The geomagnetic jerk of 1969 and the DGRFs
Physics of the Earth and Planetary Interiors
By: D. Thompson and J.C. Cain
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Abstract
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. ?? 1987.
Suggested Citation
Thompson, D., Cain, J., 1987, The geomagnetic jerk of 1969 and the DGRFs: Physics of the Earth and Planetary Interiors, v. 48, no. 3-4, p. 386-388, https://doi.org/10.1016/0031-9201(87)90163-4.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The geomagnetic jerk of 1969 and the DGRFs |
| Series title | Physics of the Earth and Planetary Interiors |
| DOI | 10.1016/0031-9201(87)90163-4 |
| Volume | 48 |
| Issue | 3-4 |
| Year Published | 1987 |
| Language | English |
| Publisher | Elsevier |
| Publisher location | Amsterdam, Netherlands |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Physics of the Earth and Planetary Interiors |
| First page | 386 |
| Last page | 388 |