From plunkett@kreutz.nascom.nasa.gov Sat May  1 10:55:52 1999
Date: Fri, 30 Apr 1999 16:54:41 +0000 (GMT)
From: Simon Plunkett <plunkett@kreutz.nascom.nasa.gov>
Subject: Re: Sigmoid, Flare, CME?

>LASCO and EIT observed a partial halo CME on 1999/04/29, following an M1
>flare in AR 8524 at N22 W15. The event was first visible as a diffuse
>front over the N pole in C2 at 19:54 UT. Fainter emission was also
>detectable along the E limb, and over the S pole. In all, the event
>spanned about 240 degrees in position angle, from PA 320 in the NW to PA
>180 over the S pole. The speed of the event in the plane of the sky was
>about 300 km/s at PA 0 (N pole).
> 
>Images and movies of the event are available at the LASCO ftp server:
> 
>ftp://lasco-www.nrl.navy.mil/pub/lasco/halo/19990429
> 
>Note that there is an earlier event visible in the first frame of the C2
>movie, which is apparently unrelated to the partial halo.