Results 51 to 60 of about 989 (165)

MMS Observation of Trapping of Electrons by Chorus Waves Inside a Magnetic Hole

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We present an event of chorus waves embedded within a magnetic hole (MH) in the Earth's magnetosheath, observed by the Magnetospheric Multi‐Scale (MMS) mission on 1 March 2016. Unlike conventional cases where chorus waves are typically detected near the center of a magnetic depression, in this event lower‐band chorus waves appear predominantly
Krushna C. Barik, Yoshiharu Omura, Satyavir Singh   +2 more
wiley   +1 more source

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, Chio-Zong Cheng, Sunny Wing-Yee Tam, Chih-Yu Chiang, Yoshizumi Miyoshi, Tomoaki Hori, Takefumi Mitani, Takeshi Takashima, Ayako Matsuoka, Mariko Teramoto, Iku Shinohara   +10 more
doaj   +1 more source

STUDY ON THE PARTICLE INJECTIONS DURING HILDCAA INTERVALS [PDF]

Journal of Astronomy and Space Sciences, 2007
The relation between substorm occurrences and HILDCAA events has been an issue. We have studied the association of particle injections with substorm onsets during HILDCAA intervals for the first half of year 2003.
Hee-Jeong Kim
doaj   +1 more source

Relation of the auroral substorm to the substorm current wedge [PDF]

Geoscience Letters, 2016
The auroral substorm is an organized sequence of events seen in the aurora near midnight. It is a manifestation of the magnetospheric substorm which is a disturbance of the magnetosphere brought about by the solar wind transfer of magnetic flux from the dayside to the tail lobes and its return through the plasma sheet to the dayside.
McPherron, Robert L., Chu, Xiangning
openaire   +1 more source

Simultaneous Observations of Electron Phase Space Density Variations in the Geostationary Orbit by GK2A, GOES‐16, and GOES‐17

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract This study presents simultaneous measurements of electron phase space density (PSD) gradients in geostationary orbit using data from GK2A, GOES‐16, and GOES‐17. By leveraging a three‐satellite configuration, we provide statistical results of PSD gradient estimation in invariant coordinates.
N.‐Y. Lee, J. Seon, G. W. Na, C.‐H. Lee, W.‐H. Seol, K.‐C. Kim   +5 more
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

The electric field response to the growth phase and expansion phase onset of a small isolated substorm [PDF]

Annales Geophysicae, 1997
We capitalise on the very large field of view of the Halley HF radar to provide a comprehensive description of the electric field response to the substorm growth phase and expansion phase onset of a relatively simple isolated substorm ( |AL| < 250 nT)
R. V. Lewis, M. P. Freeman, A. S. Rodger, G. D. Reeves, D. K. Milling   +4 more
doaj   +1 more source

Frequency Extensions of Auroral Kilometric Radiation: The Key to Unlocking Earth's Radio Response to Substorms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Auroral kilometric radiation (AKR) provides a sensitive probe of magnetospheric dynamics during substorms. We analyze an extended data set of AKR bursts observed by the WIND spacecraft to investigate how the frequency structure of AKR responds to substorm onset and evolution.
Simon James Walker, Caitríona M. Jackman, Alexandra R. Fogg, Siyuan Wu, James E. Waters   +4 more
wiley   +1 more source

Formation of Continuum Emission Structures Associated With the Aurora

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Recent observations enabled by improvements in geospace remote‐sensing instrumentation have revealed the spatial structure of continuum emissions that appear to be associated with the aurora, but little is known about the formation and drivers of these structures.
J. Houghton, E. Spanswick, J. Liang, B. Gallardo‐Lacourt   +3 more
wiley   +1 more source

Substorm Identification With the WINDMI Magnetosphere ‐ Ionosphere Nonlinear Physics Model

Space Weather
We 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