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Sismicité du Massif Armoricain : relocalisations et interprétation tectonique

Abstract : The Armorican Massif is an outcropping segment of the Hercynian belt of Western Europe. Nowadays it constitutes an intraplate deformation domain in a passive continental margin context. This deformation finds its expression in a moderate seismic activity characterized by low magnitude earthquakes. The geographical distribution of the seismicity, provided by French seismological organizations, exhibit mainly a diffuse behaviour, with large uncertainties on hypocentral parameters. A new analysis of all seismograms recorded between 1980 and 2004, combined with a stochastic inversion of the arrival times visually picked in this work, enabled me to relocate approximately 1500 earthquakes. A joint interpretation of the latter results and of geophysical data available to date, leads to a better understanding of the seismotectonic processes which trigger this intraplate seismicity.
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https://tel.archives-ouvertes.fr/tel-00117056
Contributor : Pierre Arroucau <>
Submitted on : Wednesday, November 29, 2006 - 5:15:38 PM
Last modification on : Tuesday, October 6, 2020 - 11:40:03 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 8:13:40 PM

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  • HAL Id : tel-00117056, version 1

Citation

Pierre Arroucau. Sismicité du Massif Armoricain : relocalisations et interprétation tectonique. Géophysique [physics.geo-ph]. Université de Nantes, 2006. Français. ⟨tel-00117056⟩

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