<i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?

<i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?

A new concept of the global magnetospheric resonator is suggested for fast magnetosonic waves in which the role of the resonator is played by the near-Earth part of the plasma sheet. It is shown that the magnetosonic wave is confined in this region of the magnetosphere within its boundaries. The...

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Main Authors: A. S. Leonovich, V. A. Mazur
Format: Article
Language:English
Published: Copernicus Publications 2005-03-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/23/1075/2005/angeo-23-1075-2005.pdf
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spelling doaj-931927d92bac4bd0aacba78072897b822020-11-24T21:02:56ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762005-03-01231075107910.5194/angeo-23-1075-2005<i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?A. S. Leonovich0V. A. Mazur1Inst. of Solar-Terrestrial Physics (ISTP), Russian Academy of Science, Siberian Branch, Irkutsk 33, 664 033, RussiaInst. of Solar-Terrestrial Physics (ISTP), Russian Academy of Science, Siberian Branch, Irkutsk 33, 664 033, RussiaA new concept of the global magnetospheric resonator is suggested for fast magnetosonic waves in which the role of the resonator is played by the near-Earth part of the plasma sheet. It is shown that the magnetosonic wave is confined in this region of the magnetosphere within its boundaries. The representative value of the resonator's eigenfrequency estimated at <i>f</i>~1MHz is in good agreement with observational data of ultra-low-frequency MHD oscillations of the magnetosphere with a discrete spectrum (<i>f</i>~0.8, 1.3, 1.9, 2.6...MHz). The theory explains the ground-based localization of the oscillations observed in the midnight-morning sector of the high-latitude magnetosphere.https://www.ann-geophys.net/23/1075/2005/angeo-23-1075-2005.pdf
collection DOAJ
language English
format Article
sources DOAJ
author A. S. Leonovich
V. A. Mazur
spellingShingle A. S. Leonovich
V. A. Mazur
<i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?
Annales Geophysicae
author_facet A. S. Leonovich
V. A. Mazur
author_sort A. S. Leonovich
title <i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?
title_short <i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?
title_full <i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?
title_fullStr <i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?
title_full_unstemmed <i>Letter to the Editor</i><br> Why do ultra-low-frequency MHD oscillations with a discrete spectrum exist in the magnetosphere?
title_sort <i>letter to the editor</i><br> why do ultra-low-frequency mhd oscillations with a discrete spectrum exist in the magnetosphere?
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2005-03-01
description A new concept of the global magnetospheric resonator is suggested for fast magnetosonic waves in which the role of the resonator is played by the near-Earth part of the plasma sheet. It is shown that the magnetosonic wave is confined in this region of the magnetosphere within its boundaries. The representative value of the resonator's eigenfrequency estimated at <i>f</i>~1MHz is in good agreement with observational data of ultra-low-frequency MHD oscillations of the magnetosphere with a discrete spectrum (<i>f</i>~0.8, 1.3, 1.9, 2.6...MHz). The theory explains the ground-based localization of the oscillations observed in the midnight-morning sector of the high-latitude magnetosphere.
url https://www.ann-geophys.net/23/1075/2005/angeo-23-1075-2005.pdf
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AT vamazur ilettertotheeditoribrwhydoultralowfrequencymhdoscillationswithadiscretespectrumexistinthemagnetosphere
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