Two‐dimensional viscosity structure of the northeastern Japan islands arc‐trench system

• DOI: 10.1002/grl.50906
• Publication Date: 2013-08-29T04:39:33Z
• Authors: Jun Muto; Bunichiro Shibazaki; Yoshihiro Ito; Takeshi Iinuma; Mako Ohzono; Takumi Matsumoto; Tomomi Okada
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Two‐dimensional viscosity profiles were constructed for the northeastern Japan islands arc‐trench system covering source area of 2011 Tohoku‐Oki earthquake. From seismologically determined models lithospheric structure, experimentally derived constitutive laws various rocks, and densely measured geothermal gradient data, we have predicted steady state effective across subduction zone. The profile reveals strong lateral gradients both parallel normal to trench axis. detailed structures presented here contribute accurate evaluation viscoelastic relaxation components when modeling geodetically postseismic deformation at high spatial temporal resolution.