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Prominence latitudes were used to track the positions of solar magnetic field boundaries over eight consecutive years. Equatorial zone boundaries moved towards the solar equator, accompanying sunspot active regions, until solar activity began to decline. Polar zone boundary migration towards the solar poles coincided with N/S magnetic field reversal, with polar ‘crowns’ forming in 2013/2014. Day-to-day prominence positions delineated field boundary orientation, which changed appreciably as the solar cycle progressed.