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Experimental Investigation of Seismic Surface Waves in the Seafloor
The Spectral-Analysis-of-Surface-Waves (SASW) method is a nonintrusive seismic method which has been used on land to determine shear modulus profiles...
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Shear Waves in Marine Sediments
Shear waves and closely related interface waves (Rayleigh, Stoneley and Scholte) play an important role in many areas of engineering, geophysics and...
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Concurrent Observations of Directional Spectra of Ocean Surface Waves and Microseisms from an Ocean Subbottom Seismometer (OSS) Array
Analysis of spatially and temporally coherent seafloor motion is conducted using data from an OSS array deployed by the University of Miami’s...
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A technique for conducting seismic refraction experiments on the ocean bed using bottom shots
A technique has been devised for firing arrays of bottom shots on the ocean bed in depths upto 4000 m or more. Ten kilogram explosive charges are...
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Surface Waves in Poro-Viscoelastic Marine Sediments
Marine sediments can be treated as a two-phase porous medium, consisting of a solid phase (the sediment grains) and a fluid phase (the interstitial...
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Analytical Investigation of Seismic Surface Waves in the Seafloor
Analytical studies are being conducted to assess the applicability of the Spectral Analysis of Surface Waves (SASW) method to the determination of...
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A Summary of DREA Observations of Interface Waves at the Seabed
During the past ten years or so, DREA scientists have observed interface waves in shallow water in the frequency range 2 Hz - 20 Hz over a variety of...
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Shear Wave Velocity Structure from Interface Waves at Two Deep Water Sites in the Pacific Ocean
The shear wave velocity structure of two deep ocean sites has been studied by detonating explosives on the ocean floor and examining the slowly...
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Shear Waves in Marine Sediments — Bridging the Gap from Theory to Field Applications
The relationship between primitive variables such as porosity and mean grain size and the velocity and attenuation of shear waves propagating in a...
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Estimation of Geoacoustic Properties by Inversion of Acoustic Field Data
The reconstruction of a geoacoustic model of the ocean bottom from acoustic field data is an important inverse problem in ocean acoustics. This paper...
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Sediment Shear Waves: A Comparison of In Situ and Laboratory Measurements
In recent years, scientists from such diverse fields as geophysics, seafioor engineering, sedimentology, soil mechanics, and underwater acoustics...
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Wave Propagation in a Borehole
In full waveform acoustic logging, a pressure source generates various types of elastic waves propagating down the borehole. These waves, because...
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Laboratory Studies on Pulsed Leaky Rayleigh Wave Components in a Water Layer Over a Solid Bottom
Laboratory experimental results are presented demonstrating the existence of multiple pulsed leaky Rayleigh wave components in a liquid layer over a...
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In Situ Measurements of Shear-Wave Velocity in Ocean Sediments
This paper presents shear-wave results from the Northeast Atlantic and from the Norwegian Sea. In the first case a link was established between...
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Spatial Variability in Ground Motion: Effects of Material Heterogeneity in Seafloor Sediments
Seismo-acoustic experiments in the Ligurian Sea were used to test the potential of interface waves for probing the lateral fine structure of...
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Shear-Wave Anisotropy in Marine Sediments Around Britain from Surface Sources
Land-based seismometer recordings of shallow underwater explosions in offshore areas exhibit,in some cases,distinctive long,slow(<1.0 km/s),dispersed...
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A Seismo-Acoustic Finite Element Model for Underwater Acoustic Propagation
The finite element technique can provide an accurate description of the physics of wave propagation in inhomogeneous media. The authors have...
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Sediment Q β from Spectral Ratios of Converted Shear Reflections
Spectral ratios of the basement-converted shear reflections PS and PSSS on refraction seismograms are used to estimate the sediment shear quality...
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Comparison of Techniques for Shear Wave Velocity and Attenuation Measurements
In order to support ocean acoustic modelling and sonar performance prediction, it is necessary to acquire geoacoustic data on sediment structure. The...
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Constraints on Shear Velocities in Deep-Ocean Sediments as Determined from Deep-Tow Multichannel Seismic Data
A method is presented for constraining shear velocity estimates that is based on a frequency domain versus offset (or, equivalently, grazing angle)....