Results 61 to 70 of about 4,333 (248)

Stochastic forecasting of the geomagnetic field from the COV-OBS.x1 geomagnetic field model, and candidate models for IGRF-12 [PDF]

Earth, Planets and Space, 2015
We present the geomagnetic field model COV-OBS.x1, covering 1840 to 2020, from which have been derived candidate models for the IGRF-12. Towards the most recent epochs, it is primarily constrained by first differences of observatory annual means and measurements from the Oersted, Champ, and Swarm satellite missions.
Gillet, Nicolas, Barrois, Olivier, Finlay, Chris; id_orcid 0000-0002-4592-2290   +2 more
openaire   +2 more sources

Quantitative study on the characteristics of dynamic vehicle interference to geomagnetic field

地震科学进展
In recent years, geomagnetic observation stations have been subjected to more and more serious interference by HVDC transmission, subway, vehicles, etc.
Qin Tian, Xiujuan Hu, Guoping Chang, Shaopeng He, Pengkun Guo   +4 more
doaj   +1 more source

Secular variations of geomagnetic declination in the Karadag point and the global helio-geodynamic processes

Геофизический журнал, 2019
To study the changes in the local variations of geomagnetic field, the Karadag point was chosen due to the fact that we found previously on increased insolation and the surface temperature of the earth at this point over the last century (compared to ...
A. E. Volvach, G. S. Kurbasova
doaj   +1 more source

Metrology for Quantum Hardware Standardization—Charting a Pathway: A Strategic Review

IEEJ Transactions on Electrical and Electronic Engineering, Volume 21, Issue 9, Page 1282-1296, September 2026.
Advances in quantum mechanics have long underpinned metrology by enabling practical realizations of units through quantum effects. With the 2019 SI revision, traceability is anchored in defined fundamental constants, reinforcing the quantum‐mechanical basis of modern standards. In parallel, quantum technologies are transitioning from laboratory science
Nobu‐Hisa Kaneko
wiley   +1 more source

Integrated Multi‐Physics Characterisation of the Northern Kiruna Mining District With Machine‐Learning‐Assisted Interpretation

Geophysical Prospecting, Volume 74, Issue 7, September 2026.
ABSTRACT Integrated earth modelling aims to combine all available geoscientific information to derive one common earth model. However, combining multiple parameters in a meaningful way remains challenging. In this study, we aim to improve mineral exploration workflows through the integration of new magnetotelluric data with other geophysical and ...
Oskar Rydman, Ervin Veress, Maxim Yu. Smirnov, Tobias E. Bauer, Thorkild M. Rasmussen, Niklas Juhojuntti   +5 more
wiley   +1 more source

Geomagnetic core field models and secular variation forecasts for the 13th International Geomagnetic Reference Field (IGRF-13)

Earth, Planets and Space, 2020
Observations of the geomagnetic field taken at Earth’s surface and at satellite altitude are combined to construct continuous models of the geomagnetic field and its secular variation from 1957 to 2020.
I. Wardinski, D. Saturnino, H. Amit, A. Chambodut, B. Langlais, M. Mandea, E. Thébault   +6 more
doaj   +1 more source

Controls on Solar Wind Entry Identified Through Wind–ACE Heavy‐Ion Diagnostics

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Solar wind (SW) entry into the magnetosphere occurs through several mechanisms, but their dependence on the properties of different ion species is unknown. We compare measurements from Wind‐STICS (magnetosphere) with ACE‐SWICS (L1) to test for any preferential entry between He2+ and SW heavy ions.
S. Colón‐Rodríguez, M. W. Liemohn, J. M. Raines, S. T. Lepri   +3 more
wiley   +1 more source

A Variational Approach for Modeling the Inductive Response of Earth's Mantle to Time‐Varying External Geomagnetic Source

Earth and Space Science
A mathematical and numerical framework is developed for modeling Earth's magnetic field and optimizing the trajectory of the whole system using geomagnetic observations.
Kuan Li
doaj   +1 more source

A new high-resolution geomagnetic field model for southern Africa

South African Journal of Science
Earth’s magnetic field is a dynamic, changing phenomenon. The geomagnetic field consists of contributions from several sources, of which the main field originating in Earth’s core makes up the bulk.
Amore E. Nel, Achim Morschhauser, Foteini Vervelidou, Jürgen Matzka   +3 more
doaj   +1 more source

Ukrainian geomagnetic repeat station network and results of the field work reduced to the epoch 2005.5

Annals of Geophysics, 2013
The results of geomagnetic field components of the renewed Ukrainian repeat stations (RS) network are presented. The methods of absolute geomagnetic and astro-geodetic measurements are described.
Valentyn Maksymchuk, Myxailo Orlyuk, Viktor Tregybenko, Yurij Horodyskyy, Dmytro Marchenko   +4 more
doaj   +1 more source