Fig. 10
From: Seismic imaging of slab metamorphism and genesis of intermediate-depth intraslab earthquakes
Seismicity and S-wave velocity in the crust of the Pacific slab. a S-wave velocity distribution in the crust of the Pacific slab under NE Japan on a curved plane 5 km below the upper plate surface. b Hypocenters of earthquakes within the crust of the Pacific slab. Events 0–10 km below the upper plate surface are shown as blue dots, and the upper-plane seismic belt is shown in pink. Broken black curves denote iso-depth contours of the upper plate surface. The slab–slab contact zone is enclosed by two green broken curves. Red triangles are active volcanoes. (After Nakajima et al. 2009b)