FIGURE 3. Depth sections of vP, vP/vS and QP (which is inversely related to attenuation) along the axis of the TVZ.
From the following article:
The role of fluids in lower-crustal earthquakes near continental rifts
Martin Reyners, Donna Eberhart-Phillips & Graham Stuart
Nature 446, 1075-1078(26 April 2007)
doi:10.1038/nature05743

Earthquakes ('plus' symbols) in both plates within 20 km of the line XY in Fig. 1 are shown, together with the top surface of the subducted Pacific plate (dashed). Small dots are nodes used in the tomographic inversions. Regions of low resolution are masked but contoured (shown white for vP and QP, and green for vP/vS).
