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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: The 2018 phreatic eruption at Mt. Motoshirane of Kusatsu–Shirane volcano, Japan: eruption and intrusion of hydrothermal fluid observed by a borehole tiltmeter network

Fig. 6

Spatial distribution of misfit values in horizontal and vertical cross-sections at intervals of 100 m. For each panel, we fixed Z (horizontal cross-section), X (N–S cross-section), and Y (E–W cross-section) to optimum values of 1100 m asl, 36.629° (latitude), and 135.540° (longitude), respectively. Using the same method as in Section “Modeling”, we searched for the best-fit parameters L, A, D, U, and location (X and Y for horizontal cross-section, Y and Z for N–S cross-section, and X and Z for (E–W cross-section) within the range described in Section “Modeling”. Yellow lines are topographic contours at intervals of 20 m. Yellow squares indicate the locations of craters formed during the 2018 eruption. White and red circles represent hypocenters determined by the KSVO for the periods from 1 January 2016 to 22 January 2018 (before the eruption) and from 23 January to 22 April 2018 (after the eruption), respectively

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