Results 71 to 80 of about 2,743,097 (252)

Revealing the Formation of the <20 MeV Inner Proton Radiation Belt at L ∼ 2 During the 10–11 May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract A new proton radiation belt was identified during the geomagnetic superstorm of 10–11 May 2024. To investigate its origin, we use an MHD‐test particle simulation to model solar energetic proton (SEP) trapping and the evolution of the initial trapped proton population during the storm.
Murong Qin, Mary K. Hudson, Miles Engel, Brian T. Kress, Zhao Li, Maulik Patel, Wen Li, Kevin Pham, William R. Johnston, Xinlin Li, Shawn Young   +10 more
wiley   +1 more source

First Results From Sonification and Exploratory Citizen Science of Magnetospheric ULF Waves: Long‐Lasting Decreasing‐Frequency Poloidal Field Line Resonances Following Geomagnetic Storms [PDF]

Space Weather, 2018
Magnetospheric ultralow‐frequency (ULF) waves contribute to space weather in the solar wind‐magnetosphere‐ionosphere system. The monitoring of these waves by space‐ and ground‐based instruments, however, produces big data, which are difficult to navigate,
M. Archer, M. Archer, M. Hartinger, R. Redmon, V. Angelopoulos, B. Walsh   +5 more
semanticscholar   +1 more source

Modeling ULF waves in a compressed dipole magnetic field

, 2010
This paper presents the results of a linear model for global scale magneto-hydrodynamic (MHD) waves in a compressed dipole model magnetosphere. We examine scenarios where a localized monochromatic source along the magnetopause boundary launches MHD fast ...
Kabin, Konstantin, Rankin, Robert, Rae, I. Johnathan., Fenrich, Frances R., Degeling, Alex W.   +4 more
core   +1 more source

Evolution of NWC Transmitter Wave Power Distribution From the Topside Ionosphere Into the Inner Magnetosphere

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Ground‐based very low frequency transmitters emit signals that primarily propagate within the Earth–ionosphere waveguide, and some of their energy can propagate into the magnetosphere. Ionospheric observations from the DEMETER satellite reveal a distinct concentric rings pattern of the wave power distribution of the North West Cape transmitter
Zhiyang Xia, Lunjin Chen, Richard B. Horne, Yoshizumi Miyoshi, Yoshiya Kasahara, Shoya Matsuda, Atsuki Shinbori, Tomoaki Hori, Iku Shinohara   +8 more
wiley   +1 more source

Listening to the Magnetosphere: How Best to Make ULF Waves Audible

Frontiers in Astronomy and Space Sciences, 2022
Observations across the heliosphere typically rely on in situ spacecraft observations producing time-series data. While often this data is analysed visually, it lends itself more naturally to our sense of sound.
Martin O. Archer, Marek Cottingham, Michael D. Hartinger, Xueling Shi, Xueling Shi, Shane Coyle, Ethan “Duke” Hill, Michael F. J. Fox, Emmanuel V. Masongsong   +8 more
doaj   +1 more source

Resonant ULF waves: A new interpretation

Geophysical Research Letters, 1985
Many important properties of ultra‐low frequency (ULF) magnetic pulsations (∼1 to 10 minute periods) observed in the magnetosphere and by ground‐based magnetometers have been interpreted successfully in terms of resonant field line models. These models describe the pulsations as transverse hydromagnetic waves standing on dipole flux tubes with fixed ...
Margaret G. Kivelson, David J. Southwood
openaire   +1 more source

Multisatellite studies of ULF waves

Advances in Space Research, 1988
Multisatellite studies of ULF waves are reviewed, with a special emphasis on compressional Pc 5 waves. The observations of the radial extent, azimuthal wave number and the field-aligned standing wave structure of the waves are described. When combined with plasma data, the waves appear to be consistent with drift-mirror waves originating from the ...
openaire   +1 more source

Precipitation of MeV and Sub‐MeV Electrons Due to Combined Effects of EMIC and ULF Waves

Journal of Geophysical Research: Space Physics, 2019
We explore the mechanism of MeV and sub‐MeV electron precipitations into the atmosphere in the outer radiation belt, through quasi‐linear pitch‐angle scattering by electromagnetic ion cyclotron (EMIC) waves, when strong compressional Pc4–Pc5 ultralow ...
X.‐J. Zhang, D. Mourenas, A. Artemyev, V. Angelopoulos, J. Sauvaud   +4 more
semanticscholar   +1 more source

A Case Study of Nonresonant Mode 3‐s ULF Waves Observed by MMS

Journal of Geophysical Research: Space Physics, 2020
The nature of the 3‐s ultralow frequency (ULF) wave in the Earth's foreshock region and the associated wave‐particle interaction are not yet well understood. We investigate the 3‐s ULF waves using Magnetospheric Multiscale (MMS) observations.
Shan Wang, Li‐Jen Chen, J. Ng, N. Bessho, G. Le, S. Fung, D. Gershman, B. Giles   +7 more
semanticscholar   +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