Mohr Circles in Magnetotelluric Interpretation (i) Simple Static Shift; (ii) Bahr's Analysis.

Magnetotelluric analysis using Mohr circles

The Mohr circle, most commonly met in the analysis of mechanical stress, is used to depict magnetotelluric impedance information, taking the real and quadrature parts of magnetotelluric tensors separately. The magnetotelluric concepts of two-dimensionality, three-dimensionality, skew and anisotropy are then all given quantitative expression on a diagram, as are various magnetotelluric invariant...

Magnetotelluric Tensor Decomposition: Insights from Linear Algebra and Mohr Diagrams

Three-dimensional joint inversion for magnetotelluric resistivity and static shift distributions in complex media

[1] Accurate interpretation of magnetotelluric (MT) data in the presence of static shift arising from near-surface inhomogeneities is an unresolved problem in threedimensional (3-D) inversion. While it is well known in 1-D and 2-D studies that static shift can lead to erroneous interpretation, how static shift can influence the result of 3-D inversion is not fully understood and is relevant to ...

using the determinant data as a replacement for the static shift correction in magnetotelluric surveys

magnetotelluric (mt) method is an electromagnetic method which provides information about subsurface conductivity structures using earth's natural electromagnetic fields. static shift is one of disorders arising from shallow conductors; therefore static shift must be corrected as one of mt data processing steps. in the absence of sufficient information about the near surface distortions, w...

Static Program Analysis Foundations of Abstract Interpretation

Semantics Similar to concrete semantics:  A complete lattice (L#, ≤) as the domain for abstract elements  A monotone function F# corresponding to the concrete function F  Then the abstract semantics is the least fixed point of F#, lfp F# If F# “correctly approximates” F, then lfp F# “correctly approximates” lfp F. Fixpoint Transfer Theorem Local Correctness Global Correctness An Example Abst...