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  • 1
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    Source mechanism of volcanic tremor: Fluid-driven crack models and their application to the 1963 Kilauea eruption (1977)
    In:  J. Volcanol. Geotherm. Res., Tokyo, Inst. f. Theoret. Geodäsie, vol. 2, no. 3, pp. 259-287
    Details
    Publication Date: 1977
    Keywords: Source ; Seismology ; Volcanology ; Fluids ; cracks and fractures (.NE. fracturing) ; Hawaii ; Modelling ; Rock mechanics ; JVGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Observations of long period earthquakes accompanying hydraulic fracturing (1986)
    In:  Geophys. J. R. astr. Soc., Warszawa, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 13, no. 3, pp. 149-152, pp. 2121
    Details
    Publication Date: 1986
    Keywords: Hydraulic fracturing ; Seismicity ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Determination of fault planes at Coalinga, California, by analysis of patterns in aftershock locations (1989)
    In:  J. Geophys. Res., London, Am. Soc. Mech. Eng., vol. 94, no. B9, pp. 7496-7506, pp. B09401, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1989
    Keywords: Seismicity ; Fault zone ; Fault plane solution, focal mechanism ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Identifying the plane of slip for a fault plane solution from clustering of locations of nearby earthquakes (1990)
    In:  Geophys. Res. Lett., London, Am. Soc. Mech. Eng., vol. 17, no. B9, pp. 969-972, pp. B09401, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1990
    Keywords: Fault plane solution, focal mechanism ; Location ; Seismology ; GRL
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Separation of scattering and intrinsic attenuation for the Kanto-Tokai region, Japan, using measurements of S-wave energy versus hypocentral distance (1992)
    In:  Geophys. J. Int., London, Am. Soc. Mech. Eng., vol. 108, no. B9, pp. 787-800, pp. B09401, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1992
    Keywords: Absorption ; Seismology ; Scattering ; Attenuation ; Shear waves ; Energy (of earthquakes) ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Coda (2003)
    In:  Pure and Applied Geophysics, London, Am. Soc. Mech. Eng., vol. 160, no. 3-4, pp. 541-554, pp. B09401, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 2003
    Keywords: Seismology ; Review article ; Wave propagation ; PAG
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    BIBLIOGRAPHY SEISMOLOGY
  • 7
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    Quantitative analysis of long-period events recorded during hydrofracture experiments at Fenton Hill, New Mexico (1990)
    In:  J. Geophys. Res., Tokyo, Terra Scientific Publishing Company, vol. 95, no. B13, pp. 21871-21884, pp. L07608, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1990
    Keywords: Low frequency ... ; Data analysis / ~ processing ; Hydraulic fracturing ; Borehole geophys. ; Rock mechanics ; meta-stable ; JGR ; 8135 ; Tectonophysics: ; Hydrothermal ; systems ; (8424) ; 9350 ; Information ; Related ; to ; Geographic ; Region: ; North ; America
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    BIBLIOGRAPHY SEISMOLOGY
  • 8
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    Recent advances and trends in subsea technologies and seafloor properties characterization (2013)
    Society of Exploration Geophysicists (SEG)
    Details
    Publication Date: 2013-09-27
    Description: Following the 2012 SEG Annual Meeting in Las Vegas, the SEG Research Committee sponsored a post-convention research workshop on subsea technologies, in general, and on seafloor characterization in particular. The goal of the workshop was to share experiences in acquisition, processing and applications of geotechnical and geophysical measurements for seafloor property characterization. This includes: To help geophysicists in better understanding geotechnical seafloor measurements, e.g., when and how they are collected as well as their actual field applications; To help geotechnical specialists in better understanding geophysical seafloor measurements, how they are derived, and their importance for accurate seismic waveform modeling and inversion; To discuss technology and application trends, and how the geophysical community can participate in the fast-growing market for subsea operations in the oil and gas industry.
    Print ISSN: 1070-485X
    Electronic ISSN: 1938-3789
    Topics: Geosciences
    Published by Society of Exploration Geophysicists (SEG)
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    PAPER CURRENT
  • 9
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    Subsurface polarimetric migration imaging for full polarimetric ground-penetrating radar (2015)
    Oxford University Press
    Details
    Publication Date: 2015-07-03
    Description: Polarization is a property of electromagnetic wave that generally refers to the locus of the electric field vector, which can be used to characterize surface properties by polarimetric radar. However, its use has been less common in the ground-penetrating radar (GPR) community. Full polarimetric GPR data include scattering matrices, by which the polarization properties can be extracted, at each survey point. Different components of the measured scattering matrix are sensitive to different types of subsurface objects, which offers a potential improvement in the detection ability of GPR. This paper develops a polarimetric migration imaging method. By merging the Pauli polarimetric decomposition technique with the Krichhoff migration equation, we develop a polarimetric migration algorithm, which can extract three migrated coefficients that are sensitive to different types of objects. Then fusing the three migrated coefficients, we can obtain subsurface colour-coded reconstructed object images, which can be employed to interpret both the geometrical information and the scattering mechanism of the subsurface objects. A 3-D full polarimetric GPR data set was acquired in a laboratory experiment and was used to test the method. In the laboratory experiment, four objects—a scatterer, a ball, a plate and a dihedral target—were buried in homogeneous dry sand under a flat ground surface. By merging the reconstructed image with polarization properties, we enhanced the subsurface image and improved the classification ability of GPR.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 10
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    Synthesis of wavelet envelope in 2-D random media having power-law spectra: comparison with FD simulations (2016)
    Oxford University Press
    Details
    Publication Date: 2016-08-27
    Description: The envelope broadening and the peak delay of the S -wavelet of a small earthquake with increasing travel distance are results of scattering by random velocity inhomogeneities in the earth medium. As a simple mathematical model, Sato proposed a new stochastic synthesis of the scalar wavelet envelope in 3-D von Kármán type random media when the centre wavenumber of the wavelet is in the power-law spectral range of the random velocity fluctuation. The essential idea is to split the random medium spectrum into two components using the centre wavenumber as a reference: the long-scale (low-wavenumber spectral) component produces the peak delay and the envelope broadening by multiple scattering around the forward direction; the short-scale (high-wavenumber spectral) component attenuates wave amplitude by wide angle scattering. The former is calculated by the Markov approximation based on the parabolic approximation and the latter is calculated by the Born approximation. Here, we extend the theory for the envelope synthesis of a wavelet in 2-D random media, which makes it easy to compare with finite difference (FD) simulation results. The synthetic wavelet envelope is analytically written by using the random medium parameters in the angular frequency domain. For the case that the power spectral density function of the random velocity fluctuation has a steep roll-off at large wavenumbers, the envelope broadening is small and frequency independent, and scattering attenuation is weak. For the case of a small roll-off, however, the envelope broadening is large and increases with frequency, and the scattering attenuation is strong and increases with frequency. As a preliminary study, we compare synthetic wavelet envelopes with the average of FD simulation wavelet envelopes in 50 synthesized random media, which are characterized by the RMS fractional velocity fluctuation = 0.05, correlation scale a  = 5 km and the background wave velocity V 0 = 4 km s –1 . We use the radiation of a 2 Hz Ricker wavelet from a point source. For all the cases of von Kármán order  = 0.1, 0.5 and 1, we find the synthetic wavelet envelopes are a good match to the characteristics of FD simulation wavelet envelopes in a time window starting from the onset through the maximum peak to the time when the amplitude decreases to half the peak amplitude.
    Keywords: Seismology
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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