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Comparative magnetotail flapping: An overview of selected events at Earth, Jupiter and Saturn

Comparative magnetotail flapping: An overview of selected events at Earth, Jupiter and Saturn
Comparative magnetotail flapping: An overview of selected events at Earth, Jupiter and Saturn

A comparison of magnetotail flapping (the up-and-down wavy motion) between the Earth and the two giant planets Jupiter and Saturn has been performed through investigation of the current sheet normal of the magnetotail. Magnetotail flapping is commonly observed in the Earth's magnetotail. Due to single spacecraft missions at the giant planets, the normal is determined through minimum variance analysis of magnetometer data during multiple intervals when the spacecraft crossed through the current sheet. It is shown that indeed a case can be made that magnetotail flapping also occurs at Jupiter and Saturn. Calculations of the wave period using generic magnetotail models show that the observed periods are much shorter than their theoretical estimates, and that this discrepancy can be caused by unknown input parameters for the tail models (e.g., current sheet thickness) and by possible Doppler shifting of the waves in the spacecraft frame through the fast rotation of the giant planets.

Magnetospheric physics (Magnetotail, MHD waves and instabilities)
0992-7689
817-883
Volwerk, M.
c933ef39-6c6b-4aea-b95f-0a2626121300
André, N.
210d2676-9716-4567-bc3a-2f4dfdb34f9b
Arridge, C. S.
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Jackman, C. M.
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Jia, X.
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Milan, S. E.
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Radioti, A.
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Vogt, M. F.
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Walsh, A. P.
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Nakamura, R.
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Masters, A.
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Forsyth, C.
f3d464cf-81c5-4647-b85a-bc3634bdf076
Volwerk, M.
c933ef39-6c6b-4aea-b95f-0a2626121300
André, N.
210d2676-9716-4567-bc3a-2f4dfdb34f9b
Arridge, C. S.
2efb7acf-be5b-41b4-bade-8b4ff0d78236
Jackman, C. M.
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Jia, X.
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Milan, S. E.
b6dd5367-b0c4-4f30-953a-f2d13078d656
Radioti, A.
0451be9e-9800-44fb-bb31-abb5fe00958a
Vogt, M. F.
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Walsh, A. P.
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Nakamura, R.
32e21fb4-3867-4da1-8d1a-657b26a11bae
Masters, A.
f786c4c5-d2bb-46e7-9a73-ddccac79e6fc
Forsyth, C.
f3d464cf-81c5-4647-b85a-bc3634bdf076

Volwerk, M., André, N., Arridge, C. S., Jackman, C. M., Jia, X., Milan, S. E., Radioti, A., Vogt, M. F., Walsh, A. P., Nakamura, R., Masters, A. and Forsyth, C. (2013) Comparative magnetotail flapping: An overview of selected events at Earth, Jupiter and Saturn. Annales Geophysicae, 31 (5), 817-883. (doi:10.5194/angeo-31-817-2013).

Record type: Article

Abstract

A comparison of magnetotail flapping (the up-and-down wavy motion) between the Earth and the two giant planets Jupiter and Saturn has been performed through investigation of the current sheet normal of the magnetotail. Magnetotail flapping is commonly observed in the Earth's magnetotail. Due to single spacecraft missions at the giant planets, the normal is determined through minimum variance analysis of magnetometer data during multiple intervals when the spacecraft crossed through the current sheet. It is shown that indeed a case can be made that magnetotail flapping also occurs at Jupiter and Saturn. Calculations of the wave period using generic magnetotail models show that the observed periods are much shorter than their theoretical estimates, and that this discrepancy can be caused by unknown input parameters for the tail models (e.g., current sheet thickness) and by possible Doppler shifting of the waves in the spacecraft frame through the fast rotation of the giant planets.

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More information

Accepted/In Press date: 12 April 2013
Published date: 6 May 2013
Keywords: Magnetospheric physics (Magnetotail, MHD waves and instabilities)

Identifiers

Local EPrints ID: 436565
URI: http://eprints.soton.ac.uk/id/eprint/436565
ISSN: 0992-7689
PURE UUID: 883159a9-1460-4dff-ab2c-43afabe6a19f
ORCID for C. M. Jackman: ORCID iD orcid.org/0000-0003-0635-7361

Catalogue record

Date deposited: 13 Dec 2019 17:30
Last modified: 10 Nov 2021 03:35

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Contributors

Author: M. Volwerk
Author: N. André
Author: C. S. Arridge
Author: C. M. Jackman ORCID iD
Author: X. Jia
Author: S. E. Milan
Author: A. Radioti
Author: M. F. Vogt
Author: A. P. Walsh
Author: R. Nakamura
Author: A. Masters
Author: C. Forsyth

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