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Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

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Three-dimensional seismic array characterization study: experiment and modeling.

Arslan M Tashmukhambetov¹, George E Ioup, Juliette W Ioup

¹Department of Physics, University of New Orleans, New Orleans, Louisiana 70148, USA.

The Journal of the Acoustical Society of America

|June 10, 2008

Summary

Marine seismic airgun array acoustic data were collected and modeled. Experimental and modeled data showed good agreement up to 1000 Hz, aiding in predicting environmental impacts.

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Area of Science:

Marine acoustics
Seismic exploration
Environmental acoustics

Background:

Marine seismic surveys utilize airgun arrays for geological exploration.
Understanding acoustic propagation is crucial for assessing environmental impacts.

Purpose of the Study:

To characterize the acoustic output of a marine seismic airgun array.
To validate acoustic propagation models with experimental data.
To inform predictions of sound exposure for marine life.

Main Methods:

Deployed Environmental Acoustic Recording System buoys to record acoustic data.
Used a 21-element marine seismic airgun array (0.0588 m³).
Analyzed pressure-time dependencies and modeled acoustic propagation.

Main Results:

Collected broadband acoustic data (up to 25 kHz) at various ranges and angles.
Experimental and modeled data exhibited good agreement for frequencies up to 1000 Hz.
Quantified received pressure levels and sound exposure levels.

Conclusions:

The study successfully characterized seismic airgun array acoustics.
Validated acoustic models are reliable for predicting sound levels in marine environments.
Findings support environmental impact assessments for future seismic surveys.