From schenk@kreutz.nascom.nasa.gov Sat Nov 24 16:05:34 2001 Date: Sat, 24 Nov 2001 02:50:08 +0000 (GMT) From: Kevin Schenk To: Undisclosed recipients: ; Subject: Full Halo CME at 23:30 UT on 2001/11/22 UCMEO 93001 11123 2330/ 11122 72030 80342 3001/ 299// 333// 41500 11122 62212 80012 35524 09704 4212/ 99999 BT EIT and LASCO observed 2 full halo CMEs on Friday November 22, 2001. This message pertains to the second event in the series. This event was first seen in C2 starting at 23:30 UT as a symetrical halo event with core. Again due to the high velocity of the event only 1 frame in C2 was used. The event was measured through the C3 field of view to 30 Rs to a plan-of-sky speed of 1500 km/sec at PA 300 degrees. This event produced protons which are seen in the Lasco white light images. EIT observes a CME event starting at 22:12 UT with southward dimming. The CME takes off and is followed by a bright flare already in progress at 23:12 UT. This event comes from AR 9698 located in the SW quadrent at location [S17; W24]. This flare is probably associated with the M9.9 flare seen in GOES at 22:32 UT. By 00:12 UT an impressive counter spiraling arcade is seen. This event is probably associated with the event observed in LASCO. Images and movies of the combination of the 2 halo CMEs on this date are found on the lasco server at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20011122/ Best reguards Kevin Schenk EIT and LASCO Operations NASA-Goddard Space Flight Center, USA