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• {{#category_index:C|converted wave}} ...blique incidence on an interface. Since mode conversion is small for small incident angles, converted waves become more prominent as the angle of incidence (an
4 KB (533 words) - 11:20, 19 September 2020
• ...ident shear waves<ref>Crampin, S., 1985. Evaluation of anisotropy by shear-wave splitting: GEOPHYSICS, 50(1), pp. 142-152.</ref>.
842 bytes (118 words) - 13:43, 21 September 2020
• ...rfect wave guides. <b>4</b>. Coherent noise produced by energy bouncing at incident angles smaller than the critical angle within beds that act as waveguides f
893 bytes (132 words) - 01:55, 7 November 2017
• For an incident P-wave, the angle ...P-wave velocity in the incident medium and ''V''<sub>''S''2</sub> is the S-wave velocity in the second medium.
422 bytes (64 words) - 17:28, 3 November 2017
• {{#category_index:S|shear-wave splitting}} ...gh they are not necessarily orthogonal to the propagation direction). An S-wave of arbitrary polarization entering such a region in a direction other than
2 KB (331 words) - 13:04, 12 September 2020
• ...f layers 1, 2, and ''V''<sub>''S''1</sub>, ''V''<sub>''S''2</sub> is the S-wave velocity in layers 1, 2. Note the minus sign (the opposite sign convention ...in reflectivity, depending on the polarization (SH or SV) of the incident wave; the formula (for isotropic media) are given in Aki and Richards. But, sinc
2 KB (249 words) - 00:02, 20 September 2020
• ...e amplitude of a wave transmitted through an interface to that of the wave incident upon it. This ratio can be greater than one. <b>2</b>. A measure of the amplitude of a wave passing through an interface restricted to the case of normal incidence.
1 KB (185 words) - 19:25, 11 August 2017
• ...transmitted wave may be either smaller or larger than that of the incident wave and still involve loss of energy.
318 bytes (47 words) - 19:33, 11 August 2017
• ...terface.png|thumb|Diagram showing the mode conversions that occur when a P-wave reflects off an interface at non-normal incidence]] ...hat describe the partitioning of [[Special:MyLanguage/seismic wave|seismic wave]] energy at an interface, typically a boundary between two different layers
9 KB (1,422 words) - 20:35, 19 September 2020
• ...(<b>d</b>) A number of types of head waves are possible from an incident P-wave depending on relative velocities, but usually only the P<sub>2</sub>P<sub>1
585 bytes (101 words) - 16:37, 20 December 2011
• ...edia; the wave changes direction such that for either incident P-wave or S-wave, ...ath> or $\sin_{S2}$ exceeds 1 as given by this equation, a head wave will be generated.
1 KB (209 words) - 12:19, 19 November 2014
• ...exact solution for [[C-wave]] reflectivity (for the case of a plane P-wave incident upon an planar boundary between isotropic media) is given by Aki and Richar ...d before making an image using both sides<ref>Thomsen, L., 1999. Converted-Wave Reflection Seismology over inhomogeneous, anisotropic media, GEOPHYSICS, 64
3 KB (387 words) - 15:46, 20 September 2020
• ...s shown in the figure, are scattered in all directions with respect to the incident ray ''BA''. Evidence exists on many seismic records that this process, whic ...on of a wavefront from either a mechanical wave or from an electromagnetic wave is obstructed in some way. If in the course of encountering an obstacle, ei
15 KB (2,213 words) - 13:57, 22 April 2021
• ...As we walk along the beach line, we see a wavefront different from a plane wave. The gap on the storm barrier has acted as a secondary source and generated ...ent, we find that Huygens’ secondary source responds to a plane incident wave and generates a semicircular wavefront in the ''x − z'' plane. The respon
5 KB (705 words) - 13:10, 22 September 2014
• :''Assumption 2''. The source generates a compressional plane wave that impinges on layer boundaries at normal incidence. Under such circumsta ...n coefficient is the ratio of the reflected wave amplitude to the incident wave amplitude. Moreover, from its definition (equation {{EquationNote|1a}}), th
11 KB (1,590 words) - 08:01, 18 September 2014
• ...as ''I'' = ''ρv'', where ''ρ'' is density and ''v'' is the compressional-wave velocity within the layer. The instantaneous value of seismic impedance for For a vertically incident plane wave, the pressure amplitude reflection coefficient associated with an interface
59 KB (9,331 words) - 17:26, 7 October 2014
• ...ructing a slant-stack gather. Each trace in this gather represents a plane wave that propagates at a certain angle from vertical. In reality, when a dynami ...se and result in a plane wave that travels vertically downward. This plane wave reflects from an interface and is recorded by a receiver at the surface. (A
8 KB (1,301 words) - 11:42, 26 September 2014
• ...= ''x''/2 and ''D'' = ''MN'', where ''D'' is the distance along the normal-incident raypath from the point ''N'' on the reflector to the midpoint location ''M' ...occa (1981), Deregowski, S. M. and Rocca, F., 1981, Geometrical optics and wave theory for constant-offset sections in layered media: Geophys. Prosp., 29,
59 KB (9,306 words) - 14:24, 8 October 2014
• ...ten do not represent the typical refracted arrivals associated with a head wave. Therefore, neither refraction traveltime tomography ([[Topics in moveout a ...velocity gradients within the near-surface layers, the downgoing incident wave rapidly turns around before being reflected and is recorded by the receiver
6 KB (801 words) - 17:16, 9 October 2014
• ...igate their use in exploration seismology, it is imperative that we review wave propagation in elastic solids. This gives us the opportunity to appreciate ==Elastic wave theory==
18 KB (2,723 words) - 16:28, 6 October 2014

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