Dynamics of soap bubble bursting and its implications to volcano acoustics

Details Dynamics of soap bubble bursting and its implications to volcano acoustics Dynamics of soap bubble bursting and its implications to volcano acoustics

2010-04-13

arxiv.org/abs/1004.2180v1

Geophysical Research Letters 37 (2010) L07302

Physics

Geophysics

Scientific paper

10.1029/2009GL042360

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.

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