Geomorphological variations at hydrothermal sites in the southern Mariana Trough: Relationship between hydrothermal activity and topographic characteristics

► We present bathymetric features of hydrothermal sites in the southern Mariana Trough. ► The features are quite variable between on-axis and off-axis hydrothermal sites. ► Ridge line, mound shape, and bumpy seabed may correlate with hydrothermal activity. ► The on-axis hydrothermal system is influenced by tectonic and volcanic control. ► The off-axis hydrothermal system is strongly controlled by volcanic activity.