Left: sequence of SOT/BFI G-band images of region B. Right: sequence of co-spatial and co-temporal SOT/BFI Ca II H images. The contour lines enclose kG magnetic fields at log (τ) = −0.8 obtained from inversions of SOT/SP scans. The purple contour lines correspond to negative polarity and the turquoise to positive polarity fields. The colour bars apply to all their respective images and the xy axes indicate the size of each image.