Azimuthal modes of the geomagnetic field

Details Azimuthal modes of the geomagnetic field Azimuthal modes of the geomagnetic field

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ge%26ae..30.1022r&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 30, Nov.-Dec. 1990, p. 1022-1026. In Russian.

Computer Science

Azimuth, Geomagnetism, White Noise, Energy Spectra, Gauss Equation, Magnetic Fields, Spectral Energy Distribution, Spherical Harmonics

Scientific paper

The concept of the energy spectrum of azimuthal modes (or m-modes) is introduced. The latitudinal amplitude distribution of the m-modes on the earth's surface is determined along with their asymmetry with respect to the equator; the mode with m greater than 2 is susbtantially weaker in amplitude than the principal modes, m = 0, 1, 2. A comparison of radial spectral distributions of the n and m modes indicates that determinations of the depth of a geomagnetic-field source using the 'white noise' concept are inadequate.

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