Results 81 to 90 of about 7,217 (205)
ERG observations of drift echoes during a unique period of the satellite mission
Earth, Planets and Space, 2019 Substorm-associated electron injection, starting on Apr. 5, 2017, was observed by the ERG (Arase), GOES-15 and GOES-13 spacecraft. ERG successfully observed a clear and sufficient extent of manifestations of the dispersionless injection and the ...
Tzu-Fang Chang +10 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract The Earth's strongest natural radio emission is Auroral Kilometric Radiation (AKR), which is correlated with auroral intensity, and is a barometer for space weather. AKR is generated by the electron cyclotron maser instability, with sources on auroral field lines. Previous work on AKR and radio emissions from other planets (or stars) points to
Alexandra Ruth Fogg +9 more
wiley +1 more source
Comparison of the Ionosphere During an SMC Initiating Substorm and an Isolated Substorm [PDF]
Journal of Geophysical Research: Space Physics, 2018 AbstractIn order to assess the effects of ionospheric feedback on different modes of energy transport in the magnetosphere, we investigate an isolated substorm and a steady magnetospheric convection (SMC) event with very similar solar wind drivers. The primary focus is on a comparison between the isolated substorm and the substorm that initiates the ...
A. D. DeJong, J. M. Bell, A. Ridley
openaire +2 more sources
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract The neutral wind dynamo generates ionospheric currents that can significantly affect high‐latitude electrodynamics during geomagnetic storms, yet its role in global magnetosphere‐ionosphere coupling is often underrepresented. We quantify the impact of wind‐driven currents on geomagnetic disturbances (GMDs) and magnetospheric dynamics during ...
Yu Hong +4 more
wiley +1 more source
Modeling Kinetic Reconnection Onset in Global Magnetospheric Simulations
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract We investigate the onset of magnetic reconnection in Earth's magnetotail using a coupled magnetohydrodynamic with embedded particle‐in‐cell (MHD‐EPIC) model, which self‐consistently links global magnetospheric dynamics to electron‐scale kinetic processes. Unlike standalone kinetic simulations with idealized boundary conditions, reconnection in
Talha Arshad, Yuxi Chen, Gabor Toth
wiley +1 more source
Study of the substorm: Part 2: Development of magnetosphere-ionosphere convection to the substorm
Antarctic Record, 2014 It has been believed that the substorm is a manifestation of extraordinary plasma processes in the magnetosphere, such as instability, anomalous resistivity, and reconnection.
Takashi Tanaka
doaj +1 more source
Identifying Alfvénic Modulation of Quasi‐Static Potential Structures Above Aurora by Optical Methods
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract Much observational evidence exists for the presence of quasi‐electrostatic potential drops above aurorae and their role in acceleration of auroral electrons. However, the temporal evolution of these potential structures is less well studied. We present an optical‐only method for investigating counter‐flowing auroral forms, hypothesized to be ...
N. Brindley, D. Whiter
wiley +1 more source
Substorm Identification With the WINDMI Magnetosphere ‐ Ionosphere Nonlinear Physics Model
Space WeatherWe investigate the applicability and performance of the plasma physics based WINDMI model to the analysis and identification of substorm onsets. There are several substorm onset criteria that have been developed into event lists, either from auroral ...
P. Adhya, E. Spencer, M. Kayode‐Adeoye
doaj +1 more source
Rapid Magnetotail Reconfiguration and Ion‐Scale Wave Activity at Mercury
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract Mercury's magnetosphere is an extremely dynamic environment, where substorm‐like activity, including dipolarization fronts and particle acceleration, periodically disrupts the stability and radial extent of the closed field line region. The common narrowband ∼1 Hz waves at Mercury, near the local proton gyrofrequency are preferentially ...
M. Persson +7 more
wiley +1 more source
Space Weather Mitigation Decisions by Critical Infrastructure Operators During Solar Cycle 25
Space Weather, Volume 24, Issue 9, September 2026.Abstract The “Gannon Storm” in May 2024 was the largest space weather event experienced in 20 years, generating auroras at latitudes as low as 35°, visible in Florida and Mexico. Such events pose significant operational challenges for critical infrastructure operators, particularly those managing electricity transmission networks, satellite ...
C. M. LaNeve +5 more
wiley +1 more source