Computer Science – Sound
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ge%26ae..27..459s&link_type=abstract
Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 27, May-June 1987, p. 459-464. In Russian.
Computer Science
Sound
Diurnal Variations, Earth Mantle, Geomagnetism, Magnetic Variations, Amplitudes, Europe, Phase Deviation, Ring Currents, Spectrum Analysis, Strata
Scientific paper
Mean diurnal magnetic-field values from a series of European observatories are analyzed, and it is shown that the conventional ring-current model for periods ranging from 4 to 100 days does not contradict the data of these observatories. A method is proposed for taking into account noise in the horizontal field components when carrying out magnetic-variation sounding of the earth's upper mantle. Sounding results are in good agreement with a global-sounding curve in terms of the apparent specific resistance, and yield an original phase curve for these periods. This phase-curve behavior indicates the presence of a well-conducting layer at a depth of 500 km on the background of a monotonic increase of terrestrial conductivity with depth.
Semenov Iu. V.
Zakharova O. K.
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