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Difficulties in the application of magnetic field gradient analysis to induction studies

Beamish, D.; Johnson, P.M.. 1982 Difficulties in the application of magnetic field gradient analysis to induction studies. Physics of the Earth and Planetary Interiors, 28 (1). 1-13. 10.1016/0031-9201(82)90115-7

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Abstract/Summary

Geomagnetic variation data recorded across an array of magnetometer stations in northern England have been used to compute an inductive response function. The function, if successfully determined, is appropriate for sounding vertical conductivity structures on a regional scale. The method employed is the horizontal spatial gradient method using station averaging and a linear approximation. It is found that, for the data under consideration,, local and lateral anomalous fields exist in all three components at periods ranging from 10 to 10**4 s. The presence of such anomalous fields invalidates the procedures used to estimate the regional field, whose characteristics are required to determine successfully the inductive response function.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/0031-9201(82)90115-7
Programmes: BGS Programmes > Other
ISSN: 0031-9201
NORA Subject Terms: Earth Sciences
Date made live: 10 May 2016 14:30 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/513582

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