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Global geomagnetic field mapping - from secular variation to geomagnetic excursions

, 2015
Panovska, S., Constable, C.
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Pacific Geomagnetic Secular Variation

Science, 1971
We have considered several different types of records of long-period geomagnetic secular variation: direct measurements made in geomagnetic observatories; paleomagnetic measurements on Hawaiian lava flows with accurately known ages in the interval 0 to 200 years; paleomagentic measurements on Hawaiian lava flows with loosely determined ages within the ...
Richard R. Doell, Allan Cox
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Geomagnetic secular variation impulses

Nature, 1984
The secular variation of the Earth's internal magnetic field changes on time scales of the order of a year. Such impulses occurred in 1969 and probably in 1913; they provide constraints on deep mantle conductivity, which appears to be rather low, and on the motions of the top of the fluid core, which are probably dominated by westward drift.
V. Courtillot, J. L. Le Mouël
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Geomagnetic secular variation Model E

Journal of Geophysical Research, 1974
We propose a new geomagnetic secular variation model (model E) in which the correlation coefficient between the main dipole and the nondipole components can lie between 0 and +1. This model then describes the total secular variation as a region bounded by lower and upper limits that can be reduced to a single curve only when more adequate data become ...
Czang-Go Baag, C. E. Helsley
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Pacific geomagnetic secular variation.

Science (New York, N.Y.), 2010
We have considered several different types of records of long-period geomagnetic secular variation: direct measurements made in geomagnetic observatories; paleomagnetic measurements on Hawaiian lava flows with accurately known ages in the interval 0 to 200 years; paleomagentic measurements on Hawaiian lava flows with loosely determined ages within the ...
R R, Doell, A, Cox
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Geomagnetic Secular Variation

1989
The spatial and temporal variation of the geomagnetic field component annual means has been analyzed. The data used in this study consist of the annual means of the vector magnetic field components measured at nearly one hundred magnetic observatories widely distributed about the Earth.
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Geomagnetic secular variations and surveys

Proceedings of the Physical Society, 1946
The secular variations of the Earth's field call for frequent determinations of the geomagnetic elements at many selected stations on land and at sea. So far, general world magnetic surveys have of necessity been restricted to the surface of the Earth.
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Geomagnetic Secular Variation in Scandinavia

Nature Physical Science, 1972
IT has been pointed out by E. B. Fabiano of the United States National Oceanic and Atmospheric Administration (private communication) that the values for the secular variation in the declination ( Open image in new window ), quoted in my recent communication1 as having been computed from the International Geomagnetic Reference Field (IGRF), are in ...
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Short-period geomagnetic secular variation

Geophysical & Astrophysical Fluid Dynamics, 1984
Abstract In this paper the main problems of the theory of the short-period geomagnetic secular variation are described. An approximate analytical representation of the observational data on both the geomagnetic field variations and the associated variations in the length of the day, the kinematics of the generation of geomagnetic variations in the skin-
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Secular trends in daily geomagnetic variations

Journal of Atmospheric and Terrestrial Physics, 1980
Abstract After removal of seasonal and sunspot cycle effects, the solar ( S ) and lunar ( L ) daily geomagnetic variations at Hermanus, Huancayo and San Juan are found to have significant secular changes. The solar variations are shown to be more closely fixed to local magnetic coordinates than to geographic coordinates.
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