Results 11 to 20 of about 80 (64)

A multimethod paleointensity approach applied to the historical Xitle lava flows (Central Mexico): towards the accurate paleointensity determination

Earth, Planets and Space, 2020
An inclusive rock-magnetic and absolute paleointensity survey of the ~ 2-ka-old Xitle volcano (southerly Basin of Mexico) was undertaken to assess the faithfulness of the paleomagnetic log carried by fresh, widely exposed and well-preserved lava flows ...
Juan Morales, Nayeli Pérez-Rodríguez, Avto Goguitchaichvili, Miguel Cervantes-Solano   +3 more
doaj   +1 more source

Recent Advances in Chinese Archeomagnetism

Frontiers in Earth Science, 2017
The geomagnetic field is one of Earth's fundamental properties with a history of ~3.5 Gyr. The field, generated in Earth's core is a window to the deep interior of Earth and may have played a key role in evolution of life on our planet.
Shuhui Cai, Shuhui Cai, Shuhui Cai, Lisa Tauxe, Greig A. Paterson, Greig A. Paterson, Chenglong Deng, Chenglong Deng, Chenglong Deng, Yongxin Pan, Yongxin Pan, Yongxin Pan, Huafeng Qin, Huafeng Qin, Rixiang Zhu, Rixiang Zhu, Rixiang Zhu   +16 more
doaj   +1 more source

Effects of Global Geomagnetic Field Variations Over the Past 100,000 Years on Cosmogenic Radionuclide Production Rates in the Earth's Atmosphere

Journal of Geophysical Research: Space Physics, Volume 128, Issue 8, August 2023., 2023
Abstract The production rates of cosmogenic radionuclides, such as 10Be, 14C, and 36Cl, in the Earth's atmosphere vary with the geomagnetic field and solar activity. For the first time, the production rates of several cosmogenic nuclides are estimated for the past 100 ka based on global, time‐dependent geomagnetic field models and a moderate solar ...
Sanja Panovska, Stepan Poluianov, Jiawei Gao, Monika Korte, Alexander Mishev, Yuri Y. Shprits, Ilya Usoskin   +6 more
wiley   +1 more source

Short-Term Magnetic Field Variations From the Post-depositional Remanence of Lake Sediments

Frontiers in Earth Science, 2018
Paleomagnetic records obtained from lake sediments provide important constraints on geomagnetic field behavior. Secular variation recorded in sediments is used in global geomagnetic field models, particularly over longer timescales when archeomagnetic ...
Andreas Nilsson, Neil Suttie, Mimi J. Hill   +2 more
doaj   +1 more source

Magnetic characteristics and archeointensity determination on Mesoamerican Pre-Columbian Pottery from Quiahuiztlan, Veracruz, Mexico [PDF]

Geofísica Internacional, 2008
We report a detailed archeomagnetic investigation on pre-Columbian potteries from Quiahuiztlan, Veracruz, from ~900 AD to 1521 AD. Archeological samples analyzed by modern magnetic techniques carry a stable univectorial thermoremanent magnetization under
M. Calvo Rathert, A. Goguitchaichvili, J. Morales, B. Aguilar Reyes, J. M. López-Téllez, J. Urrutia Fucugauchi   +5 more
doaj  

A Hierarchical Bayesian Model for the Global Holocene Geomagnetic Field

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract We present a hierarchical Bayesian model of the global geomagnetic field for the last 8,000 years. The model is built solely with thermoremanent records, which include archeomagnetic and volcanic data. Building upon previous work, this model includes fewer approximations and treats model hyperparameters as probabilistic variables.
M. A. Schanner, S. Panovska, M. Korte
wiley   +1 more source

Reconstruction of Core‐Surface Flows During the Last 3,300 Years

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Understanding the Earth's magnetic field evolution requires examining the fluid flow at the core‐mantle boundary that drives the changes over different timescales. The inversion process to derive core‐surface flow velocities from secular variation data encounters non‐uniqueness issues, necessitating a priori assumptions that yield different ...
Pablo Rivera, F. J. Pavón‐Carrasco, M. L. Osete   +2 more
wiley   +1 more source

Archeointensity Database and Geomagnetic Field Reference Curves for South America Over the Past 5 Millennia

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract The study of variations in geomagnetic field intensity over time and space is crucial to understand the evolution of the geodynamo and its interactions with the Earth's surface. In this work, we introduce the SAGEOMAG (South America GEOMAGnetic) database, a comprehensive and updated repository of geomagnetic field intensity records derived ...
Victor J. O. Marum, Filipe Terra‐Nova, Gelvam A. Hartmann, Erwan Thébault, Plinio Jaqueto, Wilbor Poletti, Ricardo I. F. Trindade   +6 more
wiley   +1 more source

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   +1 more source

Brunhes Paleomagnetic Directions and Paleointensities From Northern Hainan Island

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract 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 paleointensity records fail to show GAD, with high values from Hawaii.
Mengqing Wang, Huapei Wang, Huafeng Qin, Jian Luo, Chen Wen, Fei Han, Yiming Ma, Jiabo Liu   +7 more
wiley   +1 more source