Results 171 to 180 of about 3,540 (183)

Joint inversion of magnetotelluric tippers and geomagnetic depth sounding transfer functions constrains electrical conductivity beneath islands

2021
<p>Geomagnetic field variations recorded at island geomagnetic observatories are one of the data sources that can be used to constrain the electrical conductivity beneath oceans. Hitherto, magnetotelluric (MT) tippers (period range from a few minutes to 3 hours) and geomagnetic depth sounding (GDS) transfer functions (TFs; period range ...
Chaojian Chen, Mikhail Kruglyakov, Rafael Rigaud, Alexey Kuvshinov   +3 more
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Geomagnetic depth sounding in southern British Columbia and Alberta

2011
This thesis is an account of the investigation into the physical nature of the proposed discontinuity in upper mantle conductivity in south eastern British Columbia responsible for the change in appearance of geomagnetic variations reported by Hyndman (1963).
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Magnetotelluric Measurements and Geomagnetic Depth Sounding in the Area of the Urach Geothermal Anomaly

1980
The variations of the natural electric and magnetic field have been measured mainly along 2 profiles within the geothermal anomaly, one profile parallel and one perpendicular to the strike of the Swabian Alb. The electromagnetic variations have been registrated in the period range of 6–1000 sec.
A. Berktold, K. Kemmerle, P. Neurieder
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Geomagnetic depth-sounding profile across central British Columbia

2011
Geomagnetic depth-sounding was carried out in a large-spaced profile across central British Columbia in order to map the conductivity structure of the crust and upper mantle in the central Canadian Cordillera. Geomagnetic variographs were set up from east of Jasper to Prince Rupert in two successive east-west profiles during the summer of 1969 ...
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Geomagnetic depth-sounding in the southwest U.S.A. and in southern British Columbia

2011
Three four-station chains of Askania Variographs were operated for periods of two months during 1965 and 1966 in British Columbia, New Mexico, Texas, and Oklahoma to form two magnetic depth-sounding profiles, one in western Canada, and the other in the south western U.S.A. Records were also obtained from some I.G.Y.
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A Transfer Function Analysis of a Geomagnetic Depth Sounding-Profile across Central British Columbia

Canadian Journal of Earth Sciences, 1973
Time variations of the geomagnetic field observed across British Columbia at a mean latitude of 54 °N are analyzed using 'single-station' and 'paired-station' optimum transfer functions. The frequency and spatial dependence of both coastal and inland geomagnetic anomalies are estimated with the following results.
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2011-INCTET Progress Report on Magnetotelluric and Geomagnetic Depth Soundings in the Borborema Province and Adjacent Terrains, NE Brazil

12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011, 2011
In order to enhance our knowledge about the tectonic processes responsible for the geological evolution of the Borborema Province and adjacent regions, the National Institute of Space Research (INPE) and the National Observatory (ON) are conducting Electromagnetic Induction studies in northeastern Brazil, which are being supported by the National ...
Ícaro Vitorello*, Marcelo B. de Pádua, Antonio L. Padilha, Sérgio L. Fontes, Reinhardt A. Fuck, Andrea C. Lima Santos, Mauricio S. Bologna, Walter E. de Medeiros, Marcelo Furlan   +8 more
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Broad-band geomagnetic depth-sounding along an anomalous profile in the Canadian Cordillera

2011
A comprehensive, practical investigation of broad-band geomagnetic depth-sounding for profiles located in anomalous regions has been carried out in three stages. First, instrumentation has been developed to record geomagnetic induction data over a wide range of frequencies (0.01 to 100 mHz). Both geomagnetic depth-sounding (GDS) and magnetotelluric (MT)
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Geomagnetic depth soundings and the upper mantle in the western United States

1970
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Geomagnetic depth sounding and magnetotelluric results from a seismically active region northeast of Quebec City: Reply

Canadian Journal of Earth Sciences, 1977
Y. Honkura, R. D. Kurtz, E. R. Niblett
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