Results 51 to 60 of about 13,255 (163)

The 1990.0 magnetic repeat station survey and normal reference fields for Italy

Annals of Geophysics, 1994
A survey of 116 repeat stations of the Italian Magnetic Network was carried out between 1989 and 1992. We describe the characteristics of the selected network repeat station sites, the characteristics of the measuring equipment, the data reduction ...
G. Dominici, A. De Santis, O. Battelli, A. Meloni   +3 more
doaj   +1 more source

How might magnetic secular variation impact avian philopatry? [PDF]

J Comp Physiol A Neuroethol Sens Neural Behav Physiol, 2022
Wynn J, Padget O, Morford J, Jaggers P, Davies K, Borsier E, Guilford T.   +6 more
europepmc   +1 more source

Evidence of secular variation in Archean crust formation in the Eastern Indian Shield. [PDF]

Sci Rep, 2022
Mandal P.
europepmc   +1 more source

Research on geomagnetic secular variation of China and surrounding areas based on the Geomagnetic Virtual Observatories

Earth and Planetary Physics
The Low Earth Orbit (LEO) geomagnetic satellites provide a large number of high-precision measurements, which are crucial for researching the Secular Variation (SV) of the geomagnetic field.
Jiang Li, Bin Chen
doaj   +1 more source

Why the 18.6 year tide cannot explain the change of sign observed in j₂ [PDF]

Advances in Geosciences, 2003
Recent studies show a change, starting in 1998, in the behavior of the variation of the dynamical flattening of the Earth (J2), supposed to be constant (secular), and mainly due to the post glacial rebound effect.
F. Deleflie, P. Exertier, G. Metris, P. Berio, O. Laurain, J.-M. Lemoine, R. Biancale   +6 more
doaj  

Geomagnetic secular variation forecast using the NASA GEMS ensemble Kalman filter: A candidate SV model for IGRF-13. [PDF]

Earth Planets Space, 2021
Tangborn A, Kuang W, Sabaka TJ, Yi C.
europepmc   +1 more source

Sensitivity of the auroral zones to temporal changes in Earth’s internal magnetic field

Journal of Space Weather and Space Climate
It is commonly accepted that the shape and temporal evolution of the auroral zones (here defined as the climatological average of the auroral ovals) are primarily influenced by the dipolar and high-latitude features of the geomagnetic field.
Maffei Stefano, Livermore Philip W., Mound Jonathan E.   +2 more
doaj   +1 more source

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

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

Time evolution of the South Atlantic Magnetic Anomaly

Anais da Academia Brasileira de Ciências, 2009
The South Atlantic Magnetic Anomaly (SAMA) is one of the most outstanding anomalies of the geomagnetic field. The SAMA secular variation was obtained and compared to the evolution of other anomalies using spherical harmonic field models for the 1590-2005
Gelvam A. Hartmann, Igor G. Pacca
doaj   +1 more source