The spatial-temporal distribution of 60-year geomagnetic variations

Details The spatial-temporal distribution of 60-year geomagnetic variations The spatial-temporal distribution of 60-year geomagnetic variations

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ge%26ae..22..638b&link_type=abstract

Geomagnetizm i Aeronomiia, vol. 22, July-Aug. 1982, p. 638-642. In Russian.

Mathematics

Logic

1

Geomagnetism, Magnetic Variations, Spatial Distribution, Temporal Distribution, Harmonic Analysis, Mathematical Models, Nonuniformity, Spherical Harmonics, Temperate Regions, Tropical Regions

Scientific paper

A morphological description of 60-year geomagnetic variations is given for 1905-1965 on the basis of analytical models of the main geomagnetic field, obtained by spherical harmonic analysis; the study relies on the aggregate data from worldwide magnetic surveys. It is shown that these variations are nonuniformly distributed at the earth's surface, with the presence of large-scale extremal regions. The temporal evolution of these variations is of growth-decay type. At low and middle latitudes, these variations can be associated with various types of sources.

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