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Fig. 3

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Magnetic field strength distribution of MBP features gained by data set I (sunspot). The peak around 1300 G related to collapsed magnetic fields was fitted by a log-normal component yielding a geometric mean μ = (1250  ·| ÷ 1.18) G. The reduced χ2 for the fit is 3.9. In total, 2392 MBP features were identified and used in the analysis which covered about 2% of the FOV.

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