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The large-scale disruption of the corona involves global waves and wave-like things. This paper pointed out the magnetic restructuring involved in a CME as a wave-like thing. Something launches waves either of the CME-driven variety, or of the Uchida-type blast wave responsible for metric type II bursts, and this something must be identifiable with the basic unstable development of the flare/CME process. Historically, this viewpoint helped a lot in showing the richness of the EUV imaging of large-scale disruptions.
March 7, 2007