2-D and 3-D velocity patterns in southeastern Europe, Asia Minor and the eastern Mediterranean from seismological data
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In this article, the authors used the Backus-Gilbert formalism for linear inversion of travel-time data extended to 2-D and 3-D inhomogeneous media.Abstract:
Summary
2-D group velocity and 3-D P-wave velocity patterns have been obtained from analyses of the group velocity dispersion of Rayleigh waves in south-eastern Europe and Asia Minor and of the P-wave travel-time residuals along ray-paths with a penetration depth of 100–300 km in southeastern Europe, Asia Minor and the eastern Mediterranean. The inversion procedure used is based on Backus–Gilbert formalism for linear inversion of travel-time data extended to 2-D and 3-D inhomogeneous media. Group velocity distributions have been obtained for periods T= 10, 20, 30 s and are in a very good agreement with the well-known characteristics of the crust and upper mantle structure. They can be used for the construction of models of the crust in south-eastern Europe and Asia Minor. The P-wave velocity patterns obtained for the depth interval 50–300 km are discussed in terms of geophysical (regional isostatic anomaly, heat flow) data for the region. It is proposed that the correlation found to exist between the different mapped geophysical parameters can be explained by compositional changes in the low-velocity layer (the increase of the iron content in minerals).read more
Citations
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References
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Journal ArticleDOI
Travel times and station corrections for P waves at teleseismic distances
TL;DR: In this paper, the authors used approximately 3,00 shallow focus earthquakes and 1000 seismic stations to study P wave travel times and station residuals, including azimuthal effects.
Book
Terrestrial Heat Flow in Europe
Vladimír Čermák,Ladislaus Rybach +1 more
TL;DR: In this paper, a critical review of heat flow measurements in Sea and Lake Bottom Sediments is presented, with special reference to the Region of Europe (With 6 Figures), and the correction of subsurface temperature measurements for the effects of topographic relief in terrains with high relief.
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The lithosphere in the central-eastern Mediterranean area
TL;DR: In this article, the inversion of the regional dispersion relations derived from analysis of surface waves was investigated for the central-eastern Mediterranean area, and large lateral variations have been detected in the lithosphere thickness, which varies from a minimum of about 30 km corresponding to the Tyrrhenian Sea and south of Crete to a maximum of about 130 km, while the subMoho S-wave velocity varies in the range 4.2-4.8 km/sec.
Journal ArticleDOI
Solution of the inverse problem of seismology for laterally inhomogeneous media
TL;DR: In this paper, the Backus-Gilbert method has been extended to the estimation of the seismic wave velocity distribution in 2D or 3D inhomogeneous media from a finite set of travel-time data.