“…Land-based gravity surveys can be performed with precision and high resolution (1 Â 10 À 8 m/ s 2 to 10 Â 10 À 8 m/s 2 ) using relative and absolute gravimeters (Jousset et al, 1995;Niebauer et al, 1995); however, this is not the case for ocean-based gravity surveys. Airborne and ocean surface gravimetry have low resolution of 1 Â 10 À 5 m/s 2 to 10 Â 10 À 5 m/s 2 because of platform vibrations and apparent gravity effects (Eötvös effect), which depend on velocity and position (Childers et al, 1999;Segawa et al, 2005). Ocean bottom measurements can improve the resolution by approximately 10 À 7 m/s 2 (Zumberge et al, 2008;Fujimoto et al, 2009); however, multiple measurements are required to survey large areas.…”