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FIRST <i>SDO</i> AIA OBSERVATIONS OF A GLOBAL CORONAL EUV “WAVE”: MULTIPLE COMPONENTS AND “RIPPLES”
We present the first SDO AIA observations of a global coronal EUV disturbance (so-called "EIT wave") revealed in unprecedented detail. The disturbance observed on 2010 April 8 exhibits two components: one diffuse pulse superimposed on which are multiple sharp fronts that have slow and fast components. The disturbance originates in …