Extended Data Fig. 3: Seismic reflectivity and AML|LAB morphology beneath the caldera.
From: Melt focusing along lithosphere–asthenosphere boundary below Axial volcano
a, A complex, 3D cut-out view of the seismic reflectivity volume highlighting the structure of the AML|LAB across the four main magma bodies (not including the magma bodies located near the CoAxial segment). The AML|LAB and underlying sills are labelled. b, Similar perspective for which semi-transparent AML|LAB surfaces of funnels A, B, C and D have been added and are shaded by two-way travel time, with cool colours representing shallower parts of the structure and warm colours show the deepest areas; vertical colour bar (two-way travel time) is shown on the left. Edges of the caldera are noted by arrows. Locations of hydrothermal fields are shown as magenta-filled circles20. Outlines of the 2011 (cyan) and 2015 (green) lava flows are overlaid on the 3D bathymetric map60,61. Seismic data below the primary seafloor multiple have been greyed out. Dashed white lines outline the complex rectangular chair-cuts.
