Upward migration of Vesuvius magma chamber over the past 20,000 years

B. Scaillet (), M. Pichavant and R. Cioni
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B. Scaillet: CNRS/INSU—Institut des Sciences de la Terre d’Orléans, 1a rue de la Férollerie, 45071 Orléans, cedex 2, France
M. Pichavant: CNRS/INSU—Institut des Sciences de la Terre d’Orléans, 1a rue de la Férollerie, 45071 Orléans, cedex 2, France
R. Cioni: Via Trentino 51, 09127 Cagliari, Italy

Nature, 2008, vol. 455, issue 7210, 216-219

Abstract: Vesuvius raises the bar Many magma outbreaks have occurred since Vesuvius left its mark in history in AD 79 by destroying Pompeii and Herculaneum, most recently in 1944. A new eruption could threaten more than 700,000 people in the Bay of Naples, hence the importance of attempts to forecast the eruptive activity of Vesuvius. The depth of the magma reservoir is one of the main parameters controlling magma properties and eruptive style. It had been assumed that the reservoirs that have fed the eruptions during the past 20,000 years have remained roughly in the same place. Yet detailed reconstructions of magma storage conditions based on analysis of material from four main explosive events at Vesuvius show that they have migrated upwards by about 9-11 km between the Pomici di Base event, about 18,500 years ago, and the 1944 eruption. This reservoir migration, and the possible influence on magma feeding rates, should therefore be considered when defining expected eruptive scenarios at Vesuvius.

Date: 2008
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DOI: 10.1038/nature07232

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