Fig. 4.

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Comparative overview of the evolution of the magnetic flux components and the color curves for active region NOAA 11072. (a) Total unsigned Bz (green), Bx (red), and By (blue), (b) total number of pixels with red, green, blue, and white color (red, green, blue, and black, respectively), and (c) total number of pixels with cyan, magenta, and yellow color. The vertical dashed lines indicate the times of B-class flares.
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