Halo CME Mail

Date: Tue, 23 Jul 2002 20:47:24 +0000 (GMT)

From: Kevin Schenk

Subject: Full HALO CME Event 2002/07/23

  ------------------------------------------------------------------------

UCMEO 93001 20723 2000/
20723 70042 90318 0901/ 089// 133// 32170
20723 60024 80236 21372 10039 1122/
99999

BT

Lasco and EIT observed a full HALO CME event on 2002/07/23.  The event was
first observed in the C2 field at 2002/07/23 00:42 UT as a bright loop
front over the East limb with LE already to 3Rs at PA 90 degrees.
Material was at all angles by 01:31 UT. The event entered C3 at 02:18 at
20Rs and tracked to 30 Rs by 03:18.  The plane of sky speeds through both
fields at PA 90 degrees calculated to 2170 km/sec.  A slower wave front
over PA 273 degrees only totaled 359 km/sec.  A very impulsive shock in
the East quadrent.

EIT sees a flare from AR 10039 located [S13; E72] at 00:24 UT with
brightening till 02:26 UT.  A westward wave is seen with material to both
front and backside (along limb) of disk.  GOES shows a X4.8 x-ray flare of
AR 10039 at the same period.  This flare is probably the event seen by EIT
and LASCO.

Images and movies are available on the Lasco servers at:

ftp://lasco6.nascom.nasa.gov/pub/lasco/halo/20020723/

Best reguards

Kevin Schenk
EIT and LASCO Operations
NASA-Goddard Space Flight Center, USA