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Definitions for MT Transfer Functions and Derived Quantities

Inter-station MT impedance: Q

 

The MT surface impedance tensor has four components: Zxx, Zxy, Zyx and Zyy, which satisfy the impedance relations:

\begin{pmatrix} E_x\\ E_y \end{pmatrix}= \begin{bmatrix} Z_{xx} & Z_{xy}\\ Z_{yx} & Z_{yy} \end{bmatrix} \begin{pmatrix} H_x\\ H_y \end{pmatrix}

An inter-station MT impedance is a variant of the MT impedance, where the magnetic field $H_x$ and $H_y$ is obtained at a remote site,

\begin{pmatrix} E_x_1\\ E_y_1 \end{pmatrix}= \begin{bmatrix} Q_{xx} & Q_{xy}\\ Q_{yx} & Q_{yy} \end{bmatrix} \begin{pmatrix} H_x_2\\ H_y_2 \end{pmatrix}

where indices 1 and 2 indicate two different site locations.

See also MT impedance and interstation magnetic field transfer functions.

References

Egbert, G.D., 1997. Robust multiple-station magnetotelluric data processing. Geophysical Journal International, 130(2), pp.475-496.
Chave, A.D. and Jones, A.G. eds., 2012. The magnetotelluric method: Theory and practice. Cambridge University Press.