Results 121 to 130 of about 19,448,839 (267)

A Recursive Truncated Taylor Expansion Downward Continuation Method for Geomagnetic Field

Applied Sciences
In aeromagnetic detection and geomagnetic navigation, the reference geomagnetic maps usually need to be continued to different altitudes. Traditionally, the geomagnetic field upward continuation is stable.
Ke Wan, Haibin Li, Xu Liu, Zhongyan Liu, Yujing Xu, Yujie Xiang, Zengquan Ding, Weiji Dai, Xinrong He, Qi Zhang   +9 more
doaj   +1 more source

Global Three‐Dimensional Simulation of Magnetospheric Dynamics During the Extreme Geomagnetic Storm of 10–11 May 2024

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study presents a high‐resolution three‐dimensional global magnetohydrodynamic (MHD) simulation of the historic geomagnetic storm of 10–11 May 2024, using observational data for the ACE solar wind input. This extreme event was characterized by intense solar wind dynamic pressure (∼50 nPa) and exceptionally strong interplanetary magnetic ...
Kyung Sun Park
wiley   +1 more source

Geomagnetic jerks as chaotic fluctuations of the Earth’s magnetic field

, 2013
The geomagnetic field is chaotic and can be characterized by a mean exponential time scaleafter which it is no longer predictable. It is also ergodic, so time analyses can substitute the more difficult phase space analyses.
Mandea, M., Simonyan, A., Qamili, E., De Santis, A., Isac, A., Duka, B.   +5 more
core   +1 more source

Earthward O+ Injections in the Plasma Sheet Boundary Layer During Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract During geomagnetic storms, energetic ions are injected from the Earth's magnetotail along the plasma sheet boundary layer (PSBL). Owing to its off‐equatorial inclined orbit, the Arase satellite is in a prime position to observe these injections in the PSBL on the nightside at the apogee.
M. M. H. Kalliokoski, L. M. Kistler, K. Asamura, S. Kasahara, Y. Miyoshi, K. Keika, T. Hori, A. Matsuoka, K. Yamamoto, J. Liao   +9 more
wiley   +1 more source

Coupled Thermosphere–Ionosphere Dynamics During the 17 January 2013 Storm: GITM–TIDAS Comparison With Millstone Hill ISR Measurements

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This article analyzes a weak geomagnetic storm on January 17–18, 2013, using a first‐principles model (Global Ionosphere Thermosphere Model (GITM) with an empirical assimilative ionospheric model (TIDAS), evaluated against observations in the form of Millstone Hill (MH) incoherent scatter radar (ISR) altitude profiles and global navigation ...
Onyinye Nwankwo‐Omoloja, Aaron J. Ridley, Shun‐Rong Zhang, Philip J. Erickson   +3 more
wiley   +1 more source

Modeling of High-Precision Sea Surface Geomagnetic Field in the Northern South China Sea Based on PSO-BP Neural Network

Journal of Marine Science and Engineering
In existing regional geomagnetic field modeling, the smoothness of basic functions and the insufficient data constraints in marginal regions lead to the omission of detail features and extrapolation oscillations.
Hongjie Chen, Guiqian Wu, Haopeng Chen, Chuang Xu, Chunhong Wu   +4 more
doaj   +1 more source

Modeling regionally the geomagnetic field

, 2003
The geomagnetic field above the Earth's surface in current free region may be expressed as the gradient of a scalar potential solving Laplace equation. For regions with a fairly dense coverage of data at different altitudes, a regional model ought to offer a better spatial resolution of the regional field over the volume under study than a global field
openaire   +1 more source

On regional modelling of the main geomagnetic field [PDF]

Geofizika, 2007
In this study I applied Spherical Cap Harmonic Analyses, SCHA, with physical regularization (Korte and Holme, 2003) to synthetic series obtained from the Comprehensive model CM4 (Sabaka et al., 2004), at 46 European observatory locations and additionally 11 'virtual observatories' chosen to improve the initial data distribution. The main purpose was to
openaire   +1 more source

Kelvin–Helmholtz Spectral Redistribution by Flow and Density Structure at the Dusk Dayside Magnetopause

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract We study the development of the Kelvin‐Helmholtz instability (KHI) along the dusk dayside Earth's magnetopause with and without the presence of enhanced plasma density at the shear interface. Using three‐dimensional MAGE global simulations, we establish general KHI growth rate diagrams, which depend sensitively on the transverse profiles of ...
G. Peyrichon, J.‐F. Ripoll, H. El‐Rabii, A. T. Michael, V. G. Merkin, M. Cosmides, K. Sorathia, F. R. Toffoletto, A. Y. Ukhorskiy   +8 more
wiley   +1 more source

A study of Geomagnetic Field and It's secular variation at the Location Brazilian Anomaly (25°S, 45°W).

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
ln this paper we study  and  analysis  the  total intensity  (P) .and the horizontal  component (H) of the geomagnetic field at the location na ly Brazilian    Anomaly  (Lat   25S,    long   4S·"W)    in  which   the geomagnetic field intensity  has a ...
H.A. AI-Mahdi, A.F. Mokheber
doaj