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Fig. 3.


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Histograms of horizontal speeds (top) and durations (lifetimes) of the features (bottom). Black lines represent PGs in the inner half of the penumbra (solid line) and structures in dark bodies of filaments (dash-dot), green lines represent PGs in the outer half of the penumbra, red lines represent the motions of the outer penumbral border, both expansion and stationary (solid) and contraction (dotted), and purple lines represent GBPs.

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