Publications des scientifiques de l'IRD

Lacroix Pascal, Perfettini Hugo, Taipe E., Guillier Bertrand. (2014). Coseismic and postseismic motion of a landslide : observations, modeling, and analogy with tectonic faults. Geophysical Research Letters, 41 (9), p. 6676–6680. ISSN 1944-8007.

Titre du document
Coseismic and postseismic motion of a landslide : observations, modeling, and analogy with tectonic faults
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000344913800018
Auteurs
Lacroix Pascal, Perfettini Hugo, Taipe E., Guillier Bertrand
Source
Geophysical Research Letters, 2014, 41 (9), p. 6676–6680 ISSN 1944-8007
We document the first time series of a landslide reactivation by an earthquake using continuous GPS measurements over the Maca landslide (Peru). Our survey shows a coseismic response of the landslide of about 2 cm, followed by a relaxation period of 5 weeks during which postseismic slip is 3 times greater than the coseismic displacement itself. Our results confirm the coseismic activation of landslides and provide the first observation of a postseismic displacement. These observations are consistent with a mechanical model where slip on the landslide basal interface is governed by rate and state friction, analogous to the mechanics of creeping tectonic faults, opening new perspectives to study the mechanics of landslides and active faults.
Plan de classement
Sismologie [066SISMO]
Descripteurs
SEISME ; GLISSEMENT DE TERRAIN ; TELEDETECTION SPATIALE ; FAILLE ; PLUIE ; MODELISATION ; GPS.SYSTEME DE POSITIONNEMENT GLOBAL
Description Géographique
PEROU ; ANDES
Localisation
Fonds IRD [F B010063228]
Identifiant IRD
fdi:010063228
Contact