Fig. 4From: Three-dimensional topographic relief of the oceanic crust may control the occurrence of shallow very-low-frequency earthquakes in the Nankai Trough off KumanoInterpreted horizons of (a) the décollement and (b) the top of the oceanic crust. The black lines with triangles denote faults (and trench in (a)). The décollement is generally a gently sloping surface and has a locally steep slope in the SW area. The top of the oceanic crust has prominent topographic relief due to faults in the oceanic crust, and there are ridges on the surfaceBack to article page