Equatorial components of active regions. (a) Equatorial component at CR2157 vs. time of emergence. (b) Evolution of equatorial components of seven active regions which had strongest equatorial component at CR2157. (c) Projections of the active region equatorial components along the large-scale field at CR2157. (d) Evolution of contributions of seven active regions which had strongest equatorial component at CR2157. Colors mark the seven active regions that had the strongest equatorial component at CR2157 and correspond to same active regions in all panels.