Sequence of inverted SOT/SP scans of region B. The black contour lines enclose kG magnetic fields at log (τ) = −0.8 and 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. The white box encloses rising magnetic fields.