Fig. 1From: Permeability-control on volcanic hydrothermal system: case study for Mt. Tokachidake, Japan, based on numerical simulation and field observationMaps showing the location of Mt. Tokachidake (inset) and local topography. Line (A–B) defines the 2-D model cross section. White boxes represent the main hot springs around the volcano. Contour interval is 100 mBack to article page