Results 161 to 170 of about 10,893 (215)
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Geophysics, 1989
Abstract Many tomographic interpretations of crosshole seismic traveltimes have approximated the raypaths with straight lines connecting the source and receiver. This approximation is valid where the velocity does not vary greatly, but in many regions of interest velocity variations of 10-20 percent or more are observed, causing ...
N. D. Bregman +2 more
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Abstract Many tomographic interpretations of crosshole seismic traveltimes have approximated the raypaths with straight lines connecting the source and receiver. This approximation is valid where the velocity does not vary greatly, but in many regions of interest velocity variations of 10-20 percent or more are observed, causing ...
N. D. Bregman +2 more
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Seismic Tomography of Macedonia
2020<p>A novel geotomography technique has been applied in and around Macedonia using selected earthquakes that occurred over a period of 40 years and were recorded on 47 seismograph stations. The aim was to test this new tomography method for the first time in investigation of the crustal shape and structures in that specific ...
Cvetan Sinadinovski +3 more
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Seismic tomography of the Moon
Science Bulletin, 2008We attempted to determine the first three-dimensional P and S wave velocity and Poisson’s ratio structures of the lunar crust and mantle down to 1000 km depth under the near-side of the Moon by applying seismic tomography to the moonquake arrival-time data recorded by the Apollo seismic network operated during 1969 to 1977.
DaPeng Zhao, JianShe Lei, Lucy Liu
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Seismic Tomography Of The Earth'S Mantle
Annual Review of Earth and Planetary Sciences, 1991The analysis of information contained in seismograms is the most promis ing tool for retrieving the three-dimensional structure of the Earth's mantle and thereby improving our understanding of its dynamics. The procedure through which three-dimensional images of different parts of the Earth's interior arc obtained by inversion of a set of observables ...
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Global seismic tomography: the inverse problem and beyond
Inverse Problems, 1998Global seismic tomography has produced a great amount of robust information concerning the three-dimensional extent of the Earth's internal structure. This has stimulated a multidisciplinary discussion aimed at understanding the mechanisms which govern the internal evolution of our planet.
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Fundamentals of Seismic Tomography
1994We define tomography as an imaging technique which generates a cross-sectional picture (a tomogram) of an object by utilizing the object's response to the nondestructive, probing energy of an external source. Seismic tomography makes use of sources that generate seismic waves which probe a geological target of interest.
Tien-when Lo, Philip L. Inderwiesen
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A Breviary of Seismic Tomography
2008This is the first textbook to cover the essential aspects of the topic at a level accessible to students. While focusing on applications in solid earth geophysics, the book also includes excursions into helioseismology, thereby highlighting the strong affinity between the two fields. The book provides a comprehensive introduction to seismic tomography,
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The Leading Edge, 2005
One of the main challenges in seismic imaging is the estimation of sufficiently accurate background velocity models in the presence of complex geology. In this paper we show the use of a differential semblance in angle or DSA (Symes and Carazzone, 1991; Brandsberg-Dahl et al., 2003) misfit function to perform ray-based angle tomography on PP and its ...
Bjørn Ursin +3 more
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One of the main challenges in seismic imaging is the estimation of sufficiently accurate background velocity models in the presence of complex geology. In this paper we show the use of a differential semblance in angle or DSA (Symes and Carazzone, 1991; Brandsberg-Dahl et al., 2003) misfit function to perform ray-based angle tomography on PP and its ...
Bjørn Ursin +3 more
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Seismic wave propagation and seismic tomography
1987This chapter develops the basic principles of seismic tomography and serves as a general introduction to this book.
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2007
The main breakthrough in seismology during the last ten years is related to the emergence and development of more and more sophisticated 3-dimensional imaging techniques, usually named seismic tomography, from the local scale up to global scale of the Earth.
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The main breakthrough in seismology during the last ten years is related to the emergence and development of more and more sophisticated 3-dimensional imaging techniques, usually named seismic tomography, from the local scale up to global scale of the Earth.
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