Results 131 to 140 of about 19,448,839 (267)

Geomagnetic field modelling and USTHB IGRF-14 candidates

Earth, Planets and Space
The present paper describes the construction of a global spherical harmonic model of the geomagnetic field, developed as the USTHB (University of Science and Technology Houari Boumediene) candidate for the 14th generation of International Geomagnetic ...
Abdenaceur Lemgharbi, M. Hamoudi, V. Lesur, M. Mandea, T. Amezza, A. Abtout   +5 more
doaj   +1 more source

Mathematical Model of the Geomagnetic Field

, 2006
First comes a description of a mathematical model of the geomagnetic field. Then some discussion of the classical non-uniqueness results of Backus. Further we look at more recent results concerning reconstruction of the geomagnetic field from intensity and the normal component of the field. New stability estimate for this reconstruction is obtained.
openaire   +1 more source

A Hierarchical Bayesian Model for the Global Holocene Geomagnetic Field

Journal of Geophysical Research: Solid Earth
Abstract We present a hierarchical Bayesian model of the global geomagnetic field for the last 8,000 years. The model is built solely with thermoremanent records, which include archeomagnetic and volcanic data. Building upon previous work, this model includes fewer approximations and treats model hyperparameters as probabilistic ...
Maximilian Arthus Schanner, Sanja Panovska, Monika Korte   +2 more
openaire   +2 more sources

Characterization of High‐Frequency GNSS Total Electron Content Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Global Navigation Satellite System (GNSS)–derived Total Electron Content (TEC) is widely used to investigate ionospheric variability, but has primarily been applied to low‐frequency fluctuations. Here we present a long‐term statistical characterization of high‐frequency (30–500 mHz) TEC variations using multi‐constellation GNSS data from 11 ...
J. Pérez‐Coll Jiménez, N. Ivchenko, N. Partamies, M. Håkansson   +3 more
wiley   +1 more source

Spatial Relationship Between the Midlatitude Ionospheric Trough and Plasmaspheric Plumes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The plasmasphere, a subsystem of the complex geospace environment, is a torus of cold plasma “frozen” into Earth's magnetic field and sourced from the ionosphere. Plasmaspheric plumes–drainage channels formed during geospace storms–have primarily been observed near the equator.
Balázs Heilig, Lilla Murár‐Juhász, Máté Tomasik   +2 more
wiley   +1 more source

Statistics of Orientation of Nightside Auroral Arcs and Interplanetary Conditions

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract We present statistics and dependence on interplanetary conditions of the orientation of nightside auroral arcs in the equatorward part of the auroral oval. The results related to the arcs essentially represent the orientation and dynamics of the equatorial boundary of the nightside auroral oval.
A. Kozlovsky, M. Myllymaa, R. Lukianova, T. Raita   +3 more
wiley   +1 more source

Advancements in low Earth orbit satellite magnetic field measurements and global geomagnetic field modeling

地球与行星物理论评
Low Earth orbit (LEO) satellites have emerged as a primary tool for global geomagnetic field detection and model refinement, owing to their wide coverage, high resolution, and absence of geographical limitations.
Yanyan Yang, Jie Wang, Zhima Zeren, Xuhui Shen, Bin Zhou, Shigeng Yuan, Yuanqing Miao, Yue Xu   +7 more
doaj   +1 more source

Faint Diffuse 557.7‐nm Emissions Equatorward of the Auroral Oval: Conjugate Observations by Ground Airglow Imagers and the Arase Satellite

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract At subauroral latitudes, discrete auroras, such as strong thermal emission velocity enhancement and stable auroral red arcs, have been extensively studied. On the other hand, diffuse emissions at subauroral latitudes have not been studied well.
M. Gomi, K. Shiokawa, Y. Miyoshi, Y. Otsuka, S. Oyama, M. Connors, A. Shinbori, T. Hori, C.‐W. Jun, K. Yamamoto, I. Shinohara, K. Asamura, S. Kasahara, K. Keika, S. Yokota, F. Tsuchiya, A. Kumamoto, Y. Kasahara, S. Matsuda, Y. Kazama, S.‐Y. Wang, S. W. Y. Tam, T.‐F. Chang, B.‐J. Wang, A. Matsuoka, M. Teramoto   +25 more
wiley   +1 more source

Propagation Dynamics of Fast Electron Beam and Its Electron Cyclotron Maser Emission

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Fast electron beams (FEBs) and coherent radio bursts both are very common plasma activity phenomena in the cosmos. The electron cyclotron maser (ECM) instability driven by FEBs trapped in magnetic fields can directly amplify radio wave radiations.
Ling Chen, Dejin Wu, Jianfei Tang, Guoqing Zhao   +3 more
wiley   +1 more source

Convection Velocity Covariance Estimated From SuperDARN Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract An examination of the spatial covariance of the high‐latitude plasma convection velocity is presented. The covariance was calculated from patterns of plasma convection estimated from Super Dual Auroral Radar Network observations. The convection patterns were calculated on a magnetic latitude—magnetic local time grid from 55° ${}^{\circ}$ to 88.
W. A. Bristow, M. F. Wilcox
wiley   +1 more source