# Search results

Results 1 – 100 of 234

#### Search in namespaces:

 (Main) Talk User User talk SEG Wiki SEG Wiki talk File File talk
 MediaWiki MediaWiki talk Template Template talk Help Help talk Category Category talk
 Property Property talk Form Form talk Concept Concept talk smw/schema smw/schema talk
 Rule Rule talk Widget Widget talk Campaign Campaign talk Dictionary DictionaryTalk
 TimedText TimedText talk Translations Translations talk
• ...l&#x2202; nat&#x2019; ik) The locus for a given traveltime of wave energy reflected or refracted at a surface. Wavefronts are aplanatic surfaces for reflection
908 bytes (126 words) - 20:55, 4 March 2018
• ...cuum, 2.997 925&#x00D7;10<sup>8</sup>&#x0020;m/s. <b>3</b>. A seismic wave reflected at the Earth&#x2019;s mantle-core boundary.
320 bytes (48 words) - 14:54, 29 January 2017
• {{#category_index:C|channel wave}} ...Special:MyLanguage/Dictionary:Fig_C-2|C-2]]. A channel is also called a <b>wave guide</b> and channel waves are also called <b>guided waves</b> and <b>norm
2 KB (312 words) - 10:31, 11 July 2017
• {{#category_index:C|converted wave}} ...y as a [[Dictionary:P-wave|P-wave]] and partly as an [[Dictionary:S-wave|S-wave]], being converted from one to the other upon reflection or refraction at o
4 KB (533 words) - 11:20, 19 September 2020
• This model is a consequence of the concept that each reflected wave causes its own effect at each geophone (or hydrophone) independent of what
863 bytes (134 words) - 12:52, 4 December 2017
• ...eflector mainly effective in generating a reflection since, for a harmonic wave, the effects of successive zones generally cancel each other. A nomogram fo
1 KB (207 words) - 18:05, 14 November 2017
• ...2</b>. Seismic wave energy falling on a reflector and thus available to be reflected. It depends on source-receiver configuration and velocity distribution, esp
541 bytes (70 words) - 23:22, 18 January 2017
• ...the first arrival of the downgoing wave is time-coincident with an upgoing wave.&#x2019;&#x2019;
609 bytes (91 words) - 12:16, 7 March 2017
• ...e picked with reasonable certainty. Depends on the energy of the reflected wave, the presence of noise, and the processing to which the data are subjected
550 bytes (77 words) - 21:53, 23 November 2017
• {{#category_index:R|reflected refraction}} <b>1</b>. Head-wave energy that has been reflected or diffracted back from a discontinuity in a refractor, such as a fault. Se
1 KB (201 words) - 21:54, 18 January 2020
• The energy or wave from a seismic source that has been reflected (returned) from an acoustic-impedance contrast (<b>reflector</b>) or series
705 bytes (93 words) - 13:52, 27 February 2018
• ...k and forth over only a small portion of the section so that the resulting wave blends with the primary pulse, changing its waveshape and adding a tail. Se
435 bytes (64 words) - 18:47, 27 April 2017
• {{#category_index:S|sky wave}} ...io) waves reflected from ionized layers in the ionosphere. Involved in sky-wave interference and in making radio waves receivable beyond the line-of-sight
417 bytes (47 words) - 16:08, 11 April 2019
• {{#category_index:S|sky-wave interference}} ...unset, so sky-wave interference is especially variable at these times. Sky-wave interference degrades the accuracy and range of radio-positioning systems.
484 bytes (63 words) - 23:00, 14 September 2018
• ...es the channel. (<b>e</b>) The high-frequency portion of (d), the <b>water wave</b>; its arrival is used in refraction work to determine the range. (From C
1 KB (209 words) - 21:45, 19 June 2017
• ...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
• {{#category_index:S|standing wave}} ...length intervals. Continuous-wave radio-navigation systems set up standing-wave patterns.
