Measuring chandler wobble amplitude variations using IERS EOP C04 data [PDF]
Serbian Astronomical Journal, 2023 We analyzed the Earth's long-term polar motion using the time series IERS EOP C04 (International Earth Rotation and Reference Systems Service - IERS; Earth Orientation Parameters - EOP; Combination of four (04) techniques - C04), from 1984 to ...
Damljanović G., Vasilić V.
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High-Fidelity Archeointensity Results for the Late Neolithic Period From Central China [PDF]
, 2020 Archeomagnetism focuses on exploring high-resolution variations of the geomagnetic field over hundreds to thousands of years. In this study, we carried out a comprehensive study of chronology, absolute and relative paleointensity on a late Neolithic site
Cai, S +6 more
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Worldwide wavelet analysis of geomagnetic jerks [PDF]
Journal of Geophysical Research: Solid Earth, 1996 Following an earlier study which gives the principles of the method and an example of application to the eastern component of the magnetic field in the European region [Alexandrescu et al., 1995], detection and characterization of geomagnetic jerks using wavelet analysis is generalized to any horizontal component of the field and to a worldwide ...
Alexandrescu, Mioara +4 more
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Mantle Electrical Conductivity Estimates From Geomagnetic Jerk Observations [PDF]
11th International Congress of the Brazilian Geophysical Society, 2009 The electrical conductivity of the Earth’s mantle has been a subject of much debate in the last few years. Induction studies agree mainly in the first 1000 km of the mantle, however in the lower mantle the conductivity is still very uncertain. Experimental studies of mineral physics simulating the conditions of the deep mantle have been performed and ...
K. Pinheiro, A. Jackson, J. Velímnsky
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Free core nutation: new large disturbance and connection evidence with geomagnetic jerks [PDF]
, 2015 Variations in free core nutation (FCN) are connected with various processes in the Earth's fluid core and core-mantle coupling, which are also largely responsible for the geomagnetic field variations, particularly the geomagnetic jerks (GMJs). A previous
Malkin, Zinovy
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Regional character of geomagnetic field directional circularity: Holocene Eastern North America
Frontiers in Earth Science, 2023 This study characterizes the paleomagnetic secular variation (PSV) in five Holocene records from Eastern North America. We have determined equi-spaced (100-year) declination and inclination time series for the five sites and compared their directional ...
Steven P. Lund
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Can core-surface flow models be used to improve the forecast of the Earth's main magnetic field? [PDF]
, 2008 [1] Geomagnetic main field models used for navigation are updated every 5 years and contain a forecast of the geomagnetic secular variation for the upcoming epoch. Forecasting secular variation is a difficult task.
Alexandrescu +46 more
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Evidence for a geomagnetic jerk in 1990 across Europe
Annals of Geophysics, 1995 The analysis of geomagnetic data from magnetic observatories demonstrated the existence of very rapid changes, or jerks, in the secular variation, especially the occurrence of the well known geomagnetic jerks of 1969 and 1978.
A. Meloni, L. Cafarella
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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
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Signs of a new geomagnetic jerk between 2019 and 2020 from Swarm and observatory data
Earth, Planets and Space, 2021 Highlights Observatory and Swarm data reveal a new geomagnetic jerk around 2019–2020. A very recent geomagnetic field model indicates the global character of the new jerk. A new pulse at the CMB around mid-2018 seems to be the starting point of this jerk.
F. Javier Pavón-Carrasco +3 more
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