Results 151 to 160 of about 60,199 (278)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract A moderate geomagnetic storm was driven by high‐speed solar wind stream on 14 March 2016. We show that large‐scale traveling ionospheric disturbances (LSTIDs) played a significant role in producing the ionospheric storm positive phase at mid‐latitudes in the North American sector.
G. P. Geethakumari +8 more
wiley +1 more source
Back-Reaction of Cosmological Perturbations in the Infinite Wavelength Approximation [PDF]
, 2004 Robert Brandenberger, C. S. Lam
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Cosmological Perturbation Theory
, 2013 Lecture notes from the Mangaratiba cosmology school, August 2012. To appear in the proceedings (S. Perez Bergliaffa and M. Novello, Eds., 2013)
openaire +2 more sources
Statistical Auroral Absorption Model Parameterized by AE Index
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract Energetic electron precipitation, often in association with enhanced geomagnetic activity, leads to increased D‐region ionization in the auroral region causing auroral absorption. A statistical auroral absorption model is presented for high‐latitudes (poleward of 50° magnetic latitude) based on data collected from 2010 to 2019 from 13 wide ...
R. A. D. Fiori +4 more
wiley +1 more source
Stability of the de-Sitter spacetime. The anisotropic case
Physics Letters BWe elaborate on the cosmological implications of the recently established non-perturbative O(D,D)-symmetric approach. Following the α′-complete Friedmann equations, we provide a qualitative description of the dynamics of anisotropy perturbations. We find
Przemysław Bieniek +3 more
doaj +1 more source
Global MHD Simulations: Magnetosphere–Ionosphere Coupling Dependence on Conductance Model
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract Eighty‐five geomagnetic storms were simulated with the space weather modeling framework Geospace model using two different ionospheric conductance models. One set used the legacy conductances within the Ridley ionosphere model, while the other set used the newly developed conductance model for extreme events conductance model.
T. I. Pulkkinen +9 more
wiley +1 more source
Oscillating gravitational potential in cosmological scalar field perturbation. [PDF]
, 2021 Jai-chan Hwang, Hyerim Noh
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract The Geospace Dynamics Constellation (GDC) mission aims to investigate the dynamic coupling between the magnetosphere, ionosphere, and thermosphere by resolving key spatiotemporal processes at scales ranging from local to global. A key aspect is GDC's ability to reconstruct hemispheric‐scale high‐latitude electrodynamics with comprehensive ...
J. S. Shim +6 more
wiley +1 more source
Cosmological perturbation theory
, 2004 This is a review on cosmological perturbation theory. After an introduction, it presents the problem of gauge transformation. Gauge invariant variables are introduced and the Einstein and conservation equations are written in terms of these variables. Some examples, especially perfect fluids and scalar fields are presented in detail.
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Assessment of the Generation of Traveling Ionospheric Disturbances by Solar Terminators
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract The generation of traveling ionospheric disturbances (TIDs) near solar terminators has been predicted, and several studies have reported the detection of TIDs associated with sunrise. However, there are also observations that do not show TID signatures at sunrise.
Hyosub Kil +5 more
wiley +1 more source