Halo CME Mail

Date: Sat, 25 Nov 2000 23:37:48 +0000 (GMT)

From: Simon Plunkett

Subject: More halos on 2000/11/24 and 2000/11/25

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

LASCO observed several more halo CMEs yesterday (2000/11/24) and today
(2000/11/25). These events are briefly summarized below. I have not had
time to measure speeds or to verify surface associations, but the timings
seem to correspond to the large M and X flares of the last two days. Note
that there is a temporary data gap in the LASCO data from about 22:30 on
11/24 to 04:00 on 11/25, due to a gap in DSN contact with SOHO. Thus it is
not clear if the first event listed is really a halo, although images
taken after the gap suggest that this is the case. Also, the first large M
flare on 11/25 occurred during this gap in contact. These data should be
available in the next few days.

Date/Time                       Comment
2000/11/24 22:06                Large bright loop in NW. Maybe a halo, but
                                occurred right before a data gap.
2000/11/25 09:30                Full halo, brightest in W, faint in E.
2000/11/25 19:31                Full halo, brightest in W.

More on these events, and the event from 11/24 at 15:30 UT, tomorrow or
Monday.

Best wishes,

Simon Plunkett.

++
| Simon Plunkett,              E-mail: plunkett@kreutz.nascom.nasa.gov |
| USRA, 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       |
++