582 bytes (74 words) - 05:30, 1 November 2017
• {{#category_index:T|turning wave}} ...ath (for example, by an overhanging salt flank), it is called a <b>turning-wave reflection</b> (see Figure [[Special:MyLanguage/Dictionary:Fig_D-19|D-19]])
621 bytes (97 words) - 23:31, 14 April 2019
• A vibroseis field record consists of the superposition of many long reflected wavetrains and is generally uninterpretable because of the extensive overla The original Vibroseis vibrated vertically; it is sometimes be called a "P-wave" vibrator because most of the energy radiated near-vertically travels as P-
2 KB (361 words) - 23:52, 19 September 2020
• ...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
• ...es the channel. (<b>e</b>) The high-frequency portion of (d), the <b>water wave</b>; its arrival is used in refraction work to determine the range. (From C
849 bytes (136 words) - 14:40, 2 March 2018
• ...'' after the onset of the wave struck the tip of the barrier. Shown is the reflected wavefront, the wavefront that missed the reflector, and diffractions from t
408 bytes (64 words) - 16:29, 20 December 2011
273 bytes (40 words) - 16:36, 20 December 2011
• ...) Energy fractions for reflected P-waves as a function of density ratio; P-wave velocity contrast 1.5, Poisson's ratio 0.25. (From Tooley et al., 1965.)
864 bytes (126 words) - 11:13, 2 March 2020
• The 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 a a) makes the reflected amplitude ''zero'' at normal incidence. <br>
3 KB (387 words) - 15:46, 20 September 2020
• ...journal|last1=Robinson|first1=Enders A.|title=Transmitted deconvolution of reflected signals|journal=The Leading Edge|volume=16|issue=5|year=1997|pages=503–50 ...ite journal|last1=Robinson|first1=Enders|last2=Clark|first2=Dean|title=The wave equation|journal=The Leading Edge|volume=6|issue=7|year=1987|pages=14–17|
11 KB (1,522 words) - 15:21, 17 October 2016
• ...for his work in many areas of geophysics including in-seam seismic channel wave studies in coal. :1984 Renaming of the Rayleigh-channel wave into [[Krey-wave]]
12 KB (1,798 words) - 14:02, 28 December 2016
• ...alog magnetic recording and its associated analog processing. This work is reflected in some of his early papers in EAGE's journal, Geophysical Prospecting, and ...late 1950s Nigel addressed the topic of the earth's effects on the seismic wave form. One of his papers, "Why all this interest in the shape of the pulse?"
16 KB (2,345 words) - 11:23, 31 August 2020
• ...earth and of a receiver and recorder that subsequently recorded the energy reflected, refracted, and scattered from within the subsurface. The invention was pro ...record facts that contradicted the fundamental results of classic elastic wave theory. When an elastics pulse is applied to the earth, the result at a dis
4 KB (600 words) - 15:20, 17 October 2016
• ...ated with Dix on were related to free surface reflections and the Rayleigh wave. In 1946 Ethel Ward McLemore left the United Geophysical Company to work wi ...ime of increasing specialization, Ethel has remained a generalist. This is reflected in her profusion of publications which have included such diverse topics as
14 KB (2,031 words) - 10:00, 5 November 2020
• interpretation, as reflected by 36 the equivalence of wave-equation, frequency-domain solutions
7 KB (1,012 words) - 11:02, 18 October 2016
• contributions are reflected in more than 100 articles in SEG publications, 16 books and 12 ...y Director of the Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy
6 KB (965 words) - 11:19, 18 October 2016
• ...potential field interferometry, imaging internal multiples from VSP, shear-wave splitting, microearthquake data, time-lapse monitoring, virtual-source acqu ...ation of the Born approximation to perturbation theory for seismic surface-wave propagation, which paved the way for the use of sensitivity kernels for fin
11 KB (1,718 words) - 17:29, 4 November 2016
• in SEG publications, a widely cited PhD thesis on plane wave depth-migration, and has recently pioneering work in finite-difference wave propagation.
