Fig. 3: Three-dimensional numerical subduction models testing the influence of the Ryukyu/Izu–Bonin–Marianas SDDS on driving upper plate compression in the northeastern arc-to-back-arc regions of Japan.
From: Non-collisional orogeny in northeast Japan driven by nearby same-dip double subduction
a–f, Set up for single (a) and double (b) subduction experiments, with the viscosity and velocity fields in cross-sections (c,d) and the computed trench-perpendicular (x-direction) normal stress field (σxx) and plate velocity (e,f) for the reference single and double subduction models, respectively. Stress and velocity are extracted within the lithospheric plates at 30 km depth. g, The normal stress difference between the models indicating significantly enhanced compression in the area corresponding to the location of northeast Japan. For simplicity, the Okhotsk plate is not included, and only an equivalent to the Eurasian plate is considered. EUR, Eurasian plate; PSP, Philippine Sea plate; PAC, Pacific plate.
