The Ocean Sub-Bottom Seismometer System Installed in Deep Sea Drilling Project Hole 581C, Leg 88: A Technical Review

Byrne, Donn; Harris, David W.; Duennebier, F. K.; Cessaro, R. K.

doi:10.2973/dsdp.proc.88.106.1987

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…The northwestern OSS was developed in the Hawaiian Institute of Geophysics. Installed in September 1982 to work at least till May 1983, it had a recording pass-band from 0.03 to 40Hz (Byrne et al 1987;Harris et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Spectra of ocean-bottom seismic noise in the 0.01-10 Hz range

Dozorov

Soloviev

1991

Geophysical Journal International

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In 1988, short-term (duration 18 hr each) ocean-bottom seismic noise recordings were made in the frequency range of 0.01-10 Hz at the depth of 900-1400 m in the Atlantic ocean. There were two study areas: in the Canary upwelling and on the Reikjanes ridge. T h e spectral curves obtained for these two areas show the existence of a minimum in the frequency range of 0.05-0.10Hz (i.e. in the period range of 10-20 s) together with a maximum reflecting the domain of storm microseisms (0.1-1 Hz). We recommend the use of this minimum for regular recording of strong remote earthquakes and, especially, for surface wave dispersion studies t o obtain velocity sections of the oceanic crust and upper mantle.

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Section: Introductionmentioning

confidence: 99%

Spectra of ocean-bottom seismic noise in the 0.01-10 Hz range

Dozorov

Soloviev

1991

Geophysical Journal International

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“…The equilibrium temperature might be 10°C or more higher (Byrne et al, 1987), but preliminary estimates suggest values of 5° to 6°C, placing the true transformation temperature at about 42° to 43°C in rocks having about 15% silica. This value is in good agreement with previous estimates for the transformation in a non-uplifted Pliocene sequence offshore California (Keller and Isaacs, 1985).…”

Section: Silica Diagenesismentioning

confidence: 96%

Site 798

1990

Proceedings of the Ocean Drilling Program

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“…1). See Duennebier & Blackinton (1983) and Byrne et al (1987) for details of the instrumentation and recording system.…”

Section: A T a A N D A N A L Y S I Smentioning

confidence: 99%

Investigation for anisotropic attenuation in the Pacific

Butler

Cessaro

1990

Geophysical Journal International

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Anisotropic attenuation arises through preferential orientation of dislocations, crystals, and scattering bodies. As seismic energy loss is an exponential function of distance, whereas traveltime is a linear function, attenuation anisotropy is potentially as important as velocity anisotropy. In an examination for anisotropic attenuation, oceanic S-waves, So, were analysed from 10 earthquakes near Hokkaido, Japan which were recorded naturally rotated into SV and SH components of motion at the HIG borehole seismometer in the northwest Pacific, OSS IV. Some evidence for velocity polarization anisotropy is seen. The observed W / S H amplitude ratios, which vary from $ to 2, limit the possible contribution of scattering between orthogonal components of motion. The effect of local scattering of SV into SH and vice versa, which contaminates the measurement, can be estimated from observed transverse energy on P-waves. In the frequency band with a good signalto-noise ratio, 3 to 20Hz, the So phases have propagated about 900-6000 wavelengths. Spectral ratios of SV over SH are formed for each event. Frequency independent source, propagation, and receiver effects are removed by normalizing the spectra. The normalized spectral ratios are then stacked. The resultant stacked data are essentially flat, varying by less than 15 per cent about their geometric mean with no frequency-dependent trend. The results are consistent with Q values of SV polarized shear waves within 5 per cent of those for SH polarized shear waves.

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The Ocean Sub-Bottom Seismometer System Installed in Deep Sea Drilling Project Hole 581C, Leg 88: A Technical Review

Cited by 10 publications

References 2 publications

Spectra of ocean-bottom seismic noise in the 0.01-10 Hz range

Spectra of ocean-bottom seismic noise in the 0.01-10 Hz range

Site 798

Investigation for anisotropic attenuation in the Pacific

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