Figure 5

Sketch summarizing the features observed in the two subduction zones. The shallow and deep seismicity bands are drawn as gray stripes and are separated by the area of diffuse seismicity. The stress distribution with depth is schematically drawn along two cross sections for each subduction zone, with blue shading for tensional and red shading for compressional stress, darker colors meaning larger absolute values. The distance of the cross section in km along the profiles, according to Figs. 2, 3, S3, S4, is marked in red. The black wedge-shaped line at about 410 km depth represents the Metastable Olivine Wedge (MOW). The pink oval shape in Izu–Bonin roughly indicates the area of stress decrease due to the presence of a slab tear.