[1] Subduction zones are where sediments, oceanic crust, and mantle lithosphere return to and reequilibrate with Earth’s mantle. Subduction zones are interior expressions of Earth’s 55,000 km of convergent plate margins and are the geodynamic system that builds island arcs. Excess density of the mantle lithosphere in subduction zones provides most of the power needed to move the plates while in...

Abstract Two‐decades of onshore‐offshore, ocean‐bottom seismometer, and passive‐source data are integrated to obtain high‐resolution 3‐D constraints on the architecture Nankai subduction zone. Our model reveals large along‐strike variability in width outer‐forearc, with crustal backstop ( V P ≥ 5 km/s) extending within 50 km Trough offshore Tokai Kii Peninsula, but is a factor 2 further landwar...

Abstract The geometries (i.e., dip angles) of active faults from the surface to seismogenic zone are most important factors used evaluate earthquake ground motion, which is crucial for seismic hazard assessments in urban areas. In Osaka, a metropolitan city Japan, there several (e.g., Uemachi and Ikoma faults), inferred topography, attitude trenches, reflection profile at shallow depths (less t...

Abstract Subduction interfaces are loci of interdependent seismic slip behavior, fluid flow, and mineral redistribution. Mineral redistribution leads to coupling between flow behavior through decreases in porosity/permeability increases cohesion during the interseismic period. We investigate this system from perspective ancient accretionary complexes with regional zones mélange that record nonc...

Over the past decades, global geodynamic models have been used to investigate thermal evolution of terrestrial planets. With increase computational power and improvement numerical techniques, these become more complex, simulations are now able use a high resolution 3D spherical shell geometry account for strongly varying viscosity, as appropriate mantle materials. In this study we review that i...