Fig. 2From: Hydrothermal system of the active crater of Aso volcano (Japan) inferred from a three-dimensional resistivity structure modelDistribution of the tetrahedral mesh used for 3-D inversion in the survey area. a Surface mesh over an area of 5 km × 5 km centered on the Nakadake first crater. The red dots indicate AMT sites. A resistivity value of 100 Ωm was given for each mesh cell as a starting model. The mesh for the air layer has been omitted to enhance the clarity of the graphic. b East–west cross section passing through the origin (the center of the Nakadake first crater). The mesh cell size is smaller closer to the ground and closer to the central areaBack to article page