@article{fdi:010044145,
  title = {{C}aldera rim collapse : {A} hidden volcanic hazard},
  author = {{M}erle, {O}livier and {M}ichon, {L}. and {B}achelery, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{F}ollowing the emblematic flank collapse of {M}ount {S}t {H}elens in 1981, numerous models of flank sliding have been proposed. {T}hese models have allowed to largely improve the understanding of mechanisms involved in such landslides, which represent a tremendous risk for populations living around volcanoes. {I}n this article, a new mode of landslide formation, related to buried calderas, is described. {T}he model emphasizes the paramount importance of the hidden ring fault that, even when the caldera is buried, still remains a plane of weakness in the core of the edifice. {U}nder certain conditions, this plane of weakness becomes activated as the upper part of a pre-existing critical slip surface and is used in the emplacement of huge landslides which travel downslope at a very high velocity. {A} natural example is taken from {P}iton de la {F}ournaise {V}olcano ({L}a {R}eunion {I}sland, {I}ndian {O}cean). {I}t reveals that the primary cause triggering caldera rim collapse is partial unbuttressing of the flank of the volcano. {I}n the natural example, this occurs through regressive erosion that excavates deep canyon in the direction of the buried caldera but other mechanisms may exist. {O}n account of the large volumes of material involved in caldera rim collapse as well as their long runout distances, such a volcanic hazard should be taken into account on every volcano where buried calderas are suspected.},
  keywords = {caldera ; collapse ; ring fault ; hazard ; risk},
  booktitle = {},
  journal = {{J}ournal of {V}olcanology and {G}eothermal {R}esearch},
  volume = {177},
  numero = {2},
  pages = {525--530},
  ISSN = {0377-0273},
  year = {2008},
  DOI = {10.1016/j.jvolgeores.2008.06.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010044145},
}