5 KB (832 words) - 17:13, 5 October 2017
• wave. Using the time-distance diagrams, the traveltime curves. he He recorded the arrival of the sound wave in air and calculated
33 KB (5,439 words) - 12:07, 30 January 2019
• SEG in honoring the [http://cwp.mines.edu/:Center for Wave Phenomena], [http://geophysics.mines.edu/:Department of Geophysics], [http: reflected by the SU project. SU is used by exploration geophysicists,
6 KB (916 words) - 11:16, 10 November 2014
• SEG in honoring the [http://cwp.mines.edu: Center for Wave Phenomena], [http://geophysics.mines.edu: Department of Geophysics], [http: reflected by the SU project. SU is used by exploration geophysicists,
8 KB (1,136 words) - 03:08, 31 March 2022
• Jack published many papers in the field of wave propagation and seismic imaging. He was co-founder of the [http://cwp.mines.edu: Center for Wave Phenomena] and co-founder (with [[Shuki Ronen]])
10 KB (1,560 words) - 07:51, 11 April 2021
• '''John W. Stockwell, Jr''' is a research associate with the Center for Wave Phenomena, Colorado School of Mines. He has been the principal investigator SEG in honoring the [http://cwp.mines.edu: Center for Wave Phenomena], [http://geophysics.mines.edu: Department of Geophysics], [http:
13 KB (2,051 words) - 12:09, 18 October 2016
• [[Center for Wave Phenomena]] (CWP). The principal scientific contribution to measure wave scattering and anisotropy in natural
5 KB (772 words) - 14:29, 17 October 2016
• :''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
• ...nately to 1/''r''<sup>2</sup>, where ''r'' is the radius of the wavefront. Wave amplitude is proportional to the square root of energy density; it decays a ...ared (rms) velocity ([[normal moveout]]) of the primary reflections (those reflected only once) averaged over a survey area. Therefore, the gain function for ge
9 KB (1,329 words) - 16:09, 28 August 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
• ...e source explodes, the energy propagates at all angles (Figure 6.3-1). The reflected energy arrives at different receiver groups at different angles because of ...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
• ...t al. (1982), Treitel, S., Gutowski, P. R., and Wagner, D. E., 1982, Plane-wave decomposition of seismograms: Geophysics, 47, 1375–1401.</ref> investigat ...6_figF-1.png|{{figure number|F-1}} (a) A shot gather containing the strong reflected and refracted multiples associated with hard water-bottom conditions. Here,
14 KB (2,140 words) - 13:08, 26 September 2014
• ...Clayton, R. and Engquist, B., 1980, Absorbing side boundary conditions for wave-equation [[migration]]: Geophysics, 45, 895–904.</ref>.
6 KB (926 words) - 14:26, 23 September 2014
• The seismic waveguide effect of a surface layer is well known. Wave propagation in a surface layer, in particular guided waves, can be describe ...-1.png|thumb|{{figure number|F-1}} (a) A shot gather containing the strong reflected and refracted multiples associated with hard water-bottom conditions. Here,
70 KB (10,953 words) - 15:05, 9 October 2014
• ...ly varying traveltime ''T''(''x, y, z'') ([[Diffraction and ray theory for wave propagation|Section H.2]]) ...f the form defined by equation ({{EquationNote|8-3}}) satisfies the scalar wave equation ({{EquationNote|8-1}}). Substitution of equation ({{EquationNote|8
12 KB (1,916 words) - 08:04, 2 October 2014
• ...ten do not represent the typical refracted arrivals associated with a head wave. Therefore, neither refraction traveltime tomography ([[Topics in moveout a ...face layers, the downgoing incident wave rapidly turns around before being reflected and is recorded by the receiver as the first arrival.
6 KB (801 words) - 17:16, 9 October 2014
• ...Moreover, the offset provides higher chances of converting P waves into S wave. This provides a chance for amplitude variation with offset and anisotropy # Primary P wave
6 KB (900 words) - 15:37, 11 September 2017
• ...c [[migration]] and seismic wavefield modeling algorithms are based on the wave equation. ...sult at depth ''z'' = 0. Both processes use wave equation as the basis for wave extrapolation.
19 KB (2,911 words) - 18:02, 9 October 2014
• Vertical resolution can be calculated from the length of the propagation wave and the layer thickness below 1/4 wavelength for resolving limits of beds. .../4. If the wavelength is larger than λ/4 from the zone where energy was reflected, then the resolution is lower.
