Acoustic clutter from buried submarine mud volcanoes

Charles Holland, Anthony L. Gerig, Piero Boni

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Submarine mud volcanoes occur in many parts of theworld's oceans and form an aperture for gas (mostly methane) and fluidized mud emission from the earth's interior. Their characteristics are of considerable interest to the geology, geophysics, geochemistry and underwater acoustics communities. The presence of mud volcanoes (and other related gassy sediment structures) has a profound effect on low frequency acoustic reverberation. Reverberation data from the Strait of Sicily indicate high scattering from buried mud volcanoes from 150-800 Hz at ranges of 10 km. The scattering decreases sharply above 800 Hz. Two hypotheses are explored regarding the scattering mechanism, scattering by sediment entrained gas, and scattering from the mud volcano structure itself. Modeling indicates that large bubble sizes (mean radius greater than 1 cm) are required to fit the scattering data, suggesting that this hypothesis may be unreasonable. The scattering from the structure itself appears to be the most reasonable scattering mechanism. The cause of the observed sharp decrease with frequency above 800 Hz in the backscattered response is not presently understood.

Original languageEnglish (US)
Title of host publicationAcoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and Experiments
PublisherSpringer Netherlands
Pages109-124
Number of pages16
ISBN (Print)1402043724, 9781402043727
DOIs
StatePublished - 2006

Fingerprint

submarine volcano
mud volcano
acoustics
scattering
geophysics
gas
sediment
strait
bubble
mud
methane
geochemistry
geology

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Holland, C., Gerig, A. L., & Boni, P. (2006). Acoustic clutter from buried submarine mud volcanoes. In Acoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and Experiments (pp. 109-124). Springer Netherlands. https://doi.org/10.1007/978-1-4020-4386-4-9
Holland, Charles ; Gerig, Anthony L. ; Boni, Piero. / Acoustic clutter from buried submarine mud volcanoes. Acoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and Experiments. Springer Netherlands, 2006. pp. 109-124
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Holland, C, Gerig, AL & Boni, P 2006, Acoustic clutter from buried submarine mud volcanoes. in Acoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and Experiments. Springer Netherlands, pp. 109-124. https://doi.org/10.1007/978-1-4020-4386-4-9

Acoustic clutter from buried submarine mud volcanoes. / Holland, Charles; Gerig, Anthony L.; Boni, Piero.

Acoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and Experiments. Springer Netherlands, 2006. p. 109-124.

Research output: Chapter in Book/Report/Conference proceedingChapter

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AB - Submarine mud volcanoes occur in many parts of theworld's oceans and form an aperture for gas (mostly methane) and fluidized mud emission from the earth's interior. Their characteristics are of considerable interest to the geology, geophysics, geochemistry and underwater acoustics communities. The presence of mud volcanoes (and other related gassy sediment structures) has a profound effect on low frequency acoustic reverberation. Reverberation data from the Strait of Sicily indicate high scattering from buried mud volcanoes from 150-800 Hz at ranges of 10 km. The scattering decreases sharply above 800 Hz. Two hypotheses are explored regarding the scattering mechanism, scattering by sediment entrained gas, and scattering from the mud volcano structure itself. Modeling indicates that large bubble sizes (mean radius greater than 1 cm) are required to fit the scattering data, suggesting that this hypothesis may be unreasonable. The scattering from the structure itself appears to be the most reasonable scattering mechanism. The cause of the observed sharp decrease with frequency above 800 Hz in the backscattered response is not presently understood.

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Holland C, Gerig AL, Boni P. Acoustic clutter from buried submarine mud volcanoes. In Acoustic Sensing Techniques for the Shallow Water Environment: Inversion Methods and Experiments. Springer Netherlands. 2006. p. 109-124 https://doi.org/10.1007/978-1-4020-4386-4-9