Spatiospectral concentration of vector fields on a sphere [PDF]
, 2013 We construct spherical vector bases that are bandlimited and spatially concentrated, or, alternatively, spacelimited and spectrally concentrated, suitable for the analysis and representation of real-valued vector fields on the surface of the unit sphere,
Plattner, Alain, Simons, Frederik J.
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Non-singular spherical harmonic expressions of geomagnetic vector and gradient tensor fields in the local north-oriented reference frame [PDF]
Geoscientific Model Development, 2015 General expressions of magnetic vector (MV) and magnetic gradient tensor (MGT) in terms of the first- and second-order derivatives of spherical harmonics at different degrees/orders are relatively complicated and singular at the poles. In this paper, we
J. Du, C. Chen, V. Lesur, L. Wang
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Global lithospheric magnetic field modelling by successive regional analysis [PDF]
Earth, Planets and Space, 2006 AbstractPresent lithospheric field models, like the MF4 and CM4, are produced by least squares estimation using spherical harmonic basis functions with global support. Accounting for the different properties of magnetic data at low and high latitudes, a method that can take regional differences into account is proposed.
openaire +3 more sources
A spherical harmonic model of the lithospheric magnetic field of Mars [PDF]
Journal of Geophysical Research: Planets, 2014 AbstractWe present a model of the lithospheric magnetic field of Mars which is based on Mars Global Surveyor orbiting satellite data and represented by an expansion of spherical harmonic (SH) functions up to degree and order 110. Several techniques were applied in order to obtain a reliable and well‐resolved model of the Martian lithospheric magnetic ...
A. Morschhauser, V. Lesur, M. Grott
semanticscholar +7 more sources
A statistical spatial power spectrum of the Earth's lithospheric magnetic field [PDF]
Geophysical Journal International, 2015 The magnetic field of the Earth's lithosphere arises from rock magnetization contrasts that were shaped over geological times. The field can be described mathematically in spherical harmonics or with distributions of magnetization. We exploit this dual representation and assume that the lithospheric field is induced by spatially varying susceptibility ...
E. Thébault, F. Vervelidou
semanticscholar +5 more sources
Geopotential field anomalies and regional tectonic features – two case studies: southern Africa and Germany [PDF]
Solid Earth, 2016 Maps of magnetic and gravity field anomalies provide information about physical properties of the Earth's crust and upper mantle, helpful in understanding geological conditions and tectonic structures.
M. Korte, M. Mandea
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Inferences of mantle viscosity based on ice age data sets: Radial structure [PDF]
, 2016 We perform joint nonlinear inversions of glacial isostatic adjustment (GIA) data, including the following: postglacial decay times in Canada and Scandinavia, the Fennoscandian relaxation spectrum (FRS), late-Holocene differential sea level (DSL ...
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Magnetic Structure and its Tectonic Implication Around Longmenshan Fault Zone Revealed by EMAG2v3
Frontiers in Earth Science, 2022 The formation of magnetic minerals is bound up with the tectonic evolution history, whereupon the distribution of magnetic anomalies has great meanings for regional tectonics.
Yu Lei +6 more
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2021年5月22日玛多MS7.4地震震前岩石圈磁场变化特征分析
Dizhen xuebao, 2021 本文利用2019年和2020年两期的全国流动地磁矢量数据，针对玛多MS7.4地震震中附近的岩石圈磁场空间分布，分析研究了岩石圈磁场各个分量的震前变化特征。结果表明，玛多MS7.4地震发生前，震中附近的岩石圈磁场分量均发生了不同程度的变化：震中位于各分量的弱变化区域和零变线附近；震中位于各分量的高梯度带和低梯度带之间。本文证实了地震发生前会引起岩石圈磁场变化这一现象，并总结了震前地磁分量的变化特征，为今后强地震（尤其是M≥7.0地震）的震磁关系研究提供了一个震例参考。
Chao Dong +4 more
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Bayesian inversion for the filtered flow at the Earth's Core Mantle Boundary
, 2013 The inverse problem which consists of determining the flow at the Earth's Core Mantle Boundary according to an outer core magnetic field and secular variation model, has been investigated through a Bayesian formalism. To circumvent the issue arising from
Baerenzung, Julien +2 more
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