Fig. 6.
From: Two-dimensional resistivity structure of Unzen Volcano revealed by AMT and MT surveys
(a) Resistivity structure after removing no sensitivity part. A heavy line represents the borehole USDP-4 by conduit drilling. (b) Interpretation of the resistivity structure. The high resistivity surface (greater than 1000 Ω m) is shown by the shaded portion. The low resistivity region (less than 20 Ω m) and the extremely low resistivity region (less than 3 Ω m) are shown by the slightly gray and the darker portions, respectively.