Results 41 to 50 of about 13,255 (163)
Earth, Planets and Space, 2020 Earth’s internal magnetic field is generated through motion of the electrically conductive iron-alloy fluid comprising its outer core. Temporal variability of this magnetic field, termed secular variation (SV), results from two processes: one is the ...
Maurits C. Metman +3 more
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Geochemistry, Geophysics, Geosystems, 2008 The Steens Basalt, now considered part of the Columbia River Basalt Group (CRBG), contains the earliest eruptions of this magmatic episode. Lava flows of the Steens Basalt cover about 50,000 km2 of the Oregon Plateau in sections up to 1000 m thick.
Nicholas A. Jarboe +4 more
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Secular variations of the geomagnetic field on litosphere plates of the Earth
Геофизический журнал, 2018 The dependence of the value and sign of the geomagnetic secular variations (SV) refined of 3- and 11-year components on the position of observatories at different tectonic plates is investigated.
P. V. Sumaruk, T. P. Sumaruk
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Geomagnetic Core Field Secular Variation Models
Space Science Reviews, 2009 We analyse models describing time changes of the Earth’s core magnetic field (secular variation) covering the historical period (several centuries) and the more recent satellite era (previous decade), and we illustrate how both the information contained in the data and the a priori information (regularisation) affect the result of the ill-posed ...
Gillet, N., Lesur, V., Olsen, N.
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A new high-resolution geomagnetic field model for southern Africa
South African Journal of ScienceEarth’s magnetic field is a dynamic, changing phenomenon. The geomagnetic field consists of contributions from several sources, of which the main field originating in Earth’s core makes up the bulk.
Amore E. Nel +3 more
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Annals of Geophysics, 2013 A recent stage of the magnetic surveying activities in the Czech Republic was started in the fifties by setting up a basic network of the first order. It consists of 199 points.
Pavel Hejda +2 more
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Elements of a Theory of Religious-Secular Competition
Política & Sociedade, 2017 This article presents basic elements of a theory of religious-secular competition on the individual level. The theory claims that individuals in many societies may choose between religious and secular options, creating a situation of competition between
Jörg Stolz, Pascal Tanner
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Geomagnetic secular variation since 1901 [PDF]
Deep Sea Research Part B. Oceanographic Literature Review, 1981 Summary. All available annual means, from the world-wide network of magnetic observatories, of north intensity (X), east intensity (Y) and vertical intensity (Z) from 1901 to 1977 are subjected to spherical harmonic analysis to obtain 38 models of the Earth's geomagnetic field at two-year intervals.
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The influence of regularization on the geomagnetic core field modeling
地球与行星物理论评Earth's magnetic field is generated through the dynamo action in the liquid outer core. Using observational data from geomagnetic satellites and observatories, we can construct geomagnetic models that describe spatial and temporal variations of the core ...
Juyuan Xu, Yufeng Lin, Keke Zhang
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Secular variation of the geocenter [PDF]
Journal of Geophysical Research: Solid Earth, 2000 The degree 1 deformations of Earth induced by a surface load are computed, in a reference frame related to the center of mass of the planet, using a theoretical approach (Love number formalism), at secular timescale, where Earth has a viscoelastic behavior.
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