Skip to Main content Skip to Navigation
Journal articles

April 2007 collapse of Piton de la Fournaise: A new example of caldera formation

Abstract : Collapse calderas are frequent in the evolution of volcanic systems, but very few have formed during historical times. Piton de la Fournaise is one of the world's most active basaltic shield volcanoes. The caldera collapse, which occurred during the April 2007 lateral eruption is one of the few large documented collapse events on this volcano. It helps to understand the mode and origin of caldera collapses in basaltic volcanoes. Field observations, GPS and seismic data show that the collapse occurred at an early stage of the eruption. The cyclic seismic signal suggests a step by step collapse that directly influenced the lateral eruption rate. Likely, the caldera results from the combined effect of (i) the progressive collapse of the plumbing system above the magma chamber since 2000, and (ii) the large amount of magma withdrawal during the early stage of the eruption by both a significant intrusion within the edifice and an important emission rate.
Document type :
Journal articles
Complete list of metadatas

Cited literature [20 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01285148
Contributor : Eva Fareau <>
Submitted on : Tuesday, March 8, 2016 - 4:45:15 PM
Last modification on : Monday, September 2, 2019 - 9:43:18 AM
Long-term archiving on: : Sunday, November 13, 2016 - 11:14:47 AM

File

grl31248.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Laurent Michon, Thomas Staudacher, Valérie Ferrazzini, Patrick Bachèlery, Joan Marti. April 2007 collapse of Piton de la Fournaise: A new example of caldera formation. Geophysical Research Letters, American Geophysical Union, 2007, ⟨10.1029/2007GL031248⟩. ⟨insu-01285148⟩

Share

Metrics

Record views

199

Files downloads

377