Results 71 to 80 of about 18,719 (213)

Application of Singular Spectrum Analysis (SSA) for Delineating Geomagnetic and Lithospheric Signatures Associated With M7.6 Japan Earthquake

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract In this paper, Singular Spectral Analysis (SSA) is applied to the geomagnetic field to delineate signatures from different sources, such as geomagnetic variability and lithospheric processes. We performed SSA on the Y component of the Swarm satellite magnetic field By during the period from September 2023 to January 2024. Eigen values obtained
Amrita Yadav, Jayashree Bulusu, Essam Ghamry, Dedalo Marchetti, A. P. Dimri   +4 more
wiley   +1 more source

Magnetospheric responses to solar wind Pc5 density fluctuations: Results from 2D hybrid Vlasov simulation

Frontiers in Astronomy and Space Sciences, 2022
Ultra-low frequency (ULF) waves are routinely observed in Earth’s dayside magnetosphere. Here we investigate the influence of externally-driven density variations in the near-Earth space in the ULF regime using global 2D simulations performed with the ...
Hongyang Zhou, Lucile Turc, Yann Pfau-Kempf, Markus Battarbee, Vertti Tarvus, Maxime Dubart, Harriet George, Giulia Cozzani, Maxime Grandin, Urs Ganse, Markku Alho, Andreas Johlander, Jonas Suni, Maarja Bussov, Konstantinos Papadakis, Konstantinos Horaites, Ivan Zaitsev, Fasil Tesema, Evgeny Gordeev, Minna Palmroth , Minna Palmroth    +20 more
doaj   +1 more source

Phase‐Space Synchronization Driven by Moon‐Magnetosphere Coupling in Gas Giants

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We present a new theoretical framework to describe the rapid and spatially localized loss of energetic particles in planetary radiation belts, focusing on interactions between gas giant magnetospheres and their moons. Observations show that flux depletions—known as microsignatures—often refill on timescales comparable to a single drift period,
Adnane Osmane, Elias Roussos, Peter Kollmann   +2 more
wiley   +1 more source

Formation of a magnetic duct by the compressional component of ULF oscillation: a ray tracing study of whistler-mode wave propagation

Earth, Planets and Space
We investigate the propagation of whistler-mode waves in ultralow frequency (ULF) wave-derived magnetic ducts using ray tracing simulations in a two-dimensional dipole coordinate system on the meridian plane. The refractive index modulation caused by the
Kohki Tachi, Yuto Katoh
doaj   +1 more source

Saturn's ULF wave foreshock boundary: Cassini observations [PDF]

Planetary and Space Science, 2013
Even though the solar wind is highly supersonic, intense ultra-low frequency (ULF) wave activity has been detected in regions just upstream of the bow shocks of magnetized planets. This feature was first observed ahead of the Earth's bow shock, and the corresponding region was called the ULF wave foreshock, which is embedded within the planet's ...
Andrés, Nahuel, Gomez, Daniel Osvaldo, Bertucci, Cesar, Mazelle, C., Dougherty, M.   +4 more
openaire   +3 more sources

Periodic Density Structures Observed in Ulysses Data: First Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol, Nicholeen Viall, Larry Kepko, Simone Di Matteo   +3 more
wiley   +1 more source

Simultaneous Observations of Electron Phase Space Density Variations in the Geostationary Orbit by GK2A, GOES‐16, and GOES‐17

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract This study presents simultaneous measurements of electron phase space density (PSD) gradients in geostationary orbit using data from GK2A, GOES‐16, and GOES‐17. By leveraging a three‐satellite configuration, we provide statistical results of PSD gradient estimation in invariant coordinates.
N.‐Y. Lee, J. Seon, G. W. Na, C.‐H. Lee, W.‐H. Seol, K.‐C. Kim   +5 more
wiley   +1 more source

Chiral unitary meson-baryon dynamics in the presence of resonances: Elastic pion-nucleon scattering [PDF]

, 1999
We develop a novel approach to chiral meson-baryon dynamics incorporating unitarity constraints and explicit resonance fields. It is based on the most general structure of any pion-nucleon partial wave amplitude neglecting the unphysical cuts as derived ...
Meißner, Ulf-G., Oller, J. A.
core   +2 more sources

Extending the Wave Telescope Technique to Larger Numbers of Spacecraft Obtaining Robust Spatial Power Spectra

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract The wave telescope is an analysis technique for multi‐point spacecraft data that estimates power spectra in reciprocal position space (k $k$‐space). It has been used to reveal the spatial properties of waves and fluctuations in space plasmas. Originally designed as an analysis tool for 4 spacecraft constellations, new multi‐scale missions such
L. Schulz, K.‐H. Glassmeier, L. Turc, F. Plaschke, K. G. Klein, M. Palmroth, O. W. Roberts, Y. Narita   +7 more
wiley   +1 more source

SPECTRAL ANALYSIS OF REFERENCE SIGNAL AND OF HF SIGNAL REFLECTED FROM THE IONOSPHERE BEATS

Radio Physics and Radio Astronomy, 2014
Topicality of this work is due to the necessity of studying the physical effects associated with the processes in the magnetosphere and the ionosphere. The HF Doppler radar of vertical sounding is used for observations.
V. F. Pushin, L. F. Chernogor
doaj   +1 more source