Results 71 to 80 of about 4,707 (204)

Analyzing Geomagnetic Data From the Dusheti Observatory During the Intense Magnetic Storms of 2024

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract Geomagnetic storms, intense disturbances in the Earth's magnetosphere, pose risks to both technology and human activity in space. In this study, we analyzed geomagnetic field measurements from the Dusheti Observatory in Georgia during the intense geomagnetic storms of March 3, March 24, and 11 May 2024.
Oleg Kharshiladze, Luka Tsulukidze, Aleksandre Ghurchumelia, Luca Sorriso‐Valvo, Khatuna Elbakidze, Emiliya Yordanova, Tamaz Matiashvili   +6 more
wiley   +1 more source

Annual and Seasonal Occurrence Pattern of Auroral Kilometric Radiation Associated with the Interplanetary Magnetic Field

The Astrophysical Journal Letters
Auroral kilometric radiation (AKR) is a widely existing strong radio emission from the Earth’s magnetosphere and is generated by suprathermal (1–10 keV) electrons in the polar cavity.
Ping Li, Sai Zhang, Fuliang Xiao, Hongming Yang, Shengyi Ye, Si Liu, Yihua He, Qiwu Yang, Jiawen Tang, Archie James Johnston   +9 more
doaj   +1 more source

Saturn as a radio source [PDF]

Magnetospheric radio emissions, Saturn electrostatic discharges, inferred source locations, and emission theories are ...
Desch, M. D., Genova, F., Kaiser, M. L., Kurth, W. S., Lecscheux, A., Pedersem, B. M.   +5 more
core   +1 more source

Stellar Radio Astronomy. Probing Stellar Atmospheres from Protostars to Giants

, 2002
Radio astronomy has provided evidence for the presence of ionized atmospheres around almost all classes of non-degenerate stars. Magnetically confined coronae dominate in the cool half of the Hertzsprung-Russell diagram.
Guedel, Manuel
core   +1 more source

Statistical Characteristics of Electron Precipitation During HSS‐ and ICME‐Driven Storms Observed by the EISCAT Radar

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The 1–100 keV electron precipitation during storm time has been studied by applying the updated ELSPEC inversion method to field‐aligned electron density profiles measured by the EISCAT Tromsø radar at L = 6.5. The statistical properties of peak energy, total energy flux, and total number flux as a function of MLT have been studied for the two
N. M. Ellahouny, A. T. Aikio, I. I. Virtanen, H. Vanhamäki, L. Cai, M. N. Pedersen, H. W. Tesfaw   +6 more
wiley   +1 more source

A Tale of Two Current Sheets

, 2010
I outline a new model of particle acceleration in the current sheet separating the closed from the open field lines in the force-free model of pulsar magnetospheres, based on reconnection at the light cylinder and "auroral" acceleration occurring in the ...
A Deutsch, A Gruzinov, A Gruzinov, A Lyne, A Spitkovsky, A Timokhin, AK Harding, AK Harding, B Gaensler, C Kalapotharakos, CF Michel, DM Scott, ET Scharlemann, F Pacini, FV Coroniti, G Paschmann, I Contopoulos, J Arons, J Arons, J Arons, J Ostriker, J Rankin, JA Hibschman, KS Cheng, L DelZanna, M Kramer, M Livingstone, MC Begelman, MF Bietenholz, MJ Rees, P Goldreich, P Slane, PA Sturrock, R Blandford, S Bogdanov, S Komissarov, S Zenitani, SV Bogovalov, VE Zavlin, X Bai   +39 more
core   +1 more source

Evidence of an Extended Alfvén Wing System at Enceladus: Cassini's Multi‐Instrument Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract We report in situ evidence for Enceladus' Alfvén wing system and its coupling with Saturn's ionosphere, based on multi‐instrument observations from the Cassini spacecraft. Analysis of 36 events, including 13 from non‐flyby paths, confirms the existence of a Main Alfvén Wing (MAW) current system generated at Enceladus, and associated Reflected ...
L. Z. Hadid, T. Chust, J.‐E. Wahlund, M. W. Morooka, E. Roussos, O. Witasse, J. Rabia, D. Pisa, K. Kim, N. J. T. Edberg, A. M. Rymer, L. Lamy, S. Kotsiaros, S. Aizawa, A. Jeandet, R. Modolo, N. André, P. Canu, C. F. Bowers, X. Jia, A. J. Coates, G. H. Jones, A. Parsec‐Wallis, O. Agiwal, M. K. G. Holmberg, Q. Nénon, H. Cao, W. S. Kurth, M. K. Dougherty   +28 more
wiley   +1 more source

Determining the State of Jupiter’s Magnetosphere Using In Situ and Remote Sensing Observations

The Astrophysical Journal
While Jupiter’s magnetosphere is primarily governed by internal processes, variations in solar wind conditions can significantly modulate magnetospheric energy.
J. W. Sun, L. Xie, Z. H. Yao, S. Y. Fu, B. Zhang, Y. Xu, F. Leppard, Y. N. Chen, D. Grodent, L. C. Ray, B. Bonfond, W. R. Dunn   +11 more
doaj   +1 more source

A mechanism for bursty radio emission in planetary magnetospheres

Geophysical Research Letters, 1990
Bursty radio emissions are often observed from the polar magnetospheres of the Earth, Jupiter, Saturn, and Uranus in addition to the smooth radio emissions commonly detected. We show that in plasma regimes in which the electron plasma frequency is less than the electron cyclotron frequency, anisotropic electron beams or gyrating electron beams can ...
Wong, H. K., Goldstein, Melvyn
openaire   +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