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Catanzariti, G.
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Catanzariti, G.
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- PublicationOpen AccessUpdated Iberian Archeomagnetic Catalogue: New Full Vector Paleosecular Variation Curve for the Last Three Millennia(2018-10-03)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;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. This has led to a notable improvement of both temporal and spatial data distribution. A full vector paleosecular variation curve from 1000 BC to 1900 AD has been developed using high-quality data within a radius of 900 km from Madrid. A hierarchical bootstrap method has been followed for the computation of the curves. The most remarkable feature of the new curves is a notable intensity maximum of about 80 μT around 600 BC, which has not been previously reported for the Iberian Peninsula. We have also analyzed the evolution of the paleofield in Europe for the last three thousand years and conclude that the high maximum intensity values observed around 600 BC in the Iberian Peninsula could respond to the same feature as the Levantine Iron Age Anomaly, after travelling westward through Europe.75 26 - PublicationRestrictedFirst archaeomagnetic field intensity data from Ethiopia, Africa (1615 ± 12 AD)(2015-03-11)
; ; ; ; ; ; ;Osete, M. L.; Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Avda Complutense s/n, 28040 Madrid, Spain ;Catanzariti, G.; Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Avda Complutense s/n, 28040 Madrid, Spain ;Chauvin, A.; Géosciences-Rennes, CNRS, UMR 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes, Cedex, France ;Pavón-Carrasco, F. J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Roperch, P.; Géosciences-Rennes, CNRS, UMR 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes, Cedex, France ;Fernández, V. M.; Departamento de Prehistoria, Universidad Complutense de Madrid, 28040 Madrid. Spain; ; ; ; ; First archaeointensity determinations have been obtained from Ethiopia. Seven bricks (34 specimens) from the Däbsan archaeological remains were subjected to archaeointensity determination by means of classical Thellier–Thellier experiment including tests for magnetic anisotropy and magnetic cooling rate dependency. The age of the Däbsan Palace is well controlled by historical information: between 1603, when land grants were conceded to the Jesuits and the Catholicism was established as the official religion in Ethiopia, and the age of the Palace foundation in 1626–27. Successful archaeointensity determinations were obtained in 27 specimens from five individual bricks revealing an average field value of 33.5 ± 1.1 lT, which is 11–26% lower than expected values from global geomagnetic models based on historical and archaeomagnetic data. Global models for 1615 AD predict a low in central-southern Africa related to past location of the present Southern Atlantic Anomaly (SAA). Our results suggest that the field intensity in central Africa may have been slightly lower than global model predictions. This would indicate that the low could be probably more extended towards central-eastern Africa (or more intense) than previously considered. Further data from this region are especially welcome to delineate the evolution of the SAA.196 32