Search results

Jump to: navigation, search
Results 1 – 50 of 234
Advanced search

Search in namespaces:

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  • ...l∂ nat’ 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
  • ...aves illustrating wave nomenclature. See also ''[[Dictionary:wave_notation|wave notation]]''.
    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

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