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Large-Scale Activity in Solar Eruptive Events of October-November 2003 by SOHO/EIT Data View all abstracts by submitter

Ilya Chertok   Submitted: 0000-00-00 00:00

We analyze large-scale disturbances associated with extremely powerful flares and coronal mass ejections (CMEs) occurred during two passages across the solar disk of a grandiose complex of three active regions in October?November 2003 using SOHO/EIT imaging data. In particular, we study dimmings (i.e. transient coronal holes or regions of temporary depressions of the EUV emission) and, in a lesser degree, coronal waves (propagating emitting fronts). Our analysis is based on derotated fixed-difference heliograms, i.e., difference images in which the solar rotation is previously compensated with the same base pre-event frame being subtracted from all heliograms. Such a method allows us to consider both the 12-min interval heliograms at 195 and images observed in different-temperature bands of 171, 195, 284, and 304

Authors: Chertok, I.M. and Grechnev, V.V.

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