Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Understanding mudslides through micro-seismic monitoring the Super-Sauze (south-east French Alps) case study

David Amitrano, Stephane Gaffet, Jean-Philippe Malet and Olivier Maquaire
Understanding mudslides through micro-seismic monitoring the Super-Sauze (south-east French Alps) case study (in Issues in landslide process monitoring and understanding, Jean-Philippe Malet (prefacer), Christophe Delacourt (prefacer), Olivier Maquaire (prefacer) and David Amitrano (prefacer))
Bulletin de la Societe Geologique de France (March 2007) 178 (2): 149-157

Abstract

The macroscopic deformation of rocks, at scales ranging from laboratory samples (cm) to rock hillslopes and earth crust (hm to km), is associated with local irreversible processes (cracks/faults propagation and shearing). These movements involve propagation of acoustic waves, which can be observed by remote sensing. Seismic monitoring during strain progression can help our understanding of rock behaviour and lead to the recognition of failure precursors. Although of significant potential, this observational tool has had only limited application in the study of gravitational instabilities such as landslides. This paper presents seismic monitoring data acquired on a mudslide located in the South French Alps. Results show that recordable seismicity exists in the frequency range of 0.01 Hz to 10 Hz associated with landslide deformation. Acceleration of landslide movement is controlled by rainfall and appears to be well correlated with seismic activity. The origin of the seismicity is attributed to shearing of the moving mass at the interface with the in-situ stable bedrock. Spectral analysis of the seismic wave reveals that the range 0.1-1 Hz is the most sensitive to the variations in landslide velocity. The results emphasize the strong potential of seismic monitoring for improving our understanding of mechanisms controlling rock mass deformation and gravitational instability. The determination of operational failure precursors based on seismic monitoring has yet to be achieved but remains a major target of future research.


ISSN: 0037-9409
EISSN: 1777-5817
Serial Title: Bulletin de la Societe Geologique de France
Serial Volume: 178
Serial Issue: 2
Title: Understanding mudslides through micro-seismic monitoring the Super-Sauze (south-east French Alps) case study
Title: Issues in landslide process monitoring and understanding
Author(s): Amitrano, DavidGaffet, StephaneMalet, Jean-PhilippeMaquaire, Olivier
Author(s): Malet, Jean-Philippeprefacer
Author(s): Delacourt, Christopheprefacer
Author(s): Maquaire, Olivierprefacer
Author(s): Amitrano, Davidprefacer
Affiliation: Laboratoire Interdisciplinaire de Recherche Impliquant la Geologie et la Mecanique, Grenoble, France
Affiliation: CNRS, Laboratoire de Geographie Physique et de l'Environnement (LETG-Geophen), Caen, France
Pages: 149-157
Published: 200703
Text Language: English
Summary Language: French
Publisher: Societe Geologique de France, Paris, France
References: 28
Accession Number: 2007-051562
Categories: Engineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sect., geol. sketch map
N43°30'00" - N45°00'00", E05°30'00" - E07°00'00"
Secondary Affiliation: Universte de Bretagne Occidentale, FRA, FranceLaboratoire Interdisciplinaire de Recherche Impliquant la Geologie et la Mecanique (LIRIGM), FRA, FranceGeosciences Azur, FRA, FranceUtrecht University, NLD, NetherlandsLaboratoire de Geographie Physique et de l'Environnement, FRA, France
Country of Publication: France
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Societe Geologique de France. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200727
Close Modal

or Create an Account

Close Modal
Close Modal