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How summit calderas collapse on basaltic volcanoes: new insights from the April 2007 caldera collapse of Piton de la Fournaise volcano

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Published under licence by IOP Publishing Ltd
, , Citation Laurent Michon et al 2008 IOP Conf. Ser.: Earth Environ. Sci. 3 012025 DOI 10.1088/1755-1307/3/1/012025

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1 Laboratoire GéoSciences Réunion, Université de la Réunion, Institut de Physique du Globe de Paris, CNRS, UMR 7154 - Géologie des Systèmes Volcaniques, 15 avenue René Cassin, 97715 Saint Denis, France

2 Institut de Recherche pour le Développement, US 140, BP172, 97492 Sainte-Clotilde cedex, France

3 Dipartimento di Scienze della Terra e Geologico Ambientali, University of Bologna, Piazza di Porta S. Donato 1, 40127, Bologna, Italy

4 Laboratoire Magmas et Volcans, UMR 6524 CNRS-IRD-Université Blaise Pascal, 5 rue Kessler 63 038 Clermont-Ferrand, France

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Abstract

In April 2007, Piton de la Fournaise volcano experienced a caldera collapse during its largest historical eruption. We present here the resulting deformation and a synthesis of the seismicity recorded during recent caldera collapses. It allows us to propose a unifying mechanism that explains the pulsating collapse dynamics.

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10.1088/1755-1307/3/1/012025