Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Ilkka Noponen"'
Autor:
Ilkka Noponen
Publikováno v:
GEOPHYSICS. 60:1930-1932
When checkshot surveys are done in deviated wells, two source‐receiver geometries are used. In one, the wave source is moved on the earth’s surface in unison with the horizontal movement of the receiver in the well so that the raypath from the so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0a49b0a715b0f2ebf55ffe4f78a6cd1
https://doi.org/10.1190/1.1443924
https://doi.org/10.1190/1.1443924
Publikováno v:
SEG Technical Program Expanded Abstracts 1997.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b19101ed3fedb696e0bc4cc60b534866
https://doi.org/10.1190/1.1885669
https://doi.org/10.1190/1.1885669
Autor:
Ilkka Noponen, John H. Anderson
Publikováno v:
Proceedings.
3-D prestack depth migration requires an accurate 3-D velocity model. Fortunately, the migration results themselves can be inspected and used to improve the initial velocity model. The data can then be remigrated. In this paper we describe the applic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18e7c5a200601e68c5dd73d9f660ed2c
https://doi.org/10.3997/2214-4609.201409254
https://doi.org/10.3997/2214-4609.201409254
Publikováno v:
Geoexploration. 17:1-9
The paper discusses the possibilities for observing reflections from discontinuities within crystalline rocks, at depths of interest for drilling and mine-working. It is concluded that the impedance contrasts of most mafic rocks and high-density ores
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69417b20883d7cdea5d64aeab040ca31
https://doi.org/10.1016/0016-7142(79)90002-4
https://doi.org/10.1016/0016-7142(79)90002-4
Autor:
Pekka Heikkinen, Ilkka Noponen
Publikováno v:
Physics of the Earth and Planetary Interiors. 14:71-76
Velocities of upper-mantle P waves (Pn) generated by large shallow earthquakes in the Japan area have been studied by the time-term method in three areas of the Japanese islands. Data reported from routinely recording seismic stations, grouped to act
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::773ac264081236642f3fd91cdfdec72b
https://doi.org/10.1016/0031-9201(77)90046-2
https://doi.org/10.1016/0031-9201(77)90046-2
Autor:
Joe Keeney, Ilkka Noponen
Publikováno v:
GEOPHYSICS. 51:20-33
By limiting data input to the forward‐inverse tau‐p transform pair, velocity filtering which varies with time and offset can be achieved. The limiting procedure, called hyperbolic velocity filtering, suppresses coherent noise while retaining refl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec0e6bcb29fd1f24be70a7e47e53d046
https://doi.org/10.1190/1.1442035
https://doi.org/10.1190/1.1442035
Autor:
Ilkka Noponen
Publikováno v:
Geologiska Föreningen i Stockholm Förhandlingar. 99:32-36
Studies of the mean travel-time residual of seismic P-waves propagated from distant sources to stations in Fennoscandia indicate that the mean station residual increases from the centre of the Baltic Shield towards the Atlantic coast. This is interpr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cabe55af50f28fc4c3c1fb7df231a259
https://doi.org/10.1080/11035897709454983
https://doi.org/10.1080/11035897709454983
Autor:
Ilkka Noponen
Publikováno v:
Journal of Physics of the Earth. 16:79-85
Multicomponent recordings of P-wave groups from 4 underwater explosions in the Baltic Shield are processed to study the possibility of utilizing the particle motion in the interpretation of records from near events. Several of the phases predicted by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89ef1d5d6464c0a560e2ea2a35570719
https://doi.org/10.4294/jpe1952.16.79
https://doi.org/10.4294/jpe1952.16.79
Autor:
Ilkka Noponen
Publikováno v:
SEG Technical Program Expanded Abstracts 1987.
The appearance of virtual reflectors is caused by the vertical recording line of a VSP which produces a vertical axis of symmetry. The reflected wave is seen as emanating from an image source below the reflector. There are, however, infinitely many i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afcd58c52e034943b76607d3dc3e75eb
https://doi.org/10.1190/1.1891962
https://doi.org/10.1190/1.1891962
Autor:
Ilkka Noponen
Publikováno v:
SEG Technical Program Expanded Abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fad373a5cc295b90ac0e1a5fee335388
https://doi.org/10.1190/1.1892695
https://doi.org/10.1190/1.1892695