The geomagnetic jerk of 1969 and the DGRFs

Details The geomagnetic jerk of 1969 and the DGRFs The geomagnetic jerk of 1969 and the DGRFs

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...48..386t&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 48, Issue 3-4, p. 386-388.

Physics

3

Scientific paper

Cubic spline fits to the DGRF/IGRF series indicate agreement with other analyses showing the 1969-1970 magnetic jerk in the h˙12 and g˙02 secular change coefficients, and agreement that the h˙11 term showed no sharp change. The variation of the g˙01 term is out of phase with other analyses indicating a likely error in its representation in the 1965-1975 interval. We recommend that future derivations of the `definitive' geomagnetic reference models take into consideration the times of impulses or jerks so as to not be bound to a standard 5 year interval, and otherwise to make more considered analyses before adopting sets of coefficients.
Present address: Department of Geology, Florida State University, Tallahassee, FL 32306-3026, U.S.A.

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