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Ondes 'electromagn'etiques TBF observ'ees par DEMETER

Abstract : Results based on wave measurements performed by the DEMETER spacecraft are presented. We focus on two different phenomena : 1) effects possibly connected with seismic activity 2) emissions with a line structure. 1) We present a statistical study of intensity of electromagnetic waves observed in the vicinity of earthquakes. It is shown that during the night there is a statistically significant decrease of wave intensity shortly before the time of the main shock. 2)We present a survey of the events with a line structure. A statistically significant set of events has been obtained both by using an automatic identification procedure and visual inspection of the data. All the events are thoroughly analyzed and classified. Moreover, in the ELF range (where all the six electromagnetic field components are measured during the Burst mode), a detailed wave analysis has been performed.
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Submitted on : Friday, April 20, 2012 - 11:11:41 AM
Last modification on : Tuesday, October 19, 2021 - 6:59:10 PM
Long-term archiving on: : Monday, November 26, 2012 - 3:15:19 PM

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  • HAL Id : tel-00689795, version 1

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Frantisek Nemec. Ondes 'electromagn'etiques TBF observ'ees par DEMETER. Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]. Université d'Orléans, 2009. Français. ⟨NNT : ⟩. ⟨tel-00689795⟩

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