Results 71 to 80 of about 235 (87)

New archeointensity data from South Brazil and the influence of the South Atlantic Anomaly in South America

Earth and Planetary Science Letters, 2019
Abstract We obtained six new high-quality archeointensity results for the Pelotas city region, in South Brazil with ages ranging from 1790 to 1943 CE. Archeointensity measurements were performed with the double heating technique, including partial thermoremanent magnetization (pTRM) checks and pTRM tail-checks.
Gelvam A Hartmann, Ricardo I.F. Trindade, Wilbor Poletti   +2 more
exaly   +2 more sources

Holocene archeointensities from mid European ceramics, slags, burned sediments and cherts

Physics of the Earth and Planetary Interiors, 2015
Abstract The Earth’s geomagnetic field intensity in the past can be determined from archeological artifacts. These archeointensity data are important inputs for geomagnetic field models and local reference curves of Earth’s magnetic field. Although archeointensities have been measured on materials for more than half a century ago, data are still ...
Kathrin Lisa Kapper, Fabio Donadini, Ann M. Hirt   +2 more
openaire   +1 more source

Magnetic properties and Archeointensity of Earth’s magnetic field recovered from El Opeño, earliest funeral architecture known in Western Mesoamerica

Studia Geophysica Et Geodaetica, 2010
Despite of the impressive cultural heritage and abundant archaeological sites, absolute geomagnetic intensity data from Mesoamerica are still sparse. Archeointensity determinations using the Coe variant of the Thellier and Thellier method have been carried out on some selected pottery fragments from the El Openo archeological site which has the ...
Juan Morales, Manuel Calvo-Rathert, Avto Gogichaishvili   +2 more
exaly   +2 more sources

Evidence for rapid geomagnetic field intensity variations in Western Europe over the past 800 years from new French archeointensity data

Earth and Planetary Science Letters, 2009
Abstract The number of reliable archeointensity determinations obtained from Western Europe for the past millennium remains limited. Moreover, the large scatter between different datasets available is puzzling. The present study analyzed 31 new groups of baked clay (ceramic or brick) fragments sampled in France (29 groups) and in Belgium (2 groups ...
Agnès Genevey, Yves Gallet, Jean Rosen
exaly   +2 more sources

Archeointensities in Greece during the Neolithic period: New insights into material selection and secular variation curve

Physics of the Earth and Planetary Interiors, 2013
Numerous archeomagnetic studies have provided high quality data for both the direction and the intensity of the geomagnetic field, essentially in Europe for the last 10 millennia. In particular, Greece supplies a lot of archeological materials due to its impressive cultural heritage and volcanic activity, so that numerous data have been obtained from ...
Fanjat, Gregory, Aidona, E., Kondopoulou, D., Camps, Pierre, Rathossi, C., Poidras, Thierry   +5 more
openaire   +2 more sources

An integrated magnetic, geochemical and archeointensity investigation of casting debris from ancient metallurgical sites of Michoacán, Western Mesoamerica

Studia Geophysica et Geodaetica, 2017
The ability of baked clay-elaborated objects to record the temporal variations of both direction and intensity of the geomagnetic field at the time of their elaboration or last use has been widely used during the last decades to fill the gaps left by available time-discrete volcanic-rock logs for a better knowledge of the evolution of the geomagnetic ...
Juan Morales, María del Sol Hernández-Bernal, Avto Goguitchaichvili, José Luis Punzo-Díaz   +3 more
openaire   +1 more source

Geomagnetic field intensity in South America over the 500 years: New archeointensity results from South Brazil

2019
Tracing the field in the past at the centennial and millennial timescale (i.e., the archeomagnetic timescale) is important in improving geomagnetic field models and also for field forecast analyses. The distribution of archeomagnetic data across the globe is very inhomogeneous with almost all data coming from the northern hemisphere, particularly from ...
Gelvam Hartmann, Wilbor Poletti, Ricardo Trindade, Lucio Ferreira, Pedro Sanches   +4 more
openaire   +1 more source

Preliminary archeointensity results from well-dated ceramics from ancient Bactria (Uzbekistán, Central Asia).

2018
Peer ...
Gómez-Paccard, Miriam, Beamud, Elisabet, Martínez-Ferreras, V., Gurt-Esparraguera, J. M.   +3 more
openaire   +1 more source

Regional archeointensity curve from 600 BCE to 1700 CE for East Asia and possible recurrence of the weak field intensity

In recent years, there have been reports suggesting the possibility of the West Pacific Anomaly existing in East Asia during the 16th century. To verify whether the anomaly existed in other ages, reliable archeomagnetic intensity (archeointensity) measurements from fired archeological materials in East Asia are necessary.
Yutaka Yoshimura, Hyeon-Seon Ahn, Chie Kato, Yuhji Yamamoto, Chisato Anai, Yoshinori Tajiri, Tadahiro Hatakeyama, Masao Ohno   +7 more
openaire   +1 more source

Paleo- and archeointensity: methods, techniques and new results

Physics of the Earth and Planetary Interiors, 2004
Peter Riisager, Avto Gogichaishvili
openaire   +1 more source