Results 11 to 20 of about 519 (182)

Insights into pre-reversal paleosecular variation from stochastic models [PDF]

Frontiers in Earth Science, 2015
To provide insights on the paleosecular variation of the geomagnetic field and the mechanism of reversals, long time series of the dipolar magnetic moment are generated by two different stochastic models, known as the domino model and the inhomogeneous ...
Klaudio ePeqini, Bejo eDuka, Angelo eDe Santis   +2 more
doaj   +3 more sources

Paleosecular variation recorded by Quaternary lava flows from Guadeloupe Island. [PDF]

Sci Rep, 2018
AbstractPaleomagnetic directional data were obtained from fourteen 0 to 2 Ma old lava flows at Basse-Terre Island (Guadeloupe, French West Indies). Five reversed polarity flows are consistent with their Matuyama age between 1.6–1.5 Ma and 875–790 ka while the ages of the other nine normal polarity units tie them to the Olduvai subchron and the Brunhes ...
Ricci J, Carlut J, Valet JP.
europepmc   +6 more sources

Full‐Vector Paleosecular Variation Curve for the Azores: Enabling Reliable Paleomagnetic Dating for the Past 2 kyr [PDF]

Journal of Geophysical Research: Solid Earth, 2021
AbstractFor archeomagnetic dating, high‐quality directional and intensity paleosecular variation curves are needed. The Azores Archipelago in the mid‐Atlantic Ocean provides a wealth of volcanic products erupted during the Holocene, making it an ideal location to (1) gather paleomagnetic data from well dated lava flows and (2) construct a paleosecular ...
Annemarieke Béguin, Adriano Pimentel, Lennart V. de Groot   +2 more
core   +5 more sources

Updated Iberian Archeomagnetic Catalogue: New Full Vector Paleosecular Variation Curve for the Last Three Millennia [PDF]

Geochemistry, Geophysics, Geosystems, 2018
In this work, we present 16 directional and 27 intensity high‐quality values from Iberia. Moreover, we have updated the Iberian archeomagnetic catalogue published more than 10 years ago with a considerable increase in the database.
A. Molina‐Cardín, S. A. Campuzano, M. L. Osete, M. Rivero‐Montero, F. J. Pavón‐Carrasco, A. Palencia‐Ortas, F. Martín‐Hernández, M. Gómez‐Paccard, A. Chauvin, S. Guerrero‐Suárez, J. C. Pérez‐Fuentes, G. McIntosh, G. Catanzariti, J. C. Sastre Blanco, J. Larrazabal, V. M. Fernández Martínez, J. R. Álvarez Sanchís, J. Rodríguez‐Hernández, I. Martín Viso, D. Garcia i Rubert   +19 more
doaj   +2 more sources

Constraints on Brunhes low-latitude paleosecular variation Iztaccihuatl stratovolcano, basin of Mexico

Geofísica Internacional, 1995
Los datos paleomagnéticos para lavas del volcán Iztaccíhuatl permiten analizar la variación paleosecular del campo geomagnético en la región central de Mexico.
Jaime Urrutia-Fucugauchi
doaj   +3 more sources

Brunhes Paleomagnetic Directions and Paleointensities From Northern Hainan Island

Geochemistry, Geophysics, Geosystems
Paleomagnetic studies typically assume that the long‐term, time‐averaged geomagnetic field behaves as a geocentric axial dipole (GAD). While paleodirectional data over the past five million years generally agree with GAD predictions, mid‐to‐low latitude ...
Mengqing Wang, Huapei Wang, Huafeng Qin, Jian Luo, Chen Wen, Fei Han, Yiming Ma, Jiabo Liu   +7 more
doaj   +2 more sources

Bayesian Inference of Local Paleosecular Variation From Sparse Paleomagnetic Data

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract We introduce a novel Bayesian method to construct local paleosecular variation (PSV) curves. By modeling the geomagnetic field as a Gaussian process, global models can be incorporated as informative prior distributions. Because we use Hamiltonian Monte‐Carlo methods, complex age distributions resulting for example from radiocarbon calibration ...
M. A. Schanner, R. Meyer, L. V. de Groot
wiley   +3 more sources

On low-degree spherical harmonic models of paleosecular variation

Physics of the Earth and Planetary Interiors, 1996
Geomagnetic field directions over the past few millions of years have recently been compiled and these data bases can be used to build low-degree spherical harmonic models of the time-averaged field (TAF) and its paleosecular variation (PSV) variance structure.
Quidelleur, Xavier, Courtillot, Vincent
openaire   +3 more sources

Dipole/quadrupole family modeling of paleosecular variation

Journal of Geophysical Research: Solid Earth, 1988
Contrary to previous claims that the VGP scatter and its latitude variation deduced from the present field are atypical of those for the past 5 m.y., it is shown that it is in fact typical when correctly calculated. A simple and effective model for the paleosecular variation of lavas is developed by using this important observation together with the ...
P. L. McFadden, R. T. Merrill, M. W. McElhinny   +2 more
openaire   +2 more sources

A Holocene Paleosecular Variation Record From the Northwestern Ross Sea, Antarctica

Geochemistry, Geophysics, Geosystems
We present a mid‐to‐late Holocene record of relative paleosecular variation from the Ross Sea region of Antarctica. The 6,700‐year‐long record of inclination, declination, and relative paleointensity from a marine sediment core collected near Cape Adare ...
Olivia J. Truax, Faye Nelson, Christina R. Riesselman, Christian Ohneiser, Jae Il Lee, Kyu‐Cheul Yoo, Bob Dagg, Gary Wilson   +7 more
doaj   +2 more sources