Halo CME Mail

Date: Fri, 16 Aug 2002 13:46

From: Gareth Lawrence

Subject: Full Halo CME on 2002/08/16, frontsided

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UCMEO 93001 20816 1730/
20816 61230 91718 0001/ 360// 333// 41404
20816 61136 91224 21706 10069 1112/
99999

PLAIN

BT

LASCO and EIT observed a full halo CME on 2002/08/16. The
event was first observed in C2 at 12:30 UT as a bright loop
front over the SE limb; by 12:54 UT the C2 occulting disk
was surrounded, though emission in the NW was fainter.
The front first appeared in C3 at 12:42 UT with full
coverage of the C3 occultor by 13:42. SOHO then lost real
time telemtry from 13:50 UT and the data from that gap are
yet to be recovered and processed; we therefore have only
four images for analysis. Based on four data points the
plane of sky speed of the front was measured as 1404 km/s
at PA 117 (SE).

The CME was most probably associated with an M5.2 X-ray flare
and associated prominence eruption in AR0069, which EIT
observed between 11:36 - 12:48 UT with peak emission/activity
at 11:48 centered on S06E17. GOES observed the flare between
11:32 - 12:32 UT with peak emission at 13:07. Both an EIT wave
and dimming were observed in association with this event.

Movies and images of this event are available now at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20020816

and everyone travelling to the high altitude and latitude
of Banff for the SHINE workshop should start hoping for
favourable interplanetary conditions right now!

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 001,                         +1-301-286-3447       |
| Greenbelt, MD 20771.                   Fax:    +1-301-286-0264       |
++