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 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.