Fig. 3From: Hydrothermal system of the active crater of Aso volcano (Japan) inferred from a three-dimensional resistivity structure modelComparisons of observed data with the results of the final 3-D resistivity model for three representative frequencies. a Comparison of the phase tensor (left) and induction arrows (right) at 1100 Hz. The left-hand panel shows the elliptical representation of the phase tensor (Caldwell et al. 2004). The right-hand panel shows the real and imaginary induction arrows (Parkinson 1962). b Comparison of the phase tensor (left) and induction arrows (right) at 79 Hz. c Comparison of the phase tensor (left) and induction arrows (right) at 5.6 HzBack to article page