LASCO and EIT observed a full halo CME on 2001/04/06. The event
was first observed in C2 at 19:30 UT as a bright wide front in
the SE. The C2 occulting disk was surrounded by 19:54 although
emission over the N pole was faint. The bright front first appeared
in C3 at 19:42 with the C3 occultor surrounded by 20:18. The plane
of sky speed of the fastest region of the front was measured as
1103 km/s at PA 120 (W) with no significant deceleration through
both coronagraphs. Note that this speed was inferred fronm the
limited data available at the time of writing

The most probable source of the CME was an X5.6 X-ray flare in
AR 9415, plus other associated activity. GOES records the flare
between 19:10 and 19:31 UT with peak emission at 19:21. The flare
was observed in EIT from 18:48 to 20:24 with peak emission
at 19:24. An EIT wave was observed during the event, as was
dimming. As with an ealier halo CME associated with an X-ray
flare in AR 9415, a large CME was observed by EIT with the
greater part of the ejection apparently originating rather
nearer the limb. This is consistent with the bright front
over the SE limb and fainter emissions elsewhere, but again
the EIT data shows enough activity on the disk to suggest that
the CME may have a significant Earth-directed component.

LASCO and EIT observed a full halo CME on 2001/04/09. The event
was first observed in C2 at 15:54 UT as a bright wide front in
the S and SW. The C2 occulting disk was surrounded by 16:30 although
emission over the N pole was faint. The bright front first appeared
in C3 at 16:18 with the C3 occultor surrounded by 17:18. The plane
of sky speed of the fastest region of the front was measured as
1086 km/s at PA 214 (W) with no significant deceleration through
both coronagraphs. Note that this speed was inferred fronm the
limited data available at the time of writing.

The most probable source of the CME was an M7.9 X-ray flare in
AR 9415. GOES records the flare between 15:20 and 16:00 UT with
peak emission at 15:34. The flare was observed to peak in EIT
at 15:36. An EIT wave was observed during the event, as was
dimming.

Apr 06, 2001 Shift Report
-------------------------
Chandra radiation environment is moderately high, 
from the recent storm, but currently declining:

ACE 2 hr fluence is 1.0e8 vs. threshold 3.6e8. 
CRM-based orbital fluence is 1.1e9 vs. threshold 1.0e9.

Chandra is in the magnetosheath.

A CME occurred on Apr 5, and is expected to arrive
at the Earth on Apr 7 or Apr 8.


Apr 07, 2001 Shift Report
-------------------------
Chandra radiation environment is high and slowly rising:
	ACE 2 hr fluence is 3.3e8 vs. threshold 3.6e8. 
	CRM-based orbital fluence is 1.9e9 vs. threshold 1.0e9.
Chandra is in the magnetosphere.