Numerical modeling of the mount Steller landslide flow history and of the generated long period seismic waves - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2012

Numerical modeling of the mount Steller landslide flow history and of the generated long period seismic waves

Résumé

The rock-ice avalanche that occurred in 2005 on Mount Steller, Alaska and the resulting long period seismic waves have been simulated for different avalanche scenarios (i.e., flow histories), with and without erosion processes taken into account. This 40-60 Mm3 avalanche traveled about 10 km down the slope, mainly on top of a glacier, eroding a significant amount of ice. It was recorded by 7 broadband seismic stations. The simulations were compared with the recorded long period seismic signal and with the inverted flow history. The results show that, when erosion processes are taken into account, the simulations reproduce the observed signal at all the stations over a wide range of azimuths and source-station distances (37-623 km). This comparison makes it possible to constrain the rheological parameters involved which should help constrain the volume of eroded material. Because landslides are continuously recorded by seismic networks, this method could significantly broaden quantitative insights into natural flow dynamics.
Fichier principal
Vignette du fichier
Moretti_et_al-2012-Geophysical_Research_Letters.pdf (2.96 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00728958 , version 1 (03-11-2017)

Identifiants

Citer

Laurent Moretti, Anne Mangeney, Yann Capdeville, Eléonore Stutzmann, Christian Huggel, et al.. Numerical modeling of the mount Steller landslide flow history and of the generated long period seismic waves. Geophysical Research Letters, 2012, 39 (16), pp.L16402. ⟨10.1029/2012GL052511⟩. ⟨hal-00728958⟩
240 Consultations
229 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More