Results 11 to 20 of about 733 (165)
On the characteristics of successive geomagnetic jerks [PDF]
Earth, Planets and Space, 2014 Spherical harmonic models of the 1969, 1979 and 1992 geomagnetic jerks are computed using data from about 160 worldwide geomagnetic observatories. The dominance of the internal origin part with respect to the external one confirms again the internal origin of these events. A change of sign is observed between two successive jerks (1969–1979, 1979–1992).
Gauthier Hulot +3 more
core +4 more sources
IGRF-14 secular variation prediction from core surface flow acceleration [PDF]
Earth, Planets and SpaceThe International Geomagnetic Reference Field (IGRF) has been regularly updated since its inception in 1965. Every recent iteration contains an estimate of the geomagnetic secular variation (SV), for the intermediate years between iterations. We submit a
Frederik Dahl Madsen +5 more
doaj +2 more sources
Geomagnetic jerks in the Swarm Era [PDF]
, 2016 The timely provision of geomagnetic observations as part of the ESA Swarm mission means analysis and modelling can be conducted rapidly and kept up-to-date in a manner not possible before.
Beggan, Ciaran +2 more
core +4 more sources
Frontiers in Earth Science, 2021 Geomagnetic jerks are sudden changes in the geomagnetic field secular variation related to changes in outer core flow patterns. Finding geophysical phenomena related to geomagnetic jerks provides a vital contribution to better understand the geomagnetic ...
S. A. Campuzano +6 more
doaj +1 more source
Geodesy and Geodynamics, 2022 The period and quality factor of the Chandler wobble (CW) are useful for constraining the Earth's internal structure properties, such as the mantle elasticity.
Yachong An, Hao Ding
doaj +1 more source
Contributions to Geophysics and Geodesy, 2022 Versus the theory of fully stochastically mechanism of geomagnetic jerks based on the buoyant force driven Quasi-Geostrophic (QG) dynamo, the torsional waves in realistic condition of the Earth's core evolve in the intradecadal time scales.
Mohsen LUTEPHY +2 more
doaj +1 more source
A taxonomy of simulated geomagnetic jerks
Geophysical Journal International, 2022 SUMMARYGeomagnetic jerks—abrupt changes in the acceleration of Earth’s magnetic field that punctuate geomagnetic records— have been richly documented over the past decades by taking advantage of the complementary strengths of ground observatory and satellite measurements.
Aubert, Julien +4 more
openaire +7 more sources
Rescue and quality control of historical geomagnetic measurement at Sheshan observatory, China [PDF]
Earth System Science Data, 2022 The Sheshan Geomagnetic Observatory (International Association of Geomagnetism and Aeronomy (IAGA) code SSH), China was built in Xujiahui, Shanghai in 1874 and moved to Sheshan, Shanghai at the end of 1932.
S. Zhang +7 more
doaj +1 more source
IRREGULARITIES IN THE DISPLACEMENT OF THE EARTH’S GEOGRAPHIC POLE AND JERKS IN THE GEOMAGNETIC FIELD
Геодинамика и тектонофизика, 2023 There are presented the results of analysis of some irregularities in the series of displacement coordinates on the Earth’s surface for the geographic North Pole in order to relate them temporally to some global jerks in the geomagnetic field.
G. S. Kurbasova, A. E. Volvach
doaj +1 more source
Geomagnetic field declination: from decadal to centennial scales [PDF]
Solid Earth, 2018 Declination annual mean time series longer than 1 century provided by 24 geomagnetic observatories worldwide, together with 5 Western European reconstructed declination series over the last 4 centuries, have been analyzed in terms of the frequency ...
V. Dobrica, C. Demetrescu, M. Mandea
doaj +1 more source