Results 41 to 50 of about 6,743 (215)
Geomagnetic secular variation in the Antarctic region during 1960-1975
Antarctic Record, 1982 The annual mean values of the geomagnetic three components (X, Y, Z) at 20 stations located between the South Pole and the 30°S latitude circle during 15 years from 1960 to 1975 are examined to study on the geomagnetic secular variation in the southern ...
Takesi Nagata
doaj +1 more source
SECULAR BEHAVIOR IN THE GEOMAGNETIC DATA AT PERMANENTOBSERVATORIES IN ARGENTINA
Anales (Asociación Física Argentina)The secular variation of the geomagnetic field is the temporal variation that takes place in the field on time scales between few years to hundreds or thousands of years.
P. A. Sallago
doaj +1 more source
Bootstrapping Swarm and observatory data to generate candidates for the DGRF and IGRF-13
Earth, Planets and Space, 2020 As posted by the Working Group V of the International Association of Geomagnetism and Aeronomy (IAGA), the 13th generation of the International Geomagnetic Reference Field (IGRF) has been released at the end of 2019.
F. Javier Pavón-Carrasco +5 more
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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
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Detection of Phase Jumps of Free Core Nutation of the Earth and their Concurrence with Geomagnetic Jerks [PDF]
, 2004 We detected phase jumps of the Free Core Nutation (FCN) of the Earth directly from the analysis of the Very Long Baseline Interferometer (VLBI) observation of the Earth rotation for the period 1984-2003 by applying the Weighted Wavelet Z-Transform (WWZ ...
A Toomre +20 more
core +3 more sources
An Ensemble Algorithm Based Component for Geomagnetic Data Assimilation
Terrestrial, Atmospheric and Oceanic Sciences, 2015 Geomagnetic data assimilation is one of the most recent developments in geomagnetic studies. It combines geodynamo model outputs and surface geomagnetic observations to provide more accurate estimates of the core dynamic state and provide accurate ...
Zhibin Sun and Weijia Kuang
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Wavelet analysis of secular geomagnetic variations [PDF]
Russian Journal of Earth Sciences, 2003 Temporal characteristics of secular variations (SV ) over the last hundred of years are studied using the wavelet transformation, providing estimates of dispersion and energy parameters of the process analyzed. The presence of abrupt geomagnetic field variations of the intraterrestrial origin in periods of 1969-1970 and 1989-1990 is confirmed.
N. M. Rotanova +2 more
openaire +1 more source
Loess Studies in Aotearoa New Zealand
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.Loess in Aotearoa New Zealand (ANZ) has been studied since its first documented recognition (on Banks Peninsula) in 1878 by Julius von Haast. A decade later, John Hardcastle revealed that southern ANZ loess was both glacial in origin and contained signals of past climates.
Brent V. Alloway +4 more
wiley +1 more source
The United States Magnetotelluric Array and the National Impedance Map
Reviews of Geophysics, Volume 64, Issue 2, June 2026.Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert +7 more
wiley +1 more source
Why the sunspot cycle is double peaked [PDF]
, 2011 Many sunspot cycles are double peaked. In 1967 Gnevyshev suggested that actually all cycles have two peaks generated by different physical mechanisms, but sometimes the gap between them is too short for the maxima to be distinguished in indices of the ...
Georgieva, Katya
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