Results 21 to 30 of about 1,592 (224)

Bulgarian Geomagnetic Reference Field (BulGRF) for 2015.0 and secular variation prediction model up to 2020 [PDF]

open access: yesAnnales Geophysicae, 2017
The Bulgarian Geomagnetic Reference Field (BulGRF) for 2015.0 epoch and its secular variation model prediction up to 2020.0 is produced and presented in this paper.
M. Metodiev, P. Trifonova
doaj   +2 more sources

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm   +2 more
wiley  

+2 more sources

The development of a regional geomagnetic daily variation model using neural networks [PDF]

open access: yesAnnales Geophysicae, 2000
Global and regional geomagnetic field models give the components of the geomagnetic field as functions of position and epoch; most utilise a polynomial or Fourier series to map the input variables to the geomagnetic field values.
P. R. Sutcliffe
doaj   +1 more source

Valuation of induction current contribution to the secular variation of geomagnetic field (according to the data of Ukrainian geomagnetic observatories)

open access: yesГеофизический журнал, 2014
Induction current contribution to the secular variation of geomagnetic field in accordance with the data of Ukrainian geomagnetic observatories has been investigated.
M.I. Orlyuk   +3 more
doaj   +1 more source

Geomagnetic Dipole Changes and Upwelling/Downwelling at the Top of the Earth's Core

open access: yesFrontiers in Earth Science, 2018
The convective state of the top of Earth's outer core is still under debate. Conflicting evidence from seismology and geomagnetism provides arguments for and against a thick stably stratified layer below the core-mantle boundary.
Ludovic Huguet   +3 more
doaj   +1 more source

A secular variation candidate model for IGRF-13 based on Swarm data and ensemble inverse geodynamo modelling

open access: yesEarth, Planets and Space, 2021
This paper describes the design of a candidate secular variation model for the 13th generation of the International Geomagnetic Reference Field. This candidate is based upon the integration of an ensemble of 100 numerical models of the geodynamo between ...
Alexandre Fournier   +3 more
doaj   +1 more source

Dynamic mode decomposition of the geomagnetic field over the last two decades

open access: yesEarth and Planetary Physics, 2023
Earth's magnetic field, which is generated in the liquid outer core through the dynamo action, undergoes changes on timescales of a few years to several million years, yet the underlying mechanisms responsible for the field variations remain to be ...
JuYuan Xu, YuFeng Lin
doaj   +1 more source

South Atlantic Anomaly Areal Extent as a Possible Indicator of Geomagnetic Jerks in the Satellite Era

open access: yesFrontiers 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

Geomagnetic secular variation [PDF]

open access: yesEos, Transactions American Geophysical Union, 1971
This review attempts to reference the works on geomagnetic secular change that have appeared by authors based, even if temporarily, in the United States since 1967. It is thus an extension of the last portion of the paper given for the 1967 ‘Main Geomagnetic Field’ IUGG report [Cain, 1967], excluding the topics of field models and magnetic surveys ...
openaire   +1 more source

Studying diurnal and secular variations of the Earth's magnetic field using data from Yangibazar magnetic observatory (Uzbekistan)

open access: yesRussian Journal of Earth Sciences, 2022
The article provides information about the Yangibazar geomagnetic observatory, managed by the Institute of Seismology of the Academy of Sciences of the Republic of Uzbekistan.
Yusupov Valizhon   +2 more
doaj   +1 more source

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