Fig. 4From: Dynamic formation process of thick deformation zone on the shallow plate boundary fault of the Japan Trench: insight from analog experiments of half-graben subductionDeformation timeline with convergence of half-graben basement without trench-fill (EXP 2). The shortening (D) increases from the top to the bottom. The incremental shear strain becomes larger in the order from blue to red in the color reference. Incremental shear strain indicates relative, not absolute, quantityBack to article page