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Browsing ELibrary by Title
Now showing items 13480-13499 of 26297
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(2002)Seismic anisotropy provides evidence for the physical state and tectonic evolution of the lithosphere. We discuss the origin of anisotropy at various depths, and relate it to tectonic stress, geotherms and theology. The ...
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(1996)Seismic anisotropy beneath continents is analyzed from shear-wave splitting recorded at more than 300 continental seismic stations. Anisotropy is found to be a ubiquitous property that is due to mantle deformation from ...
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(2006)Shear-wave splitting estimates from recordings of 10 portable seismographic stations during the first year of the RETREAT seismic deployment, in combination with broadband data from the Italian national seismic network, ...
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(2006)Knowledge about seismic anisotropy can provide important insight into the deformation of the crust and upper mantle beneath tectonically active regions. Here we focus on the southeastern part of the Tibetan plateau, in ...
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(2006)In the south-eastern corner of the Tyrrhenian basin, in the central Mediterranean Sea, a tight alignment of earthquakes along a well-defined Benioff zone marks one of the narrowest active trenches worldwide, where one of ...
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(2004)Analytical expressions for three P-wave attenuation mechanisms in sedimentary rocks are given a unified theoretical framework. Two of the models concern wave-induced flow due to heterogeneity in the elastic moduli at ...
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SEISMIC ATTENUATION DUE TO WAVE-INDUCED FLUID FLOW IN A POROUS ROCK WITH SPHERICAL HETEROGENEITIES (2006)Most natural porous rocks have heterogeneities at nearly all scales. Heterogeneities of mesoscopic scale - That is, much larger than the pore size but much smaller than wavelength - Can cause significant attenuation and ...
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(2006)In a comparative study of two long-term deployments we characterize the seismic noise on the seafloor in the North Atlantic south of Iceland and in the Tyrrhenian Sea north of Sicily. We estimate the teleseismic body-wave ...
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(2006)The active summit lava lake of Erta 'Ale volcano, Ethiopia, offers a unique opportunity to study magma convection. In February 2002, we collected a multiparametric set of seismic, thermal and video data. These data indicate ...
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(2006)This study provides new constraints on the resolvability of mantle flow in subduction zone settings as inferred by observations of seismic anisotropy. We are motivated by the broad range of shear wave splitting observations ...
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(2006)As geophysicists rely increasingly on effective media theories to characterize naturally fractured reservoirs, they become more and more interested in evaluating the accuracy of different theories, estimating their limits ...
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(2001)The coherent-state transform (CST) is essentially a Gaussian-windowed Fourier transform and it yields a combined slowness-position (p, x) domain representation of seismic wavefields. Several forms of the inverse CST exist ...
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(1989)Traditional instrumental seismologic observations provide information on the accelerations, velocities and displacements of the ground at various distances from the centers of earthquakes and explosions. Seismic instruments ...
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(1989)The southern, deep-water part of the Aegean Sea includes the Cretan Trough, which is bounded in the north by the South Aegean volcanic belt (with the well known Santorin volcano) and in the south by the Hellenic Island Arc ...
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(1988)Seismic energy release during the precursory, eruptive and declining stages of volcanic activities provides various information about the mechanisms of volcanic eruptions and the temporary developments of their activities. ...
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(1998)A study of the seismicity that preceded and accompanied eruptions in the Karymsky volcanic center revealed a relationship between the seismic processes caused by local tectonic movements and volcanic eruptions at Karymsky ...
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(2001)A non-linear iterative P-wave traveltime tomography has revealed a mantle plume originating at a depth of nearly 1000km, rising across the 600 km discontinuity, and deflecting subhorizontally in the uppermost mantle ...
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(2003)The behaviour of seismic shear waves shows that fluid-rock interactions control both low-level deformation of the intact rock mass before fracturing takes place, and the fracturing or faulting process itself in deep in ...
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(1996)A major problem in geodynamics with seismic data is discussed: How deeply do the continents penetrate into the mantle? Differential travel times of underside reflections from mantle discontinuities that appear as precursors ...
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(2006)Neogene rift system configuration for the back-arc of southwest