Results 41 to 50 of about 18,719 (213)
Geophysical Research Letters, 2021 Collisionless shocks can be nonstationary with periodic reformation shown in many simulation results, but direct observations are still tenuous and difficult to conclusively interpret. In this study, using Magnetospheric Multiscale (MMS) observations, we
Terry Z. Liu +4 more
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ULF waves and transients in the topside ionosphere [PDF]
, 2015 We review new physical results about various types of ULF waves (Pc3, Pi1-2, Pc1-2) in the topside ionosphere stemming from low-orbiting satellite observations. Pc3 and Pi2 waves were detected clearly in the compressional component, whereas on the ground
Heilig, Balázs, Pilipenko, Viacheslav
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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
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Multiradar observations of substorm‐driven ULF waves [PDF]
Journal of Geophysical Research: Space Physics, 2016 AbstractA recent statistical study of ULF waves driven by substorm‐injected particles observed using Super Dual Auroral Radar Network (SuperDARN) found that the phase characteristics of these waves varied depending on where the wave was observed relative to the substorm. Typically, positive azimuthal wave numbers, m, were observed in waves generated to
James, Matthew K. +3 more
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UniverseThis review examines ultra-low frequency (ULF) waves across different planetary environments, focusing on Earth, Mercury, and Saturn. Data from spacecraft missions (CHAMP, Swarm, and Oersted for Earth; MESSENGER for Mercury; and Cassini for Saturn ...
Zsofia Bebesi +4 more
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Numerical study of the generation and propagation of ultralow-frequency waves by artificial ionospheric F region modulation at different latitudes [PDF]
Annales Geophysicae, 2016 Powerful high-frequency (HF) radio waves can be used to efficiently modify the upper-ionospheric plasmas of the F region. The pressure gradient induced by modulated electron heating at ultralow-frequency (ULF) drives a local oscillating diamagnetic ...
X. Xu +5 more
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Deciphering satellite observations of compressional ULF waveguide modes [PDF]
, 2016 T. Elsden would like to thank STFC for financial support for a doctoral training grant, number AMC3 STFC12. A.N. Wright was supported by STFC grant ST/N000609/1.We present an analytical method for determining incident and reflection co- efficients for ...
Elsden, Tom +2 more
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Van Allen Probes, THEMIS, GOES, and Cluster Observations of EMIC waves, ULF pulsations, and an electron flux dropout [PDF]
, 2016 We examined an electron flux dropout during the 12-14 November 2012 geomagnetic storm using observations from seven spacecraft: the two Van Allen Probes, Time History of Events and Macroscale Interactions during Substorms (THEMIS)-A (P5), Cluster 2, and ...
Baker, DN +11 more
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Frequency‐Dependent Responses of Plasmaspheric Hiss to the Impact of an Interplanetary Shock
Geophysical Research Letters, 2021 Plasmaspheric hiss waves are essential for the pitch‐angle scattering and precipitation of energetic electrons and interplanetary shocks may affect these waves.
Haobo Fu +6 more
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Solar-Terrestrial Physics, 2022 The review considers the current state of the theory of short-period ULF waves in plasma with admixture of heavy ions (ions whose mass significantly exceeds the mass of protons).
O.S. Mikhailova +2 more
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