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Fig. 2.

image

Horizontal magnetic field as derived from the SIR inversions. From left to right panel: the background represents the apparent longitudinal magnetic flux density with a cutoff at Mx cm−2 for a few of the time steps shown in Fig. 1, as well as additional frames. The lines indicate the magnetic field direction of the horizontal magnetic field obtained from the SIR inversions. Due to the 180° ambiguity we do not show the arrow heads as they could be pointing in either of the two indicated directions. The colour of the lines indicate the strength of the total horizontal magnetic field.

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