Ratio of the emerged flux to the underlying azimuthal flux (r_i) versus the azimuthal flux density beneath the emergence location for the active regions recorded during cycle 23. Each green point represents an emergence. The stripes in the background indicate azimuthal flux ranges. The two continuous curves separate ephemeral regions (below the lower curve), medium-sized regions (between the two curves) and large active regions (above the upper curve) by their flux content, according to Table 5.1 of Schrijver & Zwaan (2008). These fluxes have been converted from fluxes as given by Kitt Peak magnetograms to fluxes as given by SOLIS magnetograms by using the cross-calibration constants in Muñoz-Jaramillo et al. (2015).