 

Some preliminary images of this event are available now at: 
 
ftp://ares.nrl.navy.mil/pub/lasco/halo/20020715

and these will be updated and augmented with movies once a
better and more complete dataset is available (this will
probably be possible tomorrow morning).

Best wishes,
        Gareth Lawrence.

++
| Gareth Lawrence,                   E-mail:grl@kreutz.nascom.nasa.gov |
| SOHO-LASCO Operations Scientist,				       |
| CUA, Mail Code 682.3,                                                |
| NASA Goddard Space Flight Center,      Phone:  +1-301-286-2941       |
| Building 26, Room G-1,                         +1-301-286-3447       |
| Greenbelt, MD 20771.                   Fax:    +1-301-286-0264       |
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