Fig. 6.


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Mean (top panel) and total (bottom panel) of the daily on-disk pixel intensities of the 171 Å (red) and 195 Å (blue) EIT images. Early in 2011 (indicated with the vertical dashed line), the time series shows a significant increase in mean and total intensity for both channels. Therefore, EIT data taken after 31 December 2010 have been excluded from the reconstruction.

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