Results 81 to 90 of about 1,386 (209)
Pattern of Inner‐Core Differential Rotation From Long‐Term Earthquake Sequences and USArray Network
Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.Abstract How the differential rotation of the Earth's inner core (IC) has changed over time provides insights into the dynamics of the Earth's interior. Analyses of repeating earthquakes (doublets) have yielded different models. Here we present an event‐based investigation using individual events from long‐term earthquake sequences, which improves ...
Kaixin Wu, Xiaodong Song, Yi Yang
wiley +1 more source
Geochemistry, Geophysics, GeosystemsPaleosecular variation analysis is a primary tool for characterizing ancient geomagnetic behavior and its evolution through time. This study presents a new high‐quality directional data set, paleosecular variation of the Paleogene (PSVP), with and ...
Y. A. Engbers +8 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.Abstract Bulk (whole sample) magnetic properties of three‐hundred‐sixty‐two samples from five North Atlantic Ocean sediment cores are compared to the magnetic properties of five grain‐size fractions separated from the same samples. The relative abundance and magnetic properties of the size fractions are highly variable both within a core and among ...
R. G. Hatfield +5 more
wiley +1 more source
Saturation and time dependence of geodynamo models
, 2010 International audienceIn this study we address the question under which conditions a saturated velocity field stemming from geodynamo simulations leads to an exponential growth of the magnetic field in a corresponding kinematic calculation.
Cameron, R. +7 more
core +1 more source
Journal of Geography (Chigaku Zasshi), 2005 Recent progress of numerical simulations on the dynamo process in the core and the mantle convection provides a clue to understanding the origin of global variations of the Earth system during the last 150 Ma, in which long-term variations of geomagnetic reversal frequency and mantle activity are closely related in time.
HAMANO, Yozo +2 more
openaire +2 more sources
Geodesy and Geodynamics, 2019 The observed Earth's polar motion on decadal time scales has long been conjectured to be excited by the exchange of equatorial angular momentum between the solid mantle and the fluid outer core, via the mechanism of electromagnetic (EM) core-mantle ...
Weijia Kuang +2 more
doaj +1 more source
A geodynamo model incorporating a finitely conducting inner core. [PDF]
, 1993 Hollerbach, R. and Jones, C.A., 1993. A geodynamo model incorporating a finitely conducting inner core. Phys. Earth Planet. Inter., A direct spectral solution is presented for the mean-field geodynamo equations.
Chris A Jones, Rainer Hollerbach
core
Mode analysis of numerical geodynamo models
, 2011 International audienceIt has been suggested in Hoyng (2009) that dynamo action can be analysed by expansion of the magnetic field into dynamo modes and statistical evaluation of the mode coefficients. We here validate this method by analysing a numerical
Schmitt, D. +5 more
core +1 more source
Reversals and Large-Scale Variations of the Geomagnetic Field: Similarities and Differences
Russian Journal of Earth SciencesIt is shown that during reversals in geodynamo models the minimum amplitudes of the dipole, quadrupole and octupole coincide. Since the characteristic time of the reversal is close to the oscillations of the large-scale geomagnetic field, a similar ...
Reshetnyak Maxim
doaj +1 more source
Intermittence and peculiarities of a statistic characteristic of the geomagnetic field in geodynamo models [PDF]
, 2017 © 2017, Pleiades Publishing, Ltd. The analysis of the statistical characteristics of the geomagnetic field generated in the numerical geodynamo models has shown that the distribution of the spherical harmonic coefficients in some cases is not Gaussian ...
F. Lhuillier +5 more
core +1 more source