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Magnetotelluric and Geomagnetic Depth Sounding Methods Compared
Nature Physical Science, 1972THE electrical conductivity structure of the Earth may be explored by measuring the electric and magnetic field variations induced by magnetic storms. At any point on the surface of the Earth five parameters that vary with time may be observed: the northward (X), eastward (Y) and vertically down (Z) magnetic field components and the northward (A) and ...
F. E. M. LILLEY, H. Y. TAMMEMAGI
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GEOMAGNETIC "DEPTH-SOUNDING" AND THE COAST EFFECT IN WESTERN CANADA
Canadian Journal of Earth Sciences, 1965During 1964 an east–west geomagnetic recording profile was operated in western British Columbia to investigate the "coast effect" in geomagnetic variations. The profile extends earlier work by Hyndman in central and eastern British Columbia. Results of the survey are described and interpreted.
A. Lambert, B. Caner
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Geomagnetic depth-sounding and crustal structure in western Canada
Journal of Geophysical Research, 1971Mapping of the regional electrical conductivity structure in western Canada has been carried out with a network of geomagnetic recording stations that cover the frequency range 10−5 - 2 × 10−3 Hz (24-hour to 8-min periods). Two main regions have been defined, based mainly on the amplitudes of the vertical component (Z) variations in the frequency range
B. Caner +3 more
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Geomagnetic depth sounding over the central Arctic Islands, Canada
Canadian Journal of Earth Sciences, 1980In the spring of 1973, 3 days of simultaneous geomagnetic observations were obtained at six recording sites over the central Arctic Islands. The northern site, Isachsen, displayed the strong suppression of the amplitudes of short-period temporal variations in the vertical component that has been observed at Mould Bay, about 500 km to the southwest ...
Jon M. DeLaurier +3 more
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A new analysis of geomagnetic depth-sounding data from western Canada
Canadian Journal of Earth Sciences, 1970Time varying geomagnetic fields observed in southern British Columbia and Alberta are analyzed using optimum "transfer function" techniques for periods from 4 to 240 min. Estimates of the frequency and spatial dependence of the "coast effect" are obtained.
N. A. Cochrane, R. D. Hyndman
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Analysis of geomagnetic depth sounding data
2010The electromagnetic induction problem is non-linear, and thus is very difficult to solve for all but the simplest symmetries. Because of this, quantitative modelling of the conductivity structure from geomagnetic depth sounding data is expensive and time consuming, and the possibility that the anomaly is produced by channelling of regionally induced ...
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Canadian Journal of Earth Sciences, 1981
Geomagnetic depth-sounding data have been obtained along a profile across the northern Yukon and the Mackenzie Delta region that approximately parallels the east–west flow of the auroral electrojets near the geomagnetic latitude of 70°N. An internal conductive zone, in which electric currents are confined to a north–south direction, is defined by the ...
Jon M. DeLaurier +2 more
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Geomagnetic depth-sounding data have been obtained along a profile across the northern Yukon and the Mackenzie Delta region that approximately parallels the east–west flow of the auroral electrojets near the geomagnetic latitude of 70°N. An internal conductive zone, in which electric currents are confined to a north–south direction, is defined by the ...
Jon M. DeLaurier +2 more
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Canadian Journal of Earth Sciences, 1977
Observations of geomagnetic and telluric field variations have been made at four stations near La Malbaie, Quebec, in a seismically active region northeast of Quebec City. The data were analysed by transfer function and impedance tensor methods to study the nature of geomagnetic induction in the region and its structural implications.
Y. Honkura, R. D. Kurtz, E. R. Niblett
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Observations of geomagnetic and telluric field variations have been made at four stations near La Malbaie, Quebec, in a seismically active region northeast of Quebec City. The data were analysed by transfer function and impedance tensor methods to study the nature of geomagnetic induction in the region and its structural implications.
Y. Honkura, R. D. Kurtz, E. R. Niblett
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