Analysis of Origin of Multi-Ring Basins by Theory of Deep Water Waves

The tsunami model of the origin of multi-ring basins is analysed with the theory of deep water waves generated by an initial surface deformation, which is set as a parabolic crater. We obtain an approximate formula for calculating the ring radius. The formula applied to some multi-ring basins on the Moon, Mercury and Mars gives almost equidistant spacing of the rings
within the main ring (the IV ring); this agrees with the previous conclusion that the IV ring marks the end of the fluidized region. Besides this, the theory of deep water waves does not require similar crustal structure at each basin-impact site on all three planets which is required in the theory of shallow water waves.