Results 51 to 60 of about 2,907 (207)

Global estimates of plasmaspheric losses during moderate disturbance intervals [PDF]

Annales Geophysicae, 2010
For a set of five moderate disturbance events, we calculate the total number of He+ ions removed the plasmasphere using calibrated global EUV images.
M. Spasojevic, M. Spasojevic, B. R. Sandel   +2 more
doaj   +1 more source

Global Effects of Chorus and Hiss Waves on Trapped Energetic Electrons at Jupiter

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Unlike Earth, where whistler‐mode chorus is generally observed outside the plasmasphere and hiss is predominantly confined within it, Jupiter's magnetosphere frequently hosts both wave modes simultaneously. Using Juno observations, we present a global survey of whistler‐mode waves at Jupiter, demonstrating that both chorus and hiss are ...
W. Li, Q. Ma, W. S. Kurth, G. B. Hospodarsky, S. J. Bolton   +4 more
wiley   +1 more source

Spatio-temporal structure of a poloidal Alfvén wave detected by Cluster adjacent to the dayside plasmapause [PDF]

Annales Geophysicae, 2008
A case study of a poloidal ULF pulsation near the dayside plasmapause is presented based on Cluster observations of magnetic and electric fields. The pulsation is detected close to the magnetic equatorial plane at L shells L=[4.4, 4.6] and oscillates
S. Schäfer, K. H. Glassmeier, P. T. I. Eriksson, P. N. Mager, V. Pierrard, K. H. Fornaçon, L. G. Blomberg   +6 more
doaj   +1 more source

Hiss Wave Evolution During Substorms Based on Van Allen Probes Observations

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Hiss waves frequently occur in the plasmasphere or plumes, playing a key role in energetic electron loss in the Earth's inner magnetosphere. While previous studies have linked hiss wave enhancements in the outer plasmasphere (just inside the plasmapause) to electron injections during substorms, their evolution across various substorm phases ...
Xiao‐Chen Shen, Wen Li, Qianli Ma, Nigel P. Meredith, Xiangning Chu, Murong Qin, Luisa Capannolo, Sheng Huang   +7 more
wiley   +1 more source

Plasmapause undulation of 17 April 2002

Geophysical Research Letters, 2004
We report IMAGE EUV observations of a striking undulatory motion of the plasmapause that occurred on 17 April 2002, in which a large ripple propagated westward across the duskside plasmapause. From the plasmapause motion we infer a peak E‐field of ≈3 mV/m associated with the undulation, and estimate the undulation's equatorial azimuthal speed to be 0.9
J. Goldstein, B. R. Sandel, M. R. Hairston, S. B. Mende   +3 more
openaire   +1 more source

Abrupt Disappearance of Plasmaspheric Hiss Inside the Magnetic Dip

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Plasmaspheric hiss plays an important role in radiation belt electron dynamics, and its excitation and propagation have long attracted attention. During a substorm, Van Allen Probe B observed the disappearance of plasmaspheric hiss at the magnetic dip, which was driven by the injection of energetic protons.
Yan Zhuang, Chao Yue, Shan Wang, Haimeng Li, Sibo Xu, Xu‐Zhi Zhou, Qiu‐Gang Zong   +6 more
wiley   +1 more source

Whistler‐Mode Waves in the Density Double Ducts

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract We report the recent observation of a density duct structure in the equatorial plasmasphere, identified using data from the NASA Van Allen Probes (RBSP). The structure consists of a low‐density duct located above a high‐density duct, forming a “double duct” system capable of simultaneously trapping and guiding multiple whistler‐mode waves at ...
Salman A. Nejad, Anatoly V. Streltsov
wiley   +1 more source

A very bright SAR arc: implications for extreme magnetosphere-ionosphere coupling [PDF]

Annales Geophysicae, 2007
In contrast to the polar aurora visible during geomagnetic storms, stable auroral red (SAR) arcs offer a sub-visual manifestation of direct magnetosphere-ionosphere (M-I) coupling at midlatitudes.
J. Baumgardner, J. Wroten, J. Semeter, J. Kozyra, M. Buonsanto, P. Erickson, M. Mendillo   +6 more
doaj   +1 more source

A Neural Network Model of Equatorial Electric Field Structures in the Inner Magnetosphere

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Enabled by state‐of‐the‐art electric field measurements from the Van Allen Probes and careful calibration of the high‐quality data, we developed the first machine‐learning based inner‐magnetosphere electric field model, which covers L = 2.5–6.0 within 20° ${}^{\circ}$ around the magnetic equator.
M. Hua, S. Tian, J. Bortnik, D. Ma, Y. Wang, L. R. Lyons, J. R. Wygant   +6 more
wiley   +1 more source

The electron density at the midpoint of the plasmapause

Frontiers in Astronomy and Space Sciences
The high density plasmasphere in the magnetosphere is often separated from a lower density region outside of the plasmasphere, called the plasmatrough, by a sharp gradient in electron density called the plasmapause.
Richard E. Denton, Phoebe M. Tengdin, Phoebe M. Tengdin, David P. Hartley, Jerry Goldstein, Jinmyoung Lee, Kazue Takahashi   +6 more
doaj   +1 more source