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Electromagnetic manifestation of the lithosphere in the ULF-VLF range

Electromagnetic manifestation of the lithosphere in the ULF-VLF range

Brief analysis of the current state of research in natural electromagnetic field at the Earth’s surface in the SLF-VLF range has been conducted. A set of estimations of field levels ratios of lithospheric and storm origin has been made. It has been shown that the level of electromagnetic field of li...

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Bibliographic Details
Main Author: Uvarov, V. N.
Format: Article
Language:rus
Published: Subbotin Institute of Geophysics of the NAS of Ukraine 2012
Online Access:https://journals.uran.ua/geofizicheskiy/article/view/116720
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Summary:Brief analysis of the current state of research in natural electromagnetic field at the Earth’s surface in the SLF-VLF range has been conducted. A set of estimations of field levels ratios of lithospheric and storm origin has been made. It has been shown that the level of electromagnetic field of litho-spheric origin is several orders of magnitude smaller than that one of storm origin. Justification for the use of a quadruple antenna is made, which distinguishes signals of closely spaced sources. These sources are most likely of lithospheric origin in case of high microseismicity and absence of other sources. Some results of such measurements are given. A brief review and analysis of exi-sting passive methods of electromagnetic geophysical exploration has been conducted. It has been shown that the methods based on the averaged binarization, mainly contain the fluctuating part of natural electromagnetic field.

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