Results 21 to 30 of about 198 (83)

Modeling geomagnetic spikes: the Levantine Iron Age anomaly

Earth, Planets and Space, 2023
The Levantine Iron Age anomaly (LIAA) is a regional short-decadal geomagnetic strength field variation located at the Levantine region characterized by high intensities with maximum virtual axial dipole moments around 190 ZAm2. It has been constrained by
Pablo Rivera, F. Javier Pavón-Carrasco, María Luisa Osete   +2 more
doaj   +1 more source

Magnetic properties and archeointensity determination on Pre-Columbian pottery from Chiapas, Mesoamerica [PDF]

Earth, Planets and Space, 2009
Abstract As part of the effort to establish an archeointensity variation curve for Mesoamerica, 13 archeologically well-identified pottery samples belonging to the Ocozocoautla site (Chiapas) were studied. Analyzed samples consist of ‘ofrenda type’ pottery fragments found in several caves. Three archeological intervals are involved: 450-100 B.
Morales, Juan, Goguitchaichvili, Avto, Acosta, Guillermo, González-Moran, Tomas, Alva-Valdivia, Luis, Robles-Camacho, Jasinto, del Sol Hernández-Bernal, Ma.   +6 more
openaire   +1 more source

Intensity of the geomagnetic field in Europe for the last 3 ka: Influence of data quality on geomagnetic field modeling

Geochemistry, Geophysics, Geosystems, 2014
One of the main challenges of paleomagnetic research is to obtain high‐resolution geomagnetic field intensity reconstructions. For the last millennia, these reconstructions are mostly based on archeomagnetic data.
Francisco Javier Pavón‐Carrasco, Miriam Gómez‐Paccard, Gwenaël Hervé, María Luisa Osete, Annick Chauvin   +4 more
doaj   +1 more source

The necessity of data availability in maintaining the value and longevity of paleointensity results

Frontiers in Earth Science, 2014
Asserting the reliability of paleointensity estimates, or comparing relative reliabilities between vastly or subtly different results is a key challenge for paleointensity studies, which often leaves interpretations of these data rife with ambiguities ...
Greig A. Paterson
doaj   +1 more source

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

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   +1 more source

One Hundred Thousand Years of Geomagnetic Field Evolution

Reviews of Geophysics, Volume 57, Issue 4, Page 1289-1337, December 2019., 2019
Abstract Paleomagnetic records from sediments, archeological artifacts, and lava flows provide the foundation for studying geomagnetic field changes over 0–100 ka. Late Quaternary time‐varying spherical harmonic models for 0–100 ka produce a global view used to evaluate new data records, study the paleomagnetic secular variation on centennial to ...
S. Panovska, M. Korte, C. G. Constable
wiley   +1 more source

A comprehensive paleomagnetic study from the last Plinian eruptions of Popocatepetl volcano: absolute chronology of lavas and estimation of emplacement temperatures of PDCs

Earth, Planets and Space, 2019
Three lava flows (Buenavista, Xalitzintla and Nealtican) and pyroclastic density currents (Lorenzo and Pink Pumice) from two Popocatepetl Plinian eruptions were sampled for paleomagnetic dating.
Nayeli Pérez-Rodríguez, Juan Morales, Avto Goguitchaichvili, Felipe García-Tenorio   +3 more
doaj   +1 more source

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

Geophysical Research Letters, Volume 45, Issue 3, Page 1361-1369, 16 February 2018., 2018
Abstract 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
wiley   +1 more source

Tracing the geomagnetic field intensity variations in Upper Mesopotamia during the Pottery Neolithic to improve ceramic-based chronologies [PDF]

, 2021
The transdimensional Bayesian method AH-RJMCMC applied to archeomagnetic intensity data available in the Balkans and the Near East allows us to estimate the variations in intensity of the geomagnetic field in Upper Mesopotamia during the 7th and 6th ...
Gallet, Y, Fournier, A, Fournier, A., Livermore, PW, Livermore, P.W., W, Gallet, Y.   +5 more
core   +1 more source

Assessing the Reliability of the Pseudo‐Thellier Estimates in Fired Ceramics and Source Clays

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.
Abstract The geomagnetic field's intensity is key to understanding the Earth's core dynamics and their surface impacts. While the Thellier–Thellier method remains the standard for recovering absolute paleointensity from baked materials, it is time‐consuming and may alter magnetic mineralogy due to heating cycles. The pseudo‐Thellier method offers a non‐
Wilbor Poletti, Mikaelly G. Rocha, Plínio Jaqueto, Gelvam A. Hartmann, Grasiane L. Mathias, Daniele Brandt, Ricardo I. F. Trindade, Paulo Maximiano   +7 more
wiley   +1 more source