Results 11 to 20 of about 1,626 (204)

Plasmapause surface wave oscillates the magnetosphere and diffuse aurora [PDF]

Nature Communications, 2020
Theoretical studies suggested that plasmapause surface waves related to the sharp inhomogeneity exist and act as a source of geomagnetic pulsations.
Fei He, Rui-Long Guo, William R. Dunn, Zhong-Hua Yao, Hua-Sen Zhang, Yi-Xin Hao, Quan-Qi Shi, Zhao-Jin Rong, Jiang Liu, An-Min Tian, Xiao-Xin Zhang, Yong Wei, Yong-Liang Zhang, Qiu-Gang Zong, Zu-Yin Pu, Wei-Xing Wan   +15 more
doaj   +6 more sources

Prediction of Dynamic Plasmapause Location Using a Neural Network

Space Weather, 2021
As a common boundary layer that distinctly separates the regions of high‐density plasmasphere and low‐density plasmatrough, the plasmapause is essential to comprehend the dynamics and variability of the inner magnetosphere.
Deyu Guo, Song Fu, Zheng Xiang, Binbin Ni, Yingjie Guo, Minghang Feng, Jianguang Guo, Zejun Hu, Xudong Gu, Jianan Zhu, Xing Cao, Qi Wang   +11 more
doaj   +2 more sources

Pre‐Existing Plasmaspheric Density Structure

Geophysical Research Letters
We perform a basic model experiment: we run two nearly identical plasmapause simulations, differing only by their initial conditions. The first run contains initial fine‐scale and mesoscale structure, and the second run is initialized with a featureless,
J. Goldstein, M. F. Thomsen
doaj   +2 more sources

Time-dependent plasmapause motion [PDF]

Journal of Geophysical Research, 1971
Time dependent plasmapause motion after increase and decrease in magnetic activity based on analytical model of plasma ...
Grebowsky, J. M.
openaire   +3 more sources

Occurrence of periodic plasmapause oscillations in response to a record-breaking superstorm

Geoscience Letters
The plasmapause boundary can efficiently modulate magnetosphere-ionosphere coupling. During typical geomagnetic storms, the eroded plasmapause displays periodic oscillations that manifest as giant undulations of the aurora in the ionosphere.
Yi-Jia Zhou, Quan-Qi Shi, Jian Liu, Fei He, Jih-Hong Shue, A. W. Degeling, Yoshizumi Miyoshi, Shi-Chen Bai, Qiu-Gang Zong, Yong-Liang Zhang, Michel Blanc, Chaozhou Mou, Zu-Yin Pu, Yoshiya Kasahara, Atsuki Shinbori, Fuminori Tsuchiya, Kazuhiro Yamamoto, Ayako Matsuoka   +17 more
doaj   +2 more sources

Dynamical Simulations of Plasmapause Deformations [PDF]

Space Science Reviews, 2006
Dynamical simulations have been developed at IASB-BIRA to model the deformations of the plasmasphere during geomagnetic substorms and other variations in the level of geomagnetic activity. The simulations are based on the mechanism of plasma instability and use the empirical Kp-dependent electric field E5D.
Viviane Pierrard, Juan Cabrera
core   +3 more sources

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   +2 more sources

Monitoring the plasmapause using geomagnetic field line resonances [PDF]

, 2004
This paper discusses the use of ground magnetometer data to derive plasma mass density profiles of the dayside plasmapause region with spatial and temporal resolution in the range 0.15-0.4 R-E and 20-60 min.
Menk, F.W., Mann, I.R., Waters, C.L., Clilverd, M.A., Smith, A.J., Milling, D.K.   +5 more
core   +6 more sources

Observational Evidence for Whistler Mode Waves Guided/Ducted by the Inner and Outer Edges of the Plasmapause

Geophysical Research Letters, 2021
We present observational support for whistler mode waves guidance by the plasmapause gradients based on a case study and statistical analyses. Due to the combined effects of inhomogeneous magnetic fields and plasma densities, whistler mode waves near the
Rui Chen, Xinliang Gao, Quanming Lu, Bruce T. Tsurutani, Shui Wang   +4 more
doaj   +1 more source

On structuring of the plasmapause [PDF]

Geophysical Research Letters, 2012
Irregularities have been observed on the plasmapause by radio wave techniques and by in situ density, electric field, and magnetic field measurements. We review these data sets and show that Alfvén waves are present and could lead to the observed fluctuations through mixing of the gradient in plasma density at the plasmapause.
M. C. Kelley, J. Franz, A. Jacobson
openaire   +1 more source