Results for skewness from SOLIS/VSM synoptic maps. Top: skewness calculated for each latitude bin and rotation using all field values, called here the full-field skewness butterfly diagram (positive skewness in red, negative in blue). Middle: same as in top panel, but using only weak-field values to calculate skewness, called here the weak-field skewness butterfly diagram. Bottom: longitudinal means of the photospheric field for each latitude bin and rotation, known as the normal magnetic butterfly diagram.