Results 231 to 240 of about 19,474 (278)
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Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1966
Abstract When seismic signals from impulsive sources are reflected or refracted by discrete inhomogeneities in the seismic medium, ‘arrivals’ are recorded. If, however, the number of inhomogeneities becomes large and the distance between them becomes small, then interference among the arrivals takes place and source-caused ‘noise ’ is
J. A. Hudson, L. Knopoff
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Abstract When seismic signals from impulsive sources are reflected or refracted by discrete inhomogeneities in the seismic medium, ‘arrivals’ are recorded. If, however, the number of inhomogeneities becomes large and the distance between them becomes small, then interference among the arrivals takes place and source-caused ‘noise ’ is
J. A. Hudson, L. Knopoff
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The seismic noise wavefield is not diffuse
The Journal of the Acoustical Society of America, 2012Passive seismology is burgeoning under the apparent theoretical support of diffuse acoustics. However, basic physical arguments suggest that this theory may not be applicable to seismic noise. A procedure is developed to establish the applicability of the diffuse field paradigm to a wavefield, based on testing the latter for azimuthal isotropy and ...
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Biological noise on seismic data
SEG Technical Program Expanded Abstracts 1993, 1993ABSTRACT The geophysicist increases the resolution of the subsurface by using closely-spaced detectors. Ambient noise becomes more important with the short recording arrays so as to increase the importance of biological noise.
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2019
After studying this chapter, you should be able to: Understand the various types of noise that appear in seismic images and volumes. Simulate some commonly used type of noise. Estimate noise parameters.
Abdullatif Al-Shuhail, Saleh Al-Dossary
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After studying this chapter, you should be able to: Understand the various types of noise that appear in seismic images and volumes. Simulate some commonly used type of noise. Estimate noise parameters.
Abdullatif Al-Shuhail, Saleh Al-Dossary
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Geophysics, 1968
Abstract Gaussian distribution, time scale of at least three hours, chi-square test, variance calculation on 5-minute sample, lack of stability above 2.0 Hz, possibly from instabilities in experimental ...
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Abstract Gaussian distribution, time scale of at least three hours, chi-square test, variance calculation on 5-minute sample, lack of stability above 2.0 Hz, possibly from instabilities in experimental ...
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Seismic interferometry—turning noise into signal
The Leading Edge, 2006Turning noise into useful data—every geophysicist's dream? And now it seems possible. The field of seismic interferometry has at its foundation a shift in the way we think about the parts of the signal that are currently filtered out of most analyses—complicated seismic codas (the multiply scattered parts of seismic waveforms) and background noise ...
Curtis, A. (author) +4 more
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Exploration Geophysics, 1988
Wave test seismograms from an Aramco concession area show crisscross patterns of noise which mask the reflections. The criss-cross pattern that follows the arrival of the Rayleigh wave is sometimes very strong and entirely masks any reflections that may be present. This zone is very often referred to as the 'noise cone'.
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Wave test seismograms from an Aramco concession area show crisscross patterns of noise which mask the reflections. The criss-cross pattern that follows the arrival of the Rayleigh wave is sometimes very strong and entirely masks any reflections that may be present. This zone is very often referred to as the 'noise cone'.
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Measurement of seismic noise with a laser interferometer
SPIE Proceedings, 2004Laser interferometry is one of the most sensitive methods for small displacement displacement. This technique was successfully used in several fields of physics, giving very good performances also due to the large availability of optical components and high quality and relatively low cost laser sources.
ACERNESE, Fausto +3 more
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Characterization of seismic signals and background seismic noise
The Journal of the Acoustical Society of America, 2004A variety of signal processing methodologies have been utilized in the analysis and characterization of the seismic signals and the background noise recorded by modern seismic instrumentation at the UC Berkeley Seismological Laboratory. The capabilities of seismic instrumentation have vastly improved over the past couple of decades since the advent of ...
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