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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Magma reservoir beneath Azumayama Volcano, NE Japan, as inferred from a three-dimensional electrical resistivity model explored by means of magnetotelluric method

Fig. 8Fig. 8

Observed (left column), calculated (center column), and residual (right column) phase tensor ellipses of all sites at various periods or frequencies. The observed and calculated phase tensor ellipse magnitudes are normalized with each observed maximum principal axis magnitude at each site and period/frequency, and are filled with colors corresponding to tan−1(\({\varPhi }\)2) designated by the color scale. The phase tensor residual uses the definition by Peacock et al. (2012), and these are filled with colors corresponding to Δ\({\varPhi }\)principal (Eq. 18) designated by the color scale. Azimuth of the white bars represents αobs + βobs + π/2 direction (length is arbitrary)

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