Results 61 to 70 of about 960 (194)

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

Enhanced Radiation Levels at Aviation Altitudes and Their Relationship to Plasma Waves in the Inner Magnetosphere

Space Weather, 2023
It is believed that galactic cosmic rays and solar energetic particles are the two major sources of ionizing radiation. However, the radiation source may also be due to relativistic electrons that are associated with precipitation from the Van Allen ...
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Rashmi Siddalingappa   +4 more
doaj   +1 more source

Statistically measuring the amount of pitch angle scattering that energetic electrons undergo as they drift across the plasmaspheric drainage plume at geosynchronous orbit [PDF]

, 2014
Using five spacecraft in geosynchronous orbit, plasmaspheric drainage plumes are located in the dayside magnetosphere and the measured pitch angle anisotropies of radiation belt electrons are compared duskward and dawnward of the plumes.
Borovsky, Joseph E., Denton, Michael H., Friedel, Reiner H. W.   +2 more
core   +1 more source

Particle Simulation of the Generation of Plasmaspheric Hiss

Journal of Geophysical Research: Space Physics, 2020
AbstractWe have conducted a one‐dimensional electromagnetic particle simulation with a parabolic magnetic field to reproduce whistler‐mode hiss emissions in the plasmasphere. We assume a bi‐Maxwellian distribution with temperature anisotropy for energetic electrons injected into the plasmasphere and find that hiss emissions are generated with spectrum ...
Mitsuru Hikishima, Yoshiharu Omura, Danny Summers   +2 more
openaire   +1 more source

Statistical Properties of Plasmaspheric Hiss From Van Allen Probes Observations [PDF]

Journal of Geophysical Research: Space Physics, 2018
AbstractVan Allen Probes observations are used to statistically investigate plasmaspheric hiss wave properties. This analysis shows that the wave normal direction of plasmaspheric hiss is predominantly field aligned at larger L shells, with a bimodal distribution, consisting of a near‐field aligned and a highly oblique component, becoming apparent at ...
D. P. Hartley, C. A. Kletzing, O. Santolík, L. Chen, R. B. Horne   +4 more
openaire   +2 more sources

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

Cross Correlation Between Plasmaspheric Hiss Waves and Enhanced Radiation Levels at Aviation Altitudes

Space Weather
Enhanced radiation in the Earth's atmosphere can pose serious hazards to pilots, aircraft passengers, and commercial space travelers. Recent results have shown, statistically, that there is a strong correlation between dose rates observed by Automated ...
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Rashmi Siddalingappa, Benjamin Hogan   +5 more
doaj   +1 more source

Radial diffusion simulations of the 20 September 2007 radiation belt dropout [PDF]

Annales Geophysicae, 2014
This is a study of a dropout of radiation belt electrons, associated with an isolated solar wind density pulse on 20 September 2007, as seen by the solid-state telescopes (SST) detectors on THEMIS (Time History of Events and Macroscale Interactions ...
J. Albert
doaj   +1 more source

Electron losses from the radiation belts caused by EMIC waves [PDF]

, 2014
Electromagnetic Ion Cyclotron (EMIC) waves cause electron loss in the radiation belts by resonating with high energy electrons at energies greater than about 500 keV. However, their effectiveness has not been fully quantified.
Fraser, Brian J,, Glauert, Sarah A., Grew, Russell S., Horne, Richard B., Kersten, Tobias, Meredith, Nigel P.   +5 more
core   +1 more source

Statistical Relationship Between Exohiss Waves and Plasmaspheric Hiss

Geophysical Research Letters, 2020
AbstractBased on the Van Allen Probe A observations from 2013 to 2015, we show the statistical relationship between exohiss waves and plasmaspheric hiss. Both hiss and exohiss waves have higher occurrence rates on the dayside (MLT = 8–20) and are positively correlated.
J. L. Wang, L. Y. Li, J. Yu
openaire   +1 more source