Results 51 to 60 of about 570 (182)

Spatial Distribution and Plasmaspheric Ducting of Auroral Kilometric Radiation Revealed by Wind, Polar, and Arase

AGU Advances
Auroral Kilometric Radiation (AKR), the dominant radio emission from Earth, has been extensively studied, though previous analyses were constrained by limited spacecraft coverage.
Siyuan Wu, Daniel K. Whiter, Sai Zhang, Ulrich Taubenschuss, Philippe Zarka, Georg Fischer, Laurent Lamy, Shengyi Ye, James Waters, Baptiste Cecconi, Ping Li, Caitriona M. Jackman, Alexandra R. Fogg, Claire Baskevitch, Yoshiya Kasahara, Yasumasa Kasaba   +15 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

Refilling of the Earth's plasmasphere

Eos, Transactions American Geophysical Union, 1991
The Earth's ionosphere at mid‐latitudes is produced chiefly by solar EUV‐induced photo‐ionization of the neutral atmosphere at altitudes of 90 to 300–400 kilometers. Such ionized gas, or plasma—entrained by the Earth's (basically bipolar) magnetic field—flows upward along magnetic lines of force, until the plasma gas pressure is equalized along the ...
J. L. Horwitz, N. Singh
openaire   +1 more source

Arase/LEPi Observations of Low‐Energy H+ and O+ Ion Fluxes in the Inner Magnetosphere: Implications for the Relationship Between Warm Plasma Cloak and Oxygen Torus

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We investigated the spatial distributions and pitch‐angle distributions of 30–300 eV H+ and O+ ion fluxes using data obtained by the low‐energy particle experiments‐ion mass analyzer (LEPi) onboard the Arase satellite. A statistical analysis over 3.7 years reveals that the H+ ion flux is enhanced at L > 4 from the premidnight sector through ...
Masahito Nosé, Kazushi Asamura, Yoshizumi Miyoshi, Jih‐Hong Shue, Trunali Shah, Ayako Matsuoka, Mariko Teramoto, Kazuhiro Yamamoto, Atsushi Kumamoto, Fuminori Tsuchiya, Yoshiya Kasahara, Atsuki Shinbori, Iku Shinohara   +12 more
wiley   +1 more source

Fundamental Poloidal Wave Event Extending From Midnight to Dawn

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Fundamental poloidal (P1) waves are a class of magnetospheric standing Alfvén waves characterized by field line oscillations in the meridional plane. P1 waves are infrequently excited in the ring current region and are believed to be the source of giant pulsations (Pgs) observed on the ground. Pgs are mostly detected on the morning side with a
Kazue Takahashi, Michael D. Hartinger, Kiyokazu Koga   +2 more
wiley   +1 more source

Observing the Earth's Plasmasphere and Ionosphere From the Lunar Surface

Geophysical Research Letters
We present the analysis of the first lunar‐based observational characterization of the Earth's plasmasphere and ionosphere using Global Navigation Satellite Systems signals tracked from the lunar surface by the Lunar GNSS Receiver Experiment (LuGRE). The
C. Cesaroni, L. Spogli, M. Guerra, R. Ghidoni, V. Ventriglia, A. Minetto, A. Nardin, L. Alfonsi, F. Dovis   +8 more
doaj   +1 more source

An Ionospheric Storm Scale Index Based on TEC: Comparative Analysis for China Region

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Defining a standardized ionospheric storm scale is challenging given the ionosphere's inherent complexity and susceptibility to multiple driving factors. In this study, a novel ionospheric storm scale (ISS) index is developed based on statistical analysis of total electron content (TEC) data from 257 ground‐based GNSS stations across China ...
Shuangshuang Shi, Yunfei Shi, Kefei Zhang, Bingfeng Tan, Fucheng Song, Peng Sun, Yu Li, Yifan Liu, Shouxing Zhao   +8 more
wiley   +1 more source

Mathematical demonstration of the generation mechanism of the corotation electric field in Earth’s plasmasphere

Frontiers in Astronomy and Space Sciences
Explanations of the mechanism governing plasmasphere corotation typically begin from the principle of a frozen-in magnetic field, whereby magnetic field lines drive the plasma to corotate synchronously with the Earth.
Zhongqi Lv
doaj   +1 more source

Response of Topside Ionospheric Electron Density During Solar Flares Using 2014–2024 Swarm Satellite Measurements

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract This paper presents a global statistical investigation into the topside ionosphere electron density response to X‐class solar flares during geomagnetically quiet conditions (Kp ≤ $\mathit{\le }$ 2) using Swarm satellites (462–511 km) data from 2014 to 2024.
Kenny Palo Monontsi, John Bosco Habarulema, Alessio Pignalberi, Christopher Dzivhuluwani Ndiitwani   +3 more
wiley   +1 more source

Monitoring Space Weather: Using Automated, Accurate Neural Network Based Whistler Segmentation for Whistler Inversion

Space Weather, 2022
It is challenging, yet important, to measure the—ever‐changing—cold electron density in the plasmasphere. The cold electron density inside and outside of the plasmapause is a key parameter for radiation belt dynamics.
Bálint Ármin Pataki, János Lichtenberger, Mark Clilverd, Gergely Máthé, Péter Steinbach, Szilárd Pásztor, Lilla Murár‐Juhász, Dávid Koronczay, Orsolya Ferencz, István Csabai   +9 more
doaj   +1 more source