Date: Mon, 16 Jun 2003 19:34
From: Gareth Lawrence
Subject: 'Full Halo CME' on 2003/06/15, probably frontsided
Status: O
UCMEO 93001 30616 2315/
30615 62354 90342 0001/ 360// 233// 42002
30615 62348 90024 27805 10386 1222/
99999
PLAIN
BT
LASCO and EIT observed a 'full halo CME' on 2003/06/15. The
event was first observed in C2 at 23:54 UT as a bright loop
front over the E limb; this had developed to a full halo
CME by 00:30 UT, albeit faint in the E. The front first
appeared in C3 at 00:18 UT with full coverage of the C3
occultor by 01:42 UT. The mean plane-of-sky speed for this
event was 2002 km/s at PA87 , with possible evidence for
moderate deceleration, though this could easily be due to
significant measurement errors of the faint front far into
the C3 field of view.
The CME was probably most associated with an X1.3 X-ray flare
observed by EIT between 23:48 - 00:24 UT, centered at S05E78
with peak emission at 00:00. GOES records this flare from
AR 0386 (probably old AR 0365) at S07E80 between 23:25 - 00:25 UT
with peak emission at 23:56 UT. No obvious EIT wave nor dimming
were observed in association with this event. Considering the
location of the flare and the faint emission in the W hemisphere
this event has been determined probably frontsided.
Movies and images of this event are available at:
ftp://ares.nrl.navy.mil/pub/lasco/halo/20030615
Apologies for the rather late sending of this report. I am
attending the AAS-SPD meeting in Laurel, MD all week. If
similar activity continues from AR 0386, please bear in
mind that these reports will not appear until late in
the day.
Best wishes,
Gareth Lawrence.
+----------PLEASE NOTE NEW EMAIL ADDRESS-----------+
Gareth Lawrence, grl@grace.nascom.nasa.gov
SOHO-LASCO Operations Scientist,
CUA, MC 682.3, Bldg 26, Rm 001, F: +1-301-286-0264
NASA Goddard Space Flight Center,
Greenbelt, MD 20771. P: +1-301-286-2941
+