Journal ArticleDOI
Physical characteristics and triggering mechanisms of the 2009-2010 landslide crisis at Montagne Pelée volcano, Martinique: : implication for erosional processes and debris-flow hazards
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TLDR
A detailed description of a landslide sequence that occurred in 2009 and 2010 on the western flank of Montagne Pelee volcano, originating at the Samperre cliff, is presented in this paper.Abstract:
Flank destabilizations are common processes in the life of a volcano. Apart from giant landslides with recurrence times of tens of thousands of years and whose deposits are identified in the bathymetry around the islands, less voluminous but more frequent erosional landslides contribute significantly to the morphological development of the topography. In this paper, we present a detailed description of a landslide sequence that occurred in 2009 and 2010 on the western flank of Montagne Pelee volcano, originating at the Samperre cliff. This sequence is characterized by two main events, in August 2009 and May 2010, and hundreds of smaller collapses. From seismic data and high resolution topographic data from airborne Lidar, collapses are counted and volumes of the main events are estimated. The May 2010 landslide has removed 2.1 millions of m3 of debris, which were subsequently remobilized during several hazardous lahars. The mean rates of erosion deduced from these volumes indicate that this kind of erosional landslide could represent a long term contribution of the same order of magnitude as giant flank collapses. The characterization of the runout of the landslides and of the Samperre cliff slopes provide important information for risk assessment, in particular for the risk of lahars that threaten the population living on the lower slopes.read more
Citations
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Understanding how volume affects the mobility of dry debris flows
Lydie Staron,Eric Lajeunesse +1 more
TL;DR: In this article, the authors analyse field data and discrete numerical simulations of granular flows and demonstrate the geometrical origin of the apparent enhancement of the mobility with the volume of a rock avalanche.
Journal ArticleDOI
Single-block rockfall dynamics inferred from seismic signal analysis
Clément Hibert,Jean-Philippe Malet,Franck Bourrier,Floriane Provost,Frédéric Berger,Pierrick Bornemann,Pascal Tardif,Eric Mermin +7 more
TL;DR: In this article, the authors used an instrumentation combining video cameras and seismometers to reconstruct the trajectories of the falling blocks and estimate their velocities at the time of different impacts with the slope.
Journal ArticleDOI
The relationship between bulk‐mass momentum and short‐period seismic radiation in catastrophic landslides
TL;DR: In this paper, the authors investigated the relationship between bulk-mass dynamic properties of catastrophic landslides and the generation of short-period seismic waves, with a particular focus on the momentum of the landslide mass and the envelope of high-frequency seismograms.
Journal ArticleDOI
Using Airborne LiDAR Survey to explore Historic-era archaeological landscapes of Montserrat in the Eastern Caribbean
TL;DR: In this article, the authors describe the first archaeological application of airborne LiDAR survey to historic-era landscapes in the Caribbean archipelago, on the island of Montserrat.
Journal ArticleDOI
Construction and Destruction of Mont Pelée Volcano: Volumes and Rates Constrained from a Geomorphological Model of Evolution
Aurélie Germa,Aurélie Germa,Aurélie Germa,Pierre Lahitte,Pierre Lahitte,Xavier Quidelleur,Xavier Quidelleur +6 more
TL;DR: In this paper, the authors presented long-term volumes and construction rates for the Mont Conil-Mont Pelee volcano and rate estimates at which volcanic activity creates relief, using ShapeVolc to numerically model topographic surfaces.
References
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Journal ArticleDOI
The physics of debris flows
TL;DR: In this paper, a simple model that satisfies most of these criteria uses depth-averaged equations of motion patterned after those of the Savage-Hutter theory for gravity-driven flow of dry granular masses but generalized to include the effects of viscous pore fluid with varying pressure.
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Bedrock incision, rock uplift and threshold hillslopes in the northwestern Himalayas
Douglas W. Burbank,John Leland,Eric J. Fielding,Robert S. Anderson,Nicholas Brozovic,Mary R. Reid,Chris Duncan +6 more
TL;DR: The topography of tectonically active mountain ranges reflects a poorly understood competition between bedrock uplift and erosion as mentioned in this paper, and the Indus river incises through the bedrock at extremely high rates (2-12 mm yr-1).
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Prodigious submarine landslides on the Hawaiian Ridge
James G. Moore,David A. Clague,Robin T. Holcomb,Peter W. Lipman,William R. Normark,Michael E. Torresan +5 more
TL;DR: The extensive area covered by major submarine mass wasting deposits on or near the Hawaiian Ridge has been delimited by systematic mapping of the Hawaiian exclusive economic zone using the side-looking sonar system GLORIA as mentioned in this paper.
Journal ArticleDOI
The mobility of long-runout landslides
TL;DR: In this article, it was shown that the apparent coefficient of friction (ratio of the fall height to the runout distance) commonly used to describe landslide mobility is physically meaningless.
Journal ArticleDOI
Large volcanic debris avalanches: Characteristics of source areas, deposits, and associated eruptions
TL;DR: In this paper, the authors show that large volcanic debris avalanches, often exceeding a cubic kilometer in volume, create massive amphitheater-shaped reentrants into the volcanic edifice that differ in morphology and origin from normal collapse calderas.