Results 81 to 90 of about 19,448,839 (267)

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

Statistical relationships between variations of the geomagnetic field, auroral electrojet, and geomagnetically induced currents

Solar-Terrestrial Physics, 2019
Using observations from the IMAGE magnetic observatories and the station for recording geomagnetically induced currents (GIC) in the electric transmission line in 2015, we examine relationships between geomagnetic field and GIC variations.
Vorobev A.V., Pilipenko V.A., Sakharov Ya.A., Selivanov V.N.   +3 more
doaj   +1 more source

Onset of Thrusting at ca. 23 Ma in East Kunlun Mountains, Northern Tibet, Recorded by Syntectonic Strata

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract The timing of Cenozoic deformation in the East Kunlun Mountains, northern Tibet, is crucial for understanding plateau growth but remains disputed due to the scarcity of direct chronological constraints on specific tectonic structures. Here, we present a high‐density‐sampling magnetostratigraphic record from the Xiaohongshan section, interior ...
Leyi Li, Hong Chang, Balázs Bradák, Xiaoke Qiang   +3 more
wiley   +1 more source

Development of a Systematic Model for Study on the Phenomena of Ionospheric and Geomagnetic Variations [PDF]

Journal of Astronomy and Space Sciences, 1999
Solar activities ejecting high energy particles influence satellites and satellite communications as well as perturb geomagnetic fields. To understand space environments near the Earth being influenced by the Sun, we must study about the magnetosphere ...
Yoo Surn Pyo, Hwang-Jae Rhee, Min-Geun Kim, Eunhwa Kim, Sung-Hee Song, Jinny Lee, Dong-Hun Lee   +6 more
doaj  

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

Geomagnetic Main-Field Modelling with POGS Satellite Data

Journal of geomagnetism and geoelectricity, 1997
Models of the geomagnetic main field of degree and order 13 are constructed for epoch 1992.5. These are based on combinations of (quiet-time, low activity) Polar Orbiting Geomagnetic Survey (POGS) total intensity data, and various near-surface, largely vector, measurements.
Thomson, A. W. P., Macmillan, S., Barraclough, D. R.   +2 more
openaire   +2 more sources

Unusual Enhancement in He(23S) Airglow Brightness Associated With Interplanetary Magnetic Field Northward Turnings During the 2025 New Year's Day Storm

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract The upper thermosphere is important in the context of space weather, but continuous monitoring of the thermosphere at high latitudes remains limited despite its strong variations associated with geomagnetic activity. Orthohelium, He(23S), is found from the upper thermosphere to lower exosphere, and is a promising tracer of atmospheric dynamics.
Takanori Nishiyama, Masato Kagitani, Noora Partamies, Daniel Whiter, Takuo T. Tsuda, Yasunobu Ogawa, Fred Sigernes   +6 more
wiley   +1 more source

Quantifying the Effects of Nickel on Earth’s Inner‐Core Nucleation

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract The formation of Earth’s solid inner core marks a major transition in the thermal and chemical evolution of the deep Earth, yet its origin remains paradoxical, as initial nucleation appears to require unrealistically large undercooling in the outer core.
Jiahui Zhai, Liangrui Wei, Chen Gao, Yang Sun   +3 more
wiley   +1 more source

Assessment of the Weimer Geomagnetic Perturbation Model for High‐Latitude Positioning and Navigation

Space Weather
The Geomagnetism Group at the National Centers for Environmental Information (NCEI), in collaboration with the Cooperative Institute for Research in Environmental Sciences (CIRES), along with various government and industry partners, specializes in ...
S. Califf, M. Nair, D. Weimer, N. Zachman, B. Poedjono   +4 more
doaj   +1 more source