Results 71 to 80 of about 173 (148)

Propagation analysis of plasmaspheric hiss using Polar PWI measurements [PDF]

Geophysical Research Letters, 2001
We have analyzed high‐rate waveform data, taken by the POLAR Plasma Wave Instrument at high altitudes in the equatorial plasmasphere, to study plasmaspheric hiss in the range of frequencies between 100 Hz and several kHz. These emissions are found almost everywhere in the plasmasphere, and their origin is still controversial.
Santolík, O., Parrot, Michel, Storey, L., Pickett, J., Gurnett, D.   +4 more
openaire   +1 more source

The Global Propagation of Hiss Waves Originating From Dynamic Plasmaspheric Plume

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Hiss waves play a critical role in shaping Earth's radiation belts and mediating magnetosphere‐ionosphere energy transfer. Intense hiss emissions are frequently generated within dynamic plasmaspheric plumes through linear and nonlinear wave‐particle interactions.
Xiangling Ding, Zhiyong Wu, Zhaoguo He, Qi Yan, Xiangyu Chen, Jiang Yu, Yonghui Ma   +6 more
wiley   +1 more source

Nonlinear Electron Interactions With Intense VLF Waves From Transmitters

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract The impact on electron lifetimes of nonlinear interactions with the most intense very low frequency (VLF) waves from transmitters has hitherto been neglected in radiation belt codes. Here, we show the presence of a small population of intense wave packets, originating from ground‐based VLF transmitters and reaching 10 mV/m around the magnetic ...
Didier Mourenas, Xiao‐Jia Zhang, Sergei Kamaletdinov, Anton V. Artemyev, Yangyang Shen, Qianli Ma   +5 more
wiley   +1 more source

Statistical Survey of Fast Magnetosonic Waves in the L < 2 Region

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Fast magnetosonic waves are electromagnetic waves with frequencies ranging from a few Hertz to several hundred Hertz, observed primarily near the magnetic equator. Recent studies demonstrate that magnetosonic waves can propagate into the L<2 $L< 2$ region, while their distributions and propagation properties there remain unclear.
Zhijie Qin, Hui Zhu, Zhihai Ouyang, Yingying Zhao, Huicong Chen, Zhenghao She   +5 more
wiley   +1 more source

Local Generation of High‐Frequency Plasmaspheric Hiss Observed by Van Allen Probes

Geophysical Research Letters, 2019
The generation of a high‐frequency plasmaspheric hiss (HFPH) wave observed by Van Allen Probes is studied in this letter for the first time. The wave has a moderate power spectral density (∼10−6 nT2/Hz), with a frequency range extended from 2 to 10 kHz ...
Zhaoguo He, Lunjin Chen, Xu Liu, Hui Zhu, Si Liu, Zhonglei Gao, Yong Cao   +6 more
doaj   +1 more source

Periodic Response of Plasmasphere to Solar Wind High‐Speed Streams

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract We report the first observation of the plasmasphere's periodic response to solar wind high‐speed streams (HSS) during the declining phase of Solar Cycle 23, based on plasmapause location data from the IMAGE and THEMIS satellites. In both 2005 and 2008, the daily variability of the plasmapause exhibits a strong anti‐correlation with solar wind ...
Quan‐Han Li, Maosheng He, Yong‐Qiang Hao, Fei He, Xiao‐Xin Zhang   +4 more
wiley   +1 more source

Unraveling the Mystery of Earth's Space Radiation Environment Loss Processes: Meeting Report

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract On 10 June and 27 September 2024, two workshops were held at GFZ Potsdam under the umbrella of the Geo. X Research Network of Geosciences to discuss the unresolved question of the overestimation and lack of scattering of modeled ring current electrons during geomagnetic storms.
Bernhard Haas, Alexander Y. Drozdov, Jerry Goldstein, Raluca Ilie, Alwin Roy, Yangyang Shen, Katja Stoll, Ivan Vasko, Dedong Wang, Wei Wang   +9 more
wiley   +1 more source

Interpolating Electron Diffusion Coefficients in Earth's Radiation Belts: A Neural Network Model Inspired by Video Frame Interpolation

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Many numerical models have been built to uncover the physical mechanisms governing radiation belt dynamics and enable real‐time forecasting. The diffusion coefficient, as a critical input for these models, is usually obtained through linear interpolation from precomputed diffusion coefficient libraries.
Jianhang Wang, Zheng Xiang, Binbin Ni, Junhu Dong, Yangxizi Liu, Jingle Hu, Haozhi Guo, Jiakun Dai   +7 more
wiley   +1 more source

Energetic Electron Diffusion and Precipitation Driven by Ducted Hiss Waves in High Density Irregular Region

Geophysical Research Letters
Plasmaspheric hiss plays an important role in the electron precipitation and the slot formation in radiation belts. Recent studies show the whistler‐mode waves can be guided in the density irregularities, performing parallel propagation.
Bopu Feng, Haimeng Li, Rongxin Tang, Meng Zhou, Zhihai Ouyang, Zhigang Yuan, Dedong Wang, Xiongdong Yu, Ying Xiong, Zhou Chen, An Yuan, Yingqiao Cheng   +11 more
doaj   +1 more source

VLF waves from ground‐based transmitters observed by the Van Allen Probes: Statistical model and effects on plasmaspheric electrons

Geophysical Research Letters, 2017
Whistler mode very low frequency (VLF) waves from powerful ground‐based transmitters can resonantly scatter energetic plasmaspheric electrons and precipitate them into the atmosphere.
Qianli Ma, Didier Mourenas, Wen Li, Anton Artemyev, Richard M. Thorne   +4 more
doaj   +1 more source