Model study of explosion-generated Rayleigh waves in a half space

1964 ◽  
Vol 54 (2) ◽  
pp. 475-484
Author(s):  
I. N. Gupta ◽  
C. Kisslinger
Keyword(s):  
Rayleigh Wave ◽  
Half Space ◽  
Rayleigh Waves ◽  
Radial Component ◽  
Two Dimensional ◽  
Source Depth ◽  
Dimensional Model ◽  
Retrograde Motion ◽  
Model Study ◽  
Two Dimensional Model

ABSTRACT The Rayleigh waves generated by an explosion on or in the interior of a two-dimensional model show that the source acts as a downward impulse when the shot is on or just below the surface, and as a buried source of compression for deeper shots. The seismograms are in agreement with established theory for the line source on or in a half-space. The source depth corresponding to the reversal of polarity of the Rayleigh wave is small, and appears to be equal to the radius of the zone of inelastic failure around the shot. The polarity reversal is a true indication of a change in the mechanism of Rayleigh wave generation, and is not related to the change from retrograde motion at the free surface to prograde motion in the interior associated with the change in sign of the radial component at depth.

TRANSMISSION AND REFLECTION OF RAYLEIGH WAVES AT CORNERS

Geophysics ◽  
1958 ◽  
Vol 23 (2) ◽  
pp. 253-266 ◽  
Author(s):  
J. Cl. de Bremaecker
Keyword(s):  
Surface Wave ◽  
Rayleigh Wave ◽  
Rayleigh Waves ◽  
Body Waves ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Reflection And Transmission ◽  
Two Dimensional Model ◽  
Model Seismology ◽  
Transmission And Reflection

The methods of two dimensional model seismology were used to investigate the phenomena occurring when a Rayleigh wave is incident upon a corner whose angle is comprised between 0° and 180°. The wave bends its path only for angles between 130° and 180°. For smaller angles large and abrupt variations in reflection and transmission occur; the wave travels to the extremity of the corner and never “cuts corners”; only about 50 percent of the energy of the indicent surface wave is preserved as such, the rest goes into body waves; for a 90° corner the proportion is about 23 percent in P and 26 percent in S, with sharply preferential angles of incidence. The percentages given were found for a “plate Poisson’s ratio” of 0.17.

Thermal structure of the Venus ionosphere: A two-dimensional model study

1986 ◽  
Vol 13 (1) ◽  
pp. 10-13 ◽  
Author(s):  
R. C. Whitten ◽  
R. P. Singhal ◽  
W. C. Knudsen
Keyword(s):  
Thermal Structure ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Model Study ◽  
Two Dimensional Model

RAYLEIGH‐WAVE MOTION IN AN ELASTIC HALF‐SPACE

Geophysics ◽  
1965 ◽  
Vol 30 (1) ◽  
pp. 97-101 ◽  
Author(s):  
W. A. Sorge
Keyword(s):  
Rayleigh Wave ◽  
Half Space ◽  
Rayleigh Waves ◽  
Wave Motion ◽  
Elastic Half Space ◽  
Two Dimensional ◽  
Seismic Model

Measurements made on Rayleigh waves below the surface of a simulated elastic half‐space confirm in detail the behavior predicted by theory. These measurements, made by means of a two‐dimensional seismic model, show that the amplitude of the Rayleigh wave falls off rapidly with increasing depth.

Implications of smaller concentrations of stratospheric OH: A two-dimensional model study of ozone perturbations

1981 ◽  
Vol 15 (9) ◽  
pp. 1583-1589 ◽  
Author(s):  
R.C. Whitten ◽  
W.J. Borucki ◽  
H.T. Woodward ◽  
L.A. Capone ◽  
C.A. Riegel ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Dimensional Model ◽  
Model Study ◽  
Two Dimensional Model

Dynamics of the Venus ionosphere: A two-dimensional model study

Icarus ◽  
1984 ◽  
Vol 60 (2) ◽  
pp. 317-326 ◽  
Author(s):  
R.C. Whitten ◽  
P.T. McCormick ◽  
D. Merritt ◽  
K.W. Thompson ◽  
R.R. Brynsvold ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Dimensional Model ◽  
Model Study ◽  
Two Dimensional Model
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