Sequence of inverted SOT/SP scans and Hα images of region C. The purple contour lines correspond to negative polarity and the turquoise to positive polarity kG fields at log (τ) = −0.8. The arrows indicate the direction of the azimuthal magnetic field component at log (τ) = −2. The colour bars apply to all plots of their type and the xy axes indicate the size of each plot. The log (τ) layer of each plot is also indicated on the right of each row.