Results 221 to 230 of about 1,357,139 (273)
Some of the next articles are maybe not open access.
Some interesting seismic noises
SEG Technical Program Expanded Abstracts 1984, 1984ABSTRACT This paper suggests that the identification of seismic noise increases our ability to evaluate deeper drilling targets. Seismic noise, as illustrated in basic, unstacked data, is shown to contain clues which the seismic processor may use to improve the resolution of the seismic section.
openaire +1 more source
Bulletin of the Seismological Society of America, 1962
Abstract The seismic noise spectrum in the frequency range 0.5 to 31.5 cycles per second is presented graphically for a number of sites over a wide geographical range. Except for a small anomalous effect near 2 or 3 cycles per second, the ground particle motion curves are observed to decrease smoothly with increasing frequency at a rate ...
G. E. Frantti +2 more
openaire +1 more source
Abstract The seismic noise spectrum in the frequency range 0.5 to 31.5 cycles per second is presented graphically for a number of sites over a wide geographical range. Except for a small anomalous effect near 2 or 3 cycles per second, the ground particle motion curves are observed to decrease smoothly with increasing frequency at a rate ...
G. E. Frantti +2 more
openaire +1 more source
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 ...
openaire +3 more sources
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
openaire +1 more source
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
openaire +1 more source
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.
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
Seismic noise and gravity-gradient noise
2019Gravity gradient noise is generated by mass density changes through fluctuating gravity fields. Ambient seismic noise generated by microseismism, wind or of antropogenic origin is a possible source of such fluctuations. This work gives an overview of the impact of seismic noise and gravity-gradient noise on existing gravitational-wave detectors, and ...
openaire +2 more sources
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 ...
openaire +1 more source
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 ...
openaire +1 more source
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
openaire +3 more sources
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'.
openaire +1 more source
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'.
openaire +1 more source