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Centered and eccentric geomagnetic dipoles and their poles, 1600–1985
Author(s) -
FraserSmith A. C.
Publication year - 1987
Publication title -
reviews of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 8.087
H-Index - 156
eISSN - 1944-9208
pISSN - 8755-1209
DOI - 10.1029/rg025i001p00001
Subject(s) - earth's magnetic field , geomagnetic pole , dipole , geophysics , physics , gauss , magnetic dipole , field (mathematics) , geomagnetic secular variation , geology , magnetic field , ionospheric dynamo region , geodesy , mathematics , geomagnetic storm , quantum mechanics , pure mathematics
Using a unified approach, expressions are derived for the various pole positions and other dipole parameters for the centered and eccentric dipole models of the earth's magnetic field. The pole positions and other parameters are then calculated using the 1945–1985 International Geomagnetic Reference Field Gauss coefficients and coefficients from models of the earth's field for earlier epochs. Comparison is made between (1) the recent pole positions and those pertaining since 1600 and (2) the various theoretical pole positions and the observed dip pole positions.