Ocean-bottom ultralow-frequency (ULF) seismo-acoustic ambient noise: 0.002 to 0.4 Hz

Sutton, George H.; Barstow, N.

doi:10.1121/1.399328

Cited by 43 publications

(27 citation statements)

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“…Webb, 1997). Notably, such an experiment was conducted in San Francisco Bay in the late 1960's (Sutton and Barstow, 1990). However, measurements from 3 component broadband seismometers have been few.…”

Section: Scientific Motivationsmentioning

confidence: 99%

MOISE: A pilot experiment towards long term sea-floor geophysical observatories

et al. 2014

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We describe the scientific purposes and experimental set-up of an international deployment of a 3 component broadband seismometer package on the ocean floor in Monterey Bay which took place during the summer of 1997. Highlights of this experiment were the installation, performed using a remotely operated vehicle (ROV), the underwater connection of the different components of the package, and the successful retrieval of 3 months of broadband seismic and auxiliary data. Examples of recordings of teleseisms and regional earthquakes are presented and the background noise characteristics are discussed, in comparison with those of near-by broadband land sites, current-meter data from the vicinity of the ocean bottom package, as well as pressure data from deeper ocean sites.

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Section: Scientific Motivationsmentioning

confidence: 99%

MOISE: A pilot experiment towards long term sea-floor geophysical observatories

et al. 2014

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“…Previous measurements of noise in the deep ocean have been few, and the results have been broadly consistent with all the above theories [6,7,8,9] This work will examine the model developed by Cato [12] for an infinite depth ocean and will present the derivation of that model in detail. Using the SWADE directional wave spectra cls inputs, we will estimate the resulting ax:oustic source level.…”

Section: Introductionmentioning

confidence: 92%

Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion

Lindstrom¹

1991

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“…For a plane wave in a uniform acoustic medium the ratio of pressure to velocity is simply the acoustic impedance (density times phase velocity) (Jensen et al, 1994). For interface waves at the seafloor, however, the relationship between pressure and particle velocity is more complicated and involves phase shifts depending on the type of interface waves (Rauch, 1980;Sutton and Barstow, 1990).…”

Section: Scientific Objectivesmentioning

confidence: 99%

Ocean Bottom Seismometer Augmentation in the North Pacific (OBSANP) - cruise report

Stephen¹,

Worcester²,

Udovydchenkov³

et al. 2014

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The Ocean Bottom Seismometer Augmentation in the North Pacific Experiment (OBSANP, June-July, 2013, R/V Melville) addresses the coherence and depth dependence of deep-water ambient noise and signals. During the 2004 NPAL Experiment in the North Pacific Ocean, in addition to predicted ocean acoustic arrivals and deep shadow zone arrivals, we observed "deep seafloor arrivals" (DSFA) that were dominant on the seafloor Ocean Bottom Seismometer (OBS) (at about 5000m depth) but were absent or very weak on the Distributed Vertical Line Array (DVLA) (above 4250m depth). At least a subset of these arrivals correspond to bottomdiffracted surface-reflected (BDSR) paths from an out-of-plane seamount. BDSR arrivals are present throughout the water column, but at depths above the conjugate depth are obscured by ambient noise and PE predicted arrivals. On the 2004 NPAL/LOAPEX experiment BDSR paths yielded the largest amplitude seafloor arrivals for ranges from 500 to 3200km. The OBSANP experiment tests the hypothesis that BDSR paths contribute to the arrival structure on the deep seafloor even at short ranges (from near zero to 4-1/2CZ). The OBSANP cruise had three major research goals: a) identification and analysis of DSFA and BDSR arrivals occurring at short (1/2CZ) ranges in the 50 to 400Hz band, b) analysis of deep sea ambient noise in the band 0.03 to 80Hz, and c) analysis of the frequency dependence of BR and SRBR paths. On OBSANP we deployed a 32 element VLA from 12 to 1000m above the seafloor, eight short-period OBSs and four long-period OBSs and carried out a 15day transmission program using a J15-3 acoustic source. WHOI -2014 -03 OBSANP -Cruise Report

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Ocean-bottom ultralow-frequency (ULF) seismo-acoustic ambient noise: 0.002 to 0.4 Hz

Cited by 43 publications

References 0 publications

MOISE: A pilot experiment towards long term sea-floor geophysical observatories

MOISE: A pilot experiment towards long term sea-floor geophysical observatories

Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion

Ocean Bottom Seismometer Augmentation in the North Pacific (OBSANP) - cruise report

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