Physics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ge%26ae..17..907b&link_type=abstract
Geomagnetizm i Aeronomiia, vol. 17, Sept.-Oct. 1977, p. 907-915. In Russian.
Physics
2
Earth Core, Earth Mantle, Electrical Resistivity, Geomagnetism, Magnetic Variations, Frequency Response, Green'S Functions, Integral Equations, Screen Effect
Scientific paper
Masking by earth's mantle of magnetic-field variations originating in the core is investigated. The frequency and pulse characteristics of the mantle as a linear LF filter are determined by assuming a relatively thin conducting layer. Green's function is obtained and used to derive a solution for an arbitrary spatial-temporal relation between the core and the magnetic field. A simple technique for approximating the core magnetic field from variations observed at earth's surface is outlined which takes into account the masking effect of the mantle and does not require a spectral expansion of the magnetic-field in powers of frequency.
Braginskii S. I.
Fishman V. M.
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