Results 31 to 40 of about 1,051 (195)

Magnetospheric substorms

Eos, Transactions American Geophysical Union, 1968
The magnetospheric substorm is perhaps the most widely known yet most poorly understood facet of magnetospheric disturbances. It is generally agreed that the substorm results from an explosive conversion of magnetic energy generated by the interaction between the solar wind and the magnetosphere.
openaire   +1 more source

Stormtime Energetics: Energy Transport Across the Magnetopause in a Global MHD Simulation

Frontiers in Astronomy and Space Sciences, 2021
Coupling between the solar wind and magnetosphere can be expressed in terms of energy transfer through the separating boundary known as the magnetopause.
Austin Brenner, Austin Brenner, Tuija I. Pulkkinen, Tuija I. Pulkkinen, Qusai Al Shidi, Gabor Toth   +5 more
doaj   +1 more source

The substorm

Eos, Transactions American Geophysical Union, 1989
The substorm is a thing obscure/ We cannot make it out for sure/ But physicists with lots of nerve/ Fill in details they can't observe/ They see it in their own grand visions/ Of tearing modes with no collisions/ That squeeze away the plasma sheet/ To make opposing fluxes meet/ And in their merging, oh so swift/ Great plasmoids are cut adrift/ Or else ...
openaire   +1 more source

Evolution of Energetic Proton Parallel Pressure Anisotropy at Geosynchronous Altitudes: Potential Role in Triggering Substorm Expansion Phase Onset

Geophysical Research Letters
The sequence of events associated with the triggering of energy release during substorm expansion phase onset is still not well‐understood. Oberhagemann and Mann (2020b, https://doi.org/10.1029/2019gl085271) proposed a new substorm onset mechanism, where
S. S. Babu, I. R. Mann, S. Dimitrakoudis, L. G. Ozeke, I. J. Rae, C. Forsyth, A. W. Smith   +6 more
doaj   +1 more source

Controls on Solar Wind Entry Identified Through Wind–ACE Heavy‐Ion Diagnostics

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Solar wind (SW) entry into the magnetosphere occurs through several mechanisms, but their dependence on the properties of different ion species is unknown. We compare measurements from Wind‐STICS (magnetosphere) with ACE‐SWICS (L1) to test for any preferential entry between He2+ and SW heavy ions.
S. Colón‐Rodríguez, M. W. Liemohn, J. M. Raines, S. T. Lepri   +3 more
wiley   +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

Variations of Mid‐Magnetotail Magnetic Pressure During Substorms

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Magnetic reconnection is commonly observed in the mid‐tail plasma sheet during substorms, the mechanism behind this spatial preference, however, remains unsolved. This study focuses on magnetic pressure evolution within this critical region during substorms.
Xiaowei Ma, Hui Zhang, Huanzhi Yuan, Runze Li   +3 more
wiley   +1 more source

The Shock‐Substorm of 24 September 1998: A Different Type of Substorm Trigger Onset

Geophysical Research Letters
An interplanetary shock triggered a substorm with a peak intensity SML = −1,781 nT on 24 September 1998. This is called a shock‐substorm here to differentiate it from generic substorms.
Bruce T. Tsurutani, Rajkumar Hajra, Yusuke Ebihara, Gurbax S. Lakhina, Yasuhito Narita, Karl‐Heinz Glassmeier   +5 more
doaj   +1 more source

Observations of the Latitude and Frequency Distributions of Equatorward‐Propagating Chorus Waves

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Rising‐tone chorus elements are traditionally known to grow from low frequencies and extend to high frequencies. Using high‐resolution waveform measurements from the Van Allen Probes, we report a novel observation: equatorward‐propagating chorus waves at a few degrees in latitude are observed at high frequencies only.
Qiushuo Wang, Jinxing Li, Jacob Bortnik, Donglai Ma, Jiabei He, Qianli Ma, Ning Kang, Lunjin Chen   +7 more
wiley   +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