On the resolving power of the VLF method |
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Authors: | Václav Bezvoda Karel Segeth |
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Institution: | (1) Faculty of Sciences, Charles University, Albertov 6, 128 43 Praha 2, Czechoslovakia;(2) Mathematical Institute, Czechoslovak Academy of Sciences, Zitná 25, 115 67 Praha 1, Czechoslovakia |
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Abstract: | In the paper, the mathematical tools, used for the modelling of the electromagnetic field of the harmonic plane wave in the two-dimensional inhomogeneous medium (the case ofE-polarization), are presented. Further, the resolving power of some parameters, that are measured in the VLF and VLF-R methods, is compared in the case of two vertical conductive dykes. To this aim, all the usual parameters of the VLF method and the most important parameter of the VLF-R method () have been chosen. Two groups of models that differ in resistivities have been considered. In each of the groups the distance of the dykes is variable. The parameters |H
y|, which has shown most promising in this respect, is examined also from the point of view of the sensibility to geological noise. The results of the modelling are illustrated by two examples of the results of field measurements. |
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Keywords: | Numerical modelling VLF and VLF-R methods Harmonic electromagnetic field |
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