The effect of Yucca Fault on seismic wave propagation

1971 ◽  
Vol 61 (3) ◽  
pp. 697-706 ◽  
Author(s):  
Walter W. Hays ◽  
John R. Murphy
Keyword(s):  
Wave Propagation ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Low Frequency ◽  
Test Site ◽  
Seismic Wave Propagation ◽  
Nevada Test Site ◽  
Basement Rocks ◽  
Geological Discontinuity ◽  
Frequency Components

abstract Yucca Fault is a major structural feature of Yucca Flat, a well-known geological province of the Nevada Test Site (NTS). The trace of the Fault extends north-south over a distance of about 32 km. The fault plane is nearly vertical and offsets Quaternary alluvium, Tertiary volcanic tuffs and pre-Cenozoic basement rocks (quartzites, shales and dolomites) with relative down displacement of several hundred feet on the east side of the fault. Data recorded from the CUP underground nuclear detonation in Yucca Flat typify the effect of the fault on near-zone (i.e., inside 10 km) seismic wave propagation. The effect of the fault is frequency dependent. It affects the frequency components (3.0, 5.0, 10.0 Hz) of the seismic waves which have characteristic wavelengths in the order of the geological discontinuity. Little or no effect is observed for low-frequency components (0.5, 1.0 Hz) which have wave-lengths exceeding the dimensions of the geological discontinuity. The effect of the fault does not represent a safety problem.

A NOTE ON THE PROPAGATION OF SEISMIC WAVES

Geophysics ◽  
1937 ◽  
Vol 2 (4) ◽  
pp. 319-328 ◽  
Author(s):  
Morris Muskat
Keyword(s):  
Wave Propagation ◽  
Power Series ◽  
Conventional Method ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Seismic Wave Propagation ◽  
Time Distance

It is suggested that in the computation of theoretical time‐distance curves for seismic wave propagation a more tractable form of analysis is obtained if the depth is expressed as a power series in the velocity than when the converse but more conventional method is used. Several illustrations of this procedure are given.

scholarly journals A Preconditioned 3-D Multi-Region Fast Multipole Solver for Seismic Wave Propagation in Complex Geometries

2012 ◽  
Vol 11 (2) ◽  
pp. 594-609 ◽  
Author(s):  
S. Chaillat ◽  
J.F. Semblat ◽  
M. Bonnet
Keyword(s):  
Wave Propagation ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Plane Waves ◽  
Seismic Wave Propagation ◽  
Boundary Element Methods ◽  
Complex Geometries ◽  
Fast Multipole ◽  
Geological Structures ◽  
Actual Configuration

AbstractThe analysis of seismic wave propagation and amplification in complex geological structures requires efficient numerical methods. In this article, following up on recent studies devoted to the formulation, implementation and evaluation of 3-D single- and multi-region elastodynamic fast multipole boundary element methods (FM-BEMs), a simple preconditioning strategy is proposed. Its efficiency is demonstrated on both the single- and multi-region versions using benchmark examples (scattering of plane waves by canyons and basins). Finally, the preconditioned FM-BEM is applied to the scattering of plane seismic waves in an actual configuration (alpine basin of Grenoble, France), for which the high velocity contrast is seen to significantly affect the overall efficiency of the multi-region FM-BEM.

Dual simulations of fluid flow and seismic wave propagation in a fractured network: Effects of changes in pore pressure on signature of seismic waves

2003 ◽  
Author(s):  
S. Vlastos ◽  
M. Schoenberg ◽  
B. Maillot ◽  
I. G. Main ◽  
E. Liu ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Fluid Flow ◽  
Pore Pressure ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Network Effects ◽  
Seismic Wave Propagation ◽  
Fractured Network

scholarly journals Modelling high-frequency seismograms at ocean bottom seismometers: effects of heterogeneous structures on source parameter estimation for small offshore earthquakes and shallow low-frequency tremors

2020 ◽  
Vol 223 (3) ◽  
pp. 1708-1723
Author(s):  
Shunsuke Takemura ◽  
Suguru Yabe ◽  
Kentaro Emoto
Keyword(s):  
Wave Propagation ◽  
Parameter Estimation ◽  
Seismic Wave ◽  
High Frequency ◽  
Source Parameters ◽  
Low Frequency ◽  
Accretionary Prism ◽  
Seismic Wave Propagation ◽  
Source Parameter ◽  
Seismic Events

SUMMARY The source characteristics of offshore seismic events, especially regular (or fast) and slow earthquakes, can provide key information on their source physics and frictional conditions at the plate boundary. Due to strong 3-D heterogeneities in offshore regions, such as those relating to sea water, accretionary prism and small-scale velocity heterogeneity, conventional methods using a 1-D earth model may mis-estimate source parameters such as the duration and radiation energy. Estimations could become severe inaccuracies for small offshore seismic events because high-frequency (>1 Hz) seismograms, which are strongly affected by 3-D heterogeneities, are only available for analysis because of their signal-to-noise ratio. To investigate the effects of offshore heterogeneities on source parameter estimation for small seismic events, we analysed both observed and simulated high-frequency seismograms southeast off the Kii Peninsula, Japan, in the Nankai subduction zone. Numerical simulations of seismic wave propagation using a 3-D velocity structure model clarified the effects of each heterogeneity. Comparisons between observations and model simulations demonstrated that the thick low-velocity accretionary prism has significant effects on high-frequency seismic wave propagation. Especially for shallow low-frequency tremors occurring at depths just below the accretionary prism toe, seismogram durations are significantly broader than an assumed source duration, even for stations with epicentral distances of approximately 10 km. Spindle-shape seismogram envelopes were observed even at such close stations. Our results suggest that incorporating 3-D heterogeneities is necessary for practical estimation of source parameters for small offshore events.

Elastic wave propagation in heterogeneous media

1970 ◽  
Vol 60 (3) ◽  
pp. 769-784 ◽  
Author(s):  
Paul R. Beaudet
Keyword(s):  
Wave Propagation ◽  
Wave Equation ◽  
Seismic Waves ◽  
Heterogeneous Media ◽  
Heterogeneous Medium ◽  
Test Site ◽  
Nuclear Test ◽  
Field Observations ◽  
Nevada Test Site ◽  
Test Program

Abstract The wave equation is solved for the ensemble average of particle displacements produced by an explosion. The explosion is assumed to occur in a finite cavity in an infinite heterogeneous medium. The solution is applied to the seismic waves generated by an underground nuclear detonation. Field observations from the underground nuclear test program at the Nevada Test Site are in qualitative agreement with the theory.

scholarly journals High-frequency simulations of global seismic wave propagation using SPECFEM3D_GLOBE on 62K processors

2008 ◽  
Author(s):  
Laura Carrington ◽  
Dimitri Komatitsch ◽  
Michael Laurenzano ◽  
Mustafa M. Tikir ◽  
David Michea ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Seismic Wave ◽  
High Frequency ◽  
Seismic Wave Propagation

Seismic wave propagation in stratified media

1984 ◽  
Vol 34 (3) ◽  
pp. 204-205
Author(s):  
G. Müller
Keyword(s):  
Wave Propagation ◽  
Seismic Wave ◽  
Seismic Wave Propagation ◽  
Stratified Media

Seismic Wave Propagation in Composite Elastic Media

2009 ◽  
Vol 79 (1) ◽  
pp. 135-148 ◽  
Author(s):  
T. J. T. Spanos
Keyword(s):  
Wave Propagation ◽  
Seismic Wave ◽  
Seismic Wave Propagation ◽  
Elastic Media
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