Maps of the continuum intensity of all sunspots that were analyzed in this study. The white contours indicate a continuum intensity of 50% of the quiet Sun level. The two other contours correspond to different strengths of the vertical magnetic field, evaluated at log τ = −0.9. Blue: 1650 G and red: 1867 G. The letters indicate the evolutionary state of the sunspot (s: stable, f: forming, d: decaying).