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Session 73 - Solar Space Observations, SOHO & SERTS.
Display session, Friday, January 09
Exhibit Hall,

[73.05] The Structure of "halo" Coronal Mass Ejections

A. Vourlidas (George Mason Univ.), R. A. Howard (NRL), K. P. Dere (NRL), S. E. Passwaters (Interferometrics, Inc)

We investigate the relation between the structure of "halo" coronal mass ejections (CMEs) and the global coronal structure. In particular, we compare two "halo" events which occured on October 21, 1997 and were observed with the SoHO/LASCO coronographs at a high cadence. Although the two CME occured at different locations on the solar disk, they both exhibit similar morphology which appear to be influenced by the global coronal structure. By comparing the data from the coronaraphs, EIT and magnetograms, we will attempt to decifer the interplay between the ejected material and the surrounding corona.

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