Near-specular acoustic scattering from a buried submarine mud volcano

Anthony L. Gerig, Charles Holland

Research output: Contribution to journalArticle

Abstract

Submarine mud volcanoes are objects that form on the seafloor due to the emission of gas and fluidized sediment from the Earth's interior. They vary widely in size, can be exposed or buried, and are of interest to the underwater acoustics community as potential sources of active sonar clutter. Coincident seismic reflection data and low frequency bistatic scattering data were gathered from one such buried mud volcano located in the Straits of Sicily. The bistatic data were generated using a pulsed piston source and a 64-element horizontal array, both towed over the top of the volcano. The purpose of this work was to appropriately model low frequency scattering from the volcano using the bistatic returns, seismic bathymetry, and knowledge of the general geoacoustic properties of the area's seabed to guide understanding and model development. Ray theory, with some approximations, was used to model acoustic propagation through overlying layers. Due to the volcano's size, scattering was modeled using geometric acoustics and a simple representation of volcano shape. Modeled bistatic data compared relatively well with experimental data, although some features remain unexplained. Results of an inversion for the volcano's reflection coefficient indicate that it may be acoustically softer than expected.

Original languageEnglish (US)
Pages (from-to)3280-3285
Number of pages6
JournalJournal of the Acoustical Society of America
Volume122
Issue number6
DOIs
StatePublished - Dec 1 2007

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acoustic scattering
mud
volcanoes
scattering
low frequencies
Sicily
acoustic propagation
straits
bathymeters
underwater acoustics
sonar
clutter
Acoustics
Submarine
Volcano
pistons
rays
sediments
inversions
reflectance

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

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Near-specular acoustic scattering from a buried submarine mud volcano. / Gerig, Anthony L.; Holland, Charles.

In: Journal of the Acoustical Society of America, Vol. 122, No. 6, 01.12.2007, p. 3280-3285.

Research output: Contribution to journalArticle

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