6 KB (916 words) - 08:56, 19 March 2018
• ...al layer boundary into its reflected and refracted compressional-and shear-wave components, we want to use the CRP gathers from [[3-D prestack time migrati
4 KB (547 words) - 17:59, 9 October 2014
• ...[[Dictionary:S-wave|shear-wave]] energy are partly [[Dictionary:Reflection|reflected]] from and partly transmitted through each of these layer boundaries. ...change in the ratio of [[Dictionary:P-wave|''P''-wave]] velocity to ''S''-wave velocity, which in turn may imply a change in fluid [[Dictionary:Saturation
4 KB (585 words) - 16:50, 6 October 2014
• ...ement component, ''w'', which is only a function of ''z''. The equation of wave motion ([[Mathematical_foundation_of_elastic_wave_propagation#equation_L-28 ...ed with an isotropic solid. They are directly related to the compressional-wave velocity ''α'' by equation ([[Mathematical_foundation_of_elastic_wave_prop
19 KB (2,801 words) - 16:57, 6 October 2014
• ...at a synclinal interface focuses the energy associated with the reflecting wave, whereas an anticlinal interface defocuses it. ...curvature on angular dependence of reflected wave amplitudes. The incident wave is of compressional type. (a) A synclinal reflector (''x'' < 0), (b) an ant
5 KB (762 words) - 17:00, 6 October 2014
• ...nNote|14}}) can be solved for the reflected and refracted ''P''- and ''S''-wave amplitudes, ''A''<sub>1</sub>, ''B''<sub>1</sub>, ''A''<sub>2</sub>, and '' ...2</sub>)/2, average of the incidence and transmission angles for the ''P''-wave (Figure 11.0-2e).
42 KB (6,342 words) - 11:08, 22 March 2019
• ...variation with offset]], we are then able to make an estimate of the ''S''-wave reflectivity as an AVO attribute (equations {{EquationNote|37}} and {{Equat ...ly indicate that they both are generated by a ''P''-wave source. (An ''S''-wave source would have generated ''SS'' and ''SP'' data.)
12 KB (1,895 words) - 09:44, 7 October 2014
• ...al to the angle of incidence; however, the reflection angle for the ''PS''-wave is smaller than the angle of incidence. As a result, the ''PP'' reflection ...S''-wave. This means that, for an earth model with flat layers, the ''PP''-wave reflection points coincide with the midpoint location (Figure 11.6-31a); wh
10 KB (1,450 words) - 09:57, 7 October 2014
• ...deformation along the propagation path in the subsurface. The equation of wave propagation in elastic solids are derived by using Hooke’s law and Newton ==L.2 Elastic wave equation==
84 KB (13,083 words) - 11:58, 12 September 2020
• ...the intercept section represent the one-dimensional (1-D), primary, ''P''-wave reflectivity series associated with vertical incidence. Care must be given ...]]). Implicit to [[CMP stacking]], we must assume that the reflected ''P''-wave amplitude variation with angle of incidence measured along the normal-moveo
6 KB (779 words) - 18:02, 6 October 2014
• ...nd has furnished case studies to advance the science and practice of shear-wave imaging and interpretation. ...es an alignment between research and the current interests of industry, as reflected by sponsors’ votes. Research results are reported directly to sponsors, e
5 KB (687 words) - 10:43, 28 September 2015
• ...osely spaced interfaces. If the resultant upgoing reflections overlap, the reflected seismic energy will interfere and alter the amplitude response of the true
7 KB (929 words) - 16:38, 16 February 2016
• ...fundamental to reflection seismology. The result (derived below) for the p-wave reflection coefficient (RC) at [[Dictionary:Normal_incidence|normal inciden ...h>\rho_{1}[/itex] and $V_{1}$ are the density and compressional wave velocity of the medium above a reflecting interface.
