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AGU: Geophysical Research Letters

 

Keywords

  • acoustics
  • volcanoes

Index Terms

  • Volcanology: Experimental volcanism
  • Volcanology: Remote sensing of volcanoes
  • Volcanology: General or miscellaneous
  • Volcanology: Explosive volcanism

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 37, L07302, 4 PP., 2010
doi:10.1029/2009GL042360

Dynamics of soap bubble bursting and its implications to volcano acoustics

V. Vidal

Laboratorio de Física No Lineal and CIMAT, Departamento de Física, Universidad de Santiago de Chile, Santiago, Chile

Laboratoire de Physique, Université de Lyon, Ecole Normale Supérieure, CNRS, Lyon, France

M. Ripepe

Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Florence, Italy

T. Divoux

Laboratorio de Física No Lineal and CIMAT, Departamento de Física, Universidad de Santiago de Chile, Santiago, Chile

D. Legrand

Universidad de Chile, Departamento de Geofísica, Santiago, Chile

J.-C. Géminard

Laboratorio de Física No Lineal and CIMAT, Departamento de Física, Universidad de Santiago de Chile, Santiago, Chile

Laboratoire de Physique, Université de Lyon, Ecole Normale Supérieure, CNRS, Lyon, France

F. Melo

Laboratorio de Física No Lineal and CIMAT, Departamento de Física, Universidad de Santiago de Chile, Santiago, Chile

In order to assess the physical mechanisms at stake when giant gas bubbles burst at the top of a magma conduit, laboratory experiments have been performed. An overpressurized gas cavity is initially closed by a thin liquid film, which suddenly bursts. The acoustic signal produced by the bursting is investigated. The key result is that the amplitude and energy of the acoustic signal strongly depend on the film rupture time. As the rupture time is uncontrolled in the experiments and in the field, the measurement of the acoustic excess pressure in the atmosphere, alone, cannot provide any information on the overpressure inside the bubble before explosion. This could explain the low energy partitioning between infrasound, seismic and explosive dynamics often observed on volcanoes.

Received 1 January 2010; accepted 23 February 2010; published 2 April 2010.

Citation: Vidal, V., M. Ripepe, T. Divoux, D. Legrand, J.-C. Géminard, and F. Melo (2010), Dynamics of soap bubble bursting and its implications to volcano acoustics, Geophys. Res. Lett., 37, L07302, doi:10.1029/2009GL042360.

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