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Ondes de torsion dans le noyau terrestre

Abstract : Earth magnetic field is due to external and internal sources. On decennal time scale, this field has abrupt variations called "geomagnetic jerks". A possible explanation concerns Alfvèn magnetic waves in the liquid outer core.
After introduction of these kind of waves (Alfvèn waves, wave equation), propagation of these kind of wave is studied in the outer core, with the presence or not of an solid inner core.
Last, an excitation mecanism of external origin of these waves is studied.
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https://tel.archives-ouvertes.fr/tel-00011706
Contributor : Gédéon Legaut <>
Submitted on : Wednesday, March 1, 2006 - 5:53:56 PM
Last modification on : Thursday, November 19, 2020 - 3:54:28 PM
Long-term archiving on: : Saturday, April 3, 2010 - 8:54:18 PM

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  • HAL Id : tel-00011706, version 1

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Gédéon Legaut. Ondes de torsion dans le noyau terrestre. Géophysique [physics.geo-ph]. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00011706⟩

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