11 KB (1,531 words) - 19:57, 19 September 2020
• ...they are recorded by a receiver. After calculating the arrival time of the reflected waves and creating a velocity model, size and depth of the underground refl
12 KB (1,835 words) - 17:06, 3 September 2015
• ...n: An antenna emits a short pulse which travels through the subsurface, is reflected at inhomogeneity and travels back to a receiver antenna. Due to because of ...account the frequency dependence of the projections ratio in the Rayleigh wave along with the analysis of its dispersion characteristic. The possibilities
13 KB (2,033 words) - 11:38, 21 September 2015
• ...icated to developing the theory of forward and inverse modeling of seismic wave propagation in heterogeneous and fluid-saturated media. The other aims at u ...l and mathematical sciences), with a theme Kinematic interpretation of the reflected seismic waves (the theory and algorithms)».
10 KB (1,440 words) - 08:22, 14 April 2015
• ...d areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target.RADAR and LiDAR are examples of active * Ultrasound (acoustic) and radar tide gauges measure sea level, tides and wave direction in coastal and offshore tide gauges.
18 KB (2,692 words) - 04:32, 28 April 2017
• ...k and forth over only a small portion of the section so that the resulting wave blends with the primary pulse, changing its waveshape and adding a tail. Se
376 bytes (58 words) - 18:47, 27 April 2017
• Seismic data gives only reflection image of subsurface generated by [[sound wave]]s. Seismic stratigraphy techniques help us for stratigraphic interpretatio ...ect of a wave between the interface of the water and the sea floor, and is reflected in the substructure.
11 KB (1,645 words) - 16:48, 8 December 2018
• ...es the channel. (<b>e</b>) The high-frequency portion of (d), the <b>water wave</b>; its arrival is used in refraction work to determine the range. (From C
1 KB (199 words) - 21:45, 19 June 2017
• {{#category_index:C|channel wave}} ...Special:MyLanguage/Dictionary:Fig_C-2|C-2]]. A channel is also called a <b>wave guide</b> and channel waves are also called <b>guided waves</b> and <b>norm
2 KB (304 words) - 10:32, 11 July 2017
• ...ons. The reflectivity of the earth is approximated by using subsurface and reflected wavefields. <ref>PGS. Reverse Time Migration. Retrieved November 1, 2017, f
6 KB (852 words) - 14:08, 4 January 2018
• ...еанах. Применимы также термины seam wave, guided wave, normal mode propagation ...es the channel. (<b>e</b>) The high-frequency portion of (d), the <b>water wave</b>; its arrival is used in refraction work to determine the range. (From C
2 KB (146 words) - 09:23, 4 October 2017
• ...ating fluids that are halted when encountering the nonporous salt. Seismic wave velocity in the salt is as much as two and one-half times that in the surro ...e dynamite blast was radioed to the recorder and onset time of the seismic wave was measured from timing marks on the recording paper.
4 KB (579 words) - 14:42, 21 February 2019
• ...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 (1,301 words) - 06:09, 22 October 2017
• Using the EWR (Electromagnetic Wave Resistivity) tool, one can measure resistivity of the formation and infiltr ...hole assembly (BHA) is pulled. The CDR tool uses a 2-MHz electromagnetic wave to measure the difference between phase shift and amplitudes measured downh
9 KB (1,376 words) - 14:09, 4 January 2018
• ...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 (1,299 words) - 12:12, 26 October 2017
• {{#category_index:S|standing wave}} ...length intervals. Continuous-wave radio-navigation systems set up standing-wave patterns.
523 bytes (68 words) - 05:30, 1 November 2017
• ...eflector mainly effective in generating a reflection since, for a harmonic wave, the effects of successive zones generally cancel each other. A nomogram fo
1 KB (201 words) - 11:13, 21 November 2017
• ...the first arrival of the downgoing wave is time-coincident with an upgoing wave.&#x2019;&#x2019;
550 bytes (85 words) - 12:16, 7 March 2017
• ...f layers 1, 2, and ''V''<sub>''S''1</sub>, ''V''<sub>''S''2</sub> is the S-wave velocity in layers 1, 2.
524 bytes (80 words) - 13:34, 19 February 2017
• ...here you'll see that we can correct the measured traveltime of a reflected wave ''t'' at a given offset ''x'' to obtain the traveltime at normal incidence
9 KB (1,356 words) - 18:45, 8 May 2017
• ...cuum, 2.997 925&#x00D7;10<sup>8</sup>&#x0020;m/s. <b>3</b>. A seismic wave reflected at the Earth&#x2019;s mantle-core boundary.
