Results 61 to 70 of about 173 (148)

Frequency‐Drifting Plasmaspheric Hiss: A Statistical Study From the Van Allen Probes Data

Geophysical Research Letters
Plasmaspheric hiss, a whistler‐mode emission confined in the high‐density plasmasphere, is of great interest to the space community attributed to its important role in inner magnetospheric dynamics.
Siyang Yi, Nigang Liu, Yi Xie, Zhaoguo He, Jiang Yu, Jun Cui   +5 more
doaj   +1 more source

Distinct Formation and Evolution Characteristics of Outer Radiation Belt Electron Butterfly Pitch Angle Distributions Observed by Van Allen Probes

Geophysical Research Letters, 2020
Using Van Allen Probes pitch angle‐resolved electron flux data, we report intriguing events of electron butterfly pitch angle distributions (PADs) at L > ~5.5 on the nightside with distinct durations, i.e., about 9 hr for the 28–29 April 2013 event and ...
Binbin Ni, Ling Yan, Song Fu, Xudong Gu, Xing Cao, Zheng Xiang, Yuannong Zhang   +6 more
doaj   +1 more source

Plasmaspheric High‐Frequency Whistlers as a Candidate Cause of Shock Aurora at Earth

Geophysical Research Letters, 2023
Auroral brightening driven by interplanetary shocks on Earth's closed magnetic field lines is commonly attributed to the 0.1–10 keV electron precipitations by electron cyclotron harmonic waves and whistler‐mode chorus waves in the low‐density region.
Nigang Liu, Zhenpeng Su, Yuyue Jin, Zhaoguo He, Jiang Yu, Kun Li, Zuzheng Chen, Jun Cui   +7 more
doaj   +1 more source

Global Morphology of Chorus Waves in the Outer Radiation Belt and the Effect of Geomagnetic Activity and fpe ${f}_{pe}$/fce ${f}_{ce}$

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract Whistler‐mode chorus waves play a key role in driving radiation belt dynamics by enabling both acceleration of electrons to relativistic energies as well as their loss into the atmosphere via pitch‐angle scattering. The ratio between the electron plasma frequency (fpe ${f}_{pe}$) and the electron gyrofrequency (fce ${f}_{ce}$) significantly ...
K. A. Bunting, N. P. Meredith, J. Bortnik, Q. Ma, R. Matsuura, X.‐C. Shen   +5 more
wiley   +1 more source

Dependence of Plasmaspheric Hiss Power on ωpe/Ωce

Geophysical Research Letters
Plasmaspheric hiss waves play a key role in scattering energetic electrons and are often modeled in the inner magnetosphere using empirical hiss power maps parameterized by L shell.
Mingyue Lu, Hui Zhu, Yingying Zhao, Huicong Chen, Zhijie Qin, Zhenghao She   +5 more
doaj   +1 more source

Nightside Plasmaspheric Plume‐To‐Core Migration of Whistler‐Mode Hiss Waves

Geophysical Research Letters, 2022
AbstractWhistler‐mode hiss waves play an important role in the radiation belt electron depletion. Whether the hiss waves with significant differences in amplitude and propagation direction within the plasmaspheric core and plume are related to each other remains unclear.
Zhiyong Wu, Zhenpeng Su, Jerry Goldstein, Nigang Liu, Zhaoguo He, Huinan Zheng, Yuming Wang   +6 more
openaire   +1 more source

Multi‐Species Energy‐Banded Ions in the Ionosphere During the 21 January 2005 Magnetic Storm: Low‐Altitude Edge of the Warm Plasma Cloak

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract During the 21–22 January 2005 magnetic storm, the FAST satellite observed warm (< few keV) ions in discrete energy bands on the dayside at ∼3,000 km altitude for more than 6.5 hr. We suggest that the ionospheric energy‐banded ions represent the low‐altitude edge of the warm plasma cloak observed simultaneously by magnetospheric satellites ...
J. U. Kozyra, M. W. Liemohn, C. A. Cattell, J. Dombeck, C. P. Escoubet, M. Thomsen, G. Lu, D. J. Knipp, L. J. Paxton, R. M. Skoug, H. A. Elliott, A. J. Davis, L. Rastaetter, D. DeZeeuw, C. Colpitts   +14 more
wiley   +1 more source

Enhanced Radiation Exposure of Airline Crew and Passengers During the May 2024 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Enhanced radiation at aviation altitudes is a concern for flight crew and passengers. During space weather events, solar flares and coronal mass ejection (CME) driven shocks are sources of energetic particles that can reach Earth's near‐space environment and interact with its magnetic field and atmosphere.
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Benjamin Hogan, Rashmi Siddalingappa, Harshitha Challa   +6 more
wiley   +1 more source

Electron Scattering by Plasmaspheric Hiss in a Nightside Plume [PDF]

Geophysical Research Letters, 2018
AbstractPlasmaspheric hiss is known to play an important role in radiation belt electron dynamics in high plasma density regions. We present observations of two crossings of a plasmaspheric plume by the Van Allen Probes on 26 December 2012, which occurred unusually at the post‐midnight‐to‐dawn sector between L ~ 4–6 during a geomagnetically quiet ...
Wenxun Zhang, Song Fu, Xudong Gu, Binbin Ni, Zheng Xiang, Danny Summers, Zhengyang Zou, Xing Cao, Yuequn Lou, Man Hua   +9 more
openaire   +1 more source

Outer Radiation Belt Dynamics During the October 2012 Storm Revisited: Rapid Inward Radial Transport From a Dynamic Outer Boundary

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Earth's outer radiation belt electron flux is highly variable and can be enhanced by over an order of magnitude over timescales less than one day, as observed during the October 2012 storm. Previous studies of this storm (e.g., Reeves et al., 2013, https://doi.org/10.1126/science.1237743) have invoked local acceleration to explain this ...
L. G. Ozeke, I. R. Mann, L. Olifer, S. K. Morley, H. E. Spence   +4 more
wiley   +1 more source