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Fig. 18
Blowups of the area within the white boxes in Fig. 17. Contours in panels a); c); and d) encircles negative (ΔB/ Δlog τ)0.0,−0.9 and white contours in panel b) indicate areas with polarity opposite to that in the umbra. The three vertical bars in panel a) mark the locations of the vertical cuts displayed in Fig. 20.
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