261 bytes (42 words) - 14:54, 29 January 2017
• ...2</b>. Seismic wave energy falling on a reflector and thus available to be reflected. It depends on source-receiver configuration and velocity distribution, esp
482 bytes (64 words) - 23:22, 18 January 2017
• ...and block media. He introduced a concept of a tip-wave beam composed from reflected/transmitted waves and associated [[edge waves|edge and tip waves]]. In the ...to enhance the resolution of details in the underground. The edge and tip wave theory of diffractions provides a physically sound and mathematical consist
2 KB (327 words) - 15:37, 14 February 2017
• ...es (radar), usually in the 10 to 1000 MHz band. The two-way traveltimes of reflected radar waves give the depths where changes in electrical properties occur. A ...e or propagate as a radio wave. Responses to the EM field that propagate a wave are measured as signal by the receiving antenna.
14 KB (2,083 words) - 09:49, 21 September 2017
• ...from [[Dictionary:reflection|reflected]] [[Dictionary:seismic wave|seismic wave]]s. The method requires a controlled [[Dictionary:source|seismic source]] o
528 bytes (70 words) - 17:42, 28 September 2016
• ...attached to the sides with a coil of wire suspended inside the magnet. As reflected waves return, the body of the geophone vibrates with the ground caused by t ...ifference travels through the water column and into the subsurface, and is reflected back up to the surface. Below are a few examples of sources used in marine
19 KB (2,977 words) - 17:21, 21 April 2020
• ...s trailed behind the ship. Sharp pulses are detections that the pulses of reflected sound arrived. The sound intensity is a function of time. The air gun is sh
9 KB (1,350 words) - 15:41, 11 October 2018
• Since each seismic wave fronts has different arrival times at each station and those times are conditional to slowness and wave front sensor location, the next time
12 KB (1,892 words) - 14:37, 28 October 2020
• ...into the ground, and measurements of the amplitude and travel time of the reflected waves are recorded. The contrasts of the electrical properties of the groun ...lous can be identified by deviations from the general pattern that seismic wave velocities normally increase with depth (mainly due to the pressure increas
11 KB (1,690 words) - 22:32, 17 April 2018
• Vertical resolution can be calculated from the length of the propagation wave and the layer thickness below 1/4 wavelength for resolving limits of beds. ...λ/4. If the wavelength is larger than λ/4 from the zone where energy was reflected, then the resolution is lower.<ref name=":1" />
8 KB (1,144 words) - 22:45, 19 April 2018
• {{#category_index:T|turning wave}} ...ath (for example, by an overhanging salt flank), it is called a <b>turning-wave reflection</b> (see Figure [[Special:MyLanguage/Dictionary:Fig_D-19|D-19]])
597 bytes (94 words) - 15:26, 9 April 2019
• ...es the channel. (<b>e</b>) The high-frequency portion of (d), the <b>water wave</b>; its arrival is used in refraction work to determine the range. (From C
802 bytes (130 words) - 09:25, 28 March 2018
• ...e picked with reasonable certainty. Depends on the energy of the reflected wave, the presence of noise, and the processing to which the data are subjected
491 bytes (71 words) - 09:56, 28 March 2018
• This model is a consequence of the concept that each reflected wave causes its own effect at each geophone (or hydrophone) independent of what
782 bytes (124 words) - 10:19, 28 March 2018
• The energy or wave from a seismic source that has been reflected (returned) from an acoustic-impedance contrast (<b>reflector</b>) or series
620 bytes (85 words) - 10:20, 28 March 2018
• {{#category_index:R|reflected refraction}} ...ys coplanar. <br>(<b>d</b>) Multiply reflected refractions. <br>(<b>e</b>) Reflected refractions do not always involve head waves.]]
1 KB (177 words) - 10:21, 28 March 2018
• ...l&#x2202; nat&#x2019; ik) The locus for a given traveltime of wave energy reflected or refracted at a surface. Wavefronts are aplanatic surfaces for reflection
849 bytes (120 words) - 10:21, 28 March 2018

View (previous 100 | next 100) (20 | 50 | 100 | 250 | 500)