Results 41 to 50 of about 108 (93)

Resolving the Interpretation of Magnetic Coercivity Components From Backfield Isothermal Remanence Curves Using Unmixing of Non‐Linear Preisach Maps: Application to Loess‐Paleosol Sequences

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 6, June 2024.
Abstract Unmixing of remanent magnetization curves, either isothermal remanent magnetization (IRM) or backfield IRM, is widely used in rock magnetic and environmental magnetic studies to discriminate between magnetic coercivity components of different origins. However, the wide range of physical properties of natural magnetic particles gives rise to an
Cristian Necula, Ioan Lascu, Cristian Panaiotu, Daniela Gheorghe   +3 more
wiley   +1 more source

Geomagnetic Field Intensity During the First Millennium BCE From Royal Judean Storage Jars: Constraining the Duration of the Levantine Iron Age Anomaly

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 5, May 2024.
Abstract The rich and extensively studied archaeological record of the Near East provides an opportunity to develop a comprehensive archaeomagnetic dataset for exploring the behavior of the geomagnetic field with high precision. The Levantine archaeomagnetic curve (LAC) project is an ongoing effort to develop a continuous high‐resolution geomagnetic ...
E. Hassul, R. Shaar, Y. Vaknin, A. Agnon, Y. Gallet, U. Leibner, R. Sabar, L. Freud, D. Sandhaus, O. Lipschits   +9 more
wiley   +1 more source

Correlation based modeling of the archeomagnetic field

, 2022
The geomagnetic main field is vital for live on Earth, as it shields our habitat against the solar wind and cosmic rays. It is generated by the geodynamo in the Earth’s outer core and has a rich dynamic on various timescales. Global models of the field are used to study the interaction of the field and incoming charged particles, but also to infer core
openaire   +4 more sources

Archeomagnetic Intensity Studies of South and Central America

Journal of geomagnetism and geoelectricity, 1965
Intensity of natural remanent magnetization of potteries from Peru, Bolivia and Mexico together with igneous rocks (lavas and pyroclastic rocks) from Mexico has been measured. The specimens cover the ages between about 0 A. D. and 1400 A. D. Most of the potteries and rocks have been found to contain magnetite or maghemite with titanium which is stable ...
NAGATA, Takesi, KOBAYASHI, Kazuo, SCHWARZ, E. J.   +2 more
openaire   +2 more sources

First Full‐Vector Archeomagnetic Data From Central Asia (3 BCE to 15 CE Centuries): Evidence for a Large Non‐Dipole Field Contribution Around the First Century BCE

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 2, February 2024.
Abstract Unraveling the short‐term behavior of the Earth's past geomagnetic field at regional scales is crucial for understanding its global behavior and, thus, the dynamics of the deep Earth. In this context, obtaining accurate full‐vector geomagnetic field records from regions where archeomagnetic data are absent becomes essential.
R. Bonilla‐Alba, M. Gómez‐Paccard, F. J. Pavón‐Carrasco, S. A. Campuzano, E. Beamud, V. Martínez‐Ferreras, J. M. Gurt‐Esparraguera, E. Ariño‐Gil, F. Martín‐Hernández, M. L. Osete   +9 more
wiley   +1 more source

An Interpretation of the Archeomagnetic Field Intensity

Journal of geomagnetism and geoelectricity, 1969
Available data of the ancient geomagnetic field intensity determined by the archeomagnetic measurement are compared with theoretically calculated curves of secular variation in the geomagnetic total force at three mutually remote sites. It is particularly remarkable that the anomalous archeomagnetic results from equatorial America (Peru, Bolivia and ...
openaire   +2 more sources

Core-flow constraints on extreme archeomagnetic intensity changes

Earth and Planetary Science Letters, 2014
Recent studies (Ben-Yosef et al., 2009; Shaar et al., 2011) propose extreme archeomagnetic intensity changes (termed spikes) in the range ~4-5μT/year c.a. 1000 BC in the Near East, around 40 to 50 times larger than values typical of the present-day. In order to investigate whether such extreme changes are consistent with a model of the source region of
Livermore, Philip W., Fournier, Alexandre, Gallet, Yves   +2 more
openaire   +2 more sources

Institute of Geology and Geophysics, Chinese Academy of Sciences-The time-space exploration from Earth core to galaxies. [PDF]

Natl Sci Rev, 2021
Zhang W, Zhao W, Zhao L.
europepmc   +1 more source

Archeomagnetic intensity study of Indian potshards from Quebec, Canada.

Journal of geomagnetism and geoelectricity, 1982
Eight potshards from the archeological site of Pointe du Buisson near Montreal were used to derive the variation in local geomagnetic intensity in the period between 500 B. C. and 1400 A. D. (seriation dates) and to compare the results to those obtained for Indian potshards from Southwestern Ontario.
ARBOUR, G., SCHWARZ, E. J.
openaire   +3 more sources

Subterranean clues to the future of our planetary magnetic shield. [PDF]

Proc Natl Acad Sci U S A, 2018
Tarduno JA.
europepmc   +1 more source