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Earth, Planets and Space
Fig. 7. | Earth, Planets and Space

Fig. 7.

From: Derivation of characteristics of the relation between geomagnetic and geoelectric variation fields from the surface impedance for a two-layer earth

Fig. 7.

Real and imaginary parts of the exact surface impedance given by Eq. (4) for a two-layer earth, and (the real part of) the approximate surface impedance given by Eq. (21). The thickness of the upper layer is 14 km. The conductivities of the upper layer and of the bottom are 2 · 10-2 Ω-1 m-1 and 6 · 10-4 Ω-1 m-1, respectively. These numerical values are adopted based on Watari et al. (2009). The quantities are plotted as functions of the frequency (=ω/2π).

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