Secular-invariant relationships among internal geomagnetic field coefficients

Details Secular-invariant relationships among internal geomagnetic field coefficients Secular-invariant relationships among internal geomagnetic field coefficients

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974georl...1..367r&link_type=abstract

Geophysical Research Letters, vol. 1, Dec. 1974, p. 367-370. NSF-NASA-supported research.

Physics

3

Geomagnetism, Magnetic Fields, Magnetic Variations, Secular Variations, Lines Of Force, Long Term Effects, Quadrupoles, Spatial Distribution

Scientific paper

Some features of the secular variation of the geomagnetic field are examined. Contours encircling constant magnetic flux (third adiabatic invariant), corresponding to a shell of field lines in secular motion, reveal a general westward drift that is longitude and latitude dependent (with minima in the north Pacific and south Atlantic areas). Some invariant relationships appear among the field coefficients in the tilted, centered dipole (geomagnetic) coordinate system.

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