Séminaire ISTerre

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Underground traffic-induced seismic waves identified to assess rock mass attenuation properties

jeudi 6 octobre 2022 - 11h00

Yves Le Gonidec - Université de Rennes
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Ambient seismic noise experiments have been performed in the underground rock laboratory of Mont Terri where many anthropogenic sources generate complex mechanical vibrations. The aim of the study was first to identify the road traffic activity of individual vehicles driving in the nearby motorway tunnel. The repetitive traffic-induced seismic waves recorded by the use of two neighbouring geophones were then used to characterize the attenuation properties of the rock mass surrounding the laboratory. Dominant polarized body waves have been identified and associated with different geological structures surrounding the main fault. The results motivate the extension of the study to long-term monitoring of the rock mass in response to environmental changes.

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Equipe organisatrice : Ondes et structures

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères

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https://univ-grenoble-alpes-fr.zoom.us/j/8172559109

ID de réunion : 817 255 9109