Results 21 to 30 of about 244 (74)

Archeomagnetic Intensity Spikes: Global or Regional Geomagnetic Field Features?

Frontiers in Earth Science, 2018
Variations of the geomagnetic field prior to direct observations are inferred from archeo- and paleomagnetic experiments. Seemingly unusual variations not seen in the present-day and historical field are of particular interest to constrain the full range
Monika Korte, Catherine G. Constable
doaj   +1 more source

Archaeointensity study of five Late Bronze Age fireplaces from Corent (Auvergne, France) [PDF]

, 2016
International audienceRecent excavations at Corent (France) unearthed a vast Late Bronze Age settlement. The high density of fireplaces especially highlights it. The present study focuses on the archaeomagnetic study of five fireplaces.
Aidona, Ben-Yosef, Chauvin, Ertepinar, Gallet, Gallet, Gallet, Gallet, Genevey, Genevey, Gómez-Paccard, Gómez-Paccard, Gómez-Paccard, Hervé, Hervé, Hervé, Hill, Hong, Kapper, Kovacheva, Kovacheva, Ledger, Milcent, Milcent, Moutmir, Pavón-Carrasco, Pavón-Carrasco, Prévot, Schnepp, Shaar, Tema, Thellier   +31 more
core   +3 more sources

New Archeomagnetic Directional Records From Iron Age Southern Africa (ca. 425–1550 CE) and Implications for the South Atlantic Anomaly

Geophysical Research Letters, 2018
The paucity of Southern Hemisphere archeomagnetic data limits the resolution of paleosecular variation models. At the same time, important changes in the modern and historical field, including the recent dipole decay, appear to originate in this region ...
Vincent J. Hare, John A. Tarduno, Thomas Huffman, Michael Watkeys, Phenyo C. Thebe, Munyaradzi Manyanga, Richard K. Bono, Rory D. Cottrell   +7 more
doaj   +1 more source

The impact of geomagnetic spikes on the production rates of cosmogenic 14C and 10Be in the Earth's atmosphere [PDF]

, 2015
We seek corroborative evidence of the geomagnetic spikes detected in the Near East ca. 980 BC and 890 BC in the records of the past production rates of the cosmogenic nuclides 14C and 10Be.
Alexandre Fournier, Bard, Beer, Ben-Yosef, Cooke, Courtillot, Fraser-Smith, Gallet, Gallet, Gennady A. Kovaltsov, Heikkilä, Holme, Hulot, Ilya Usoskin, Kovaltsov, Kovaltsov, Licht, Livermore, Mandea, McCracken, Muscheler, Philip W. Livermore, Reimer, Roberts, Roth, Ruth, Shaar, Steinhilber, Usoskin, Usoskin, Usoskin, Usoskin, Wessel, Yiou, Yves Gallet   +34 more
core   +3 more sources

Martin J. Aitken (1922-2017) [PDF]

, 2018
No abstract ...
Sanderson, David
core   +2 more sources

Explosive activity of the summit cone of Piton de la Fournaise volcano (La Réunion island): A historical and geological review [PDF]

, 2013
International audienceSummit explosive activity and collapses that form pit craters and calderas represent major volcanic hazards on a dominantly effusive, frequently active volcano like Piton de la Fournaise.
Di Muro, Andrea, Fadda, Pierluigi, Manta, Fabio, Michon, Laurent, Saint-Marc, Cécile, Villeneuve, Nicolas   +5 more
core   +2 more sources

Magnetic core field anomalies in the non-axial field during the last 3300 years: approach with an equivalent monopole source

Frontiers in Earth Science
The continuous update of the archeomagnetic database spanning the last 3,000 years has facilitated the refinement of geomagnetic field models, unveiling the presence of significant non-dipolar anomalies before instrumental measurements.
Pablo Rivera, Pablo Rivera, F. Javier Pavón-Carrasco, F. Javier Pavón-Carrasco, Angelo De Santis, Saioa A. Campuzano, Gianfranco Cianchini, María Luisa Osete, María Luisa Osete   +8 more
doaj   +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

Necessary Core‐Mantle Boundary Heat Flux Patterns for Recovering the Latitude of the South Atlantic Anomaly

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract The present‐day geomagnetic field at Earth's surface is characterized by an anomalously weak region known as the South Atlantic Anomaly (SAA). Numerical dynamo simulations with an imposed outer boundary heat flux pattern inferred from lowermost mantle seismic anomalies reproduce well the longitude of the SAA, but the latitudes of the modeled ...
Filipe Terra‐Nova, Hagay Amit
wiley   +1 more source