Sequence of continuum images for emergence event ℓ10. Each image is overlaid with the corresponding contours of longitudinal magnetic field (15 G in yellow; 45 G in red, and blue outlines  − 45 G). Corresponding times are labelled for each frame in the top bar. The FOV is cropped to a size of . The black circumference presents a diameter of 83 (6 Mm). A white arrow in the third frame points to the buoyancy braking darkening (see text for details). The corresponding movie for the ℓ10 emergence is provided as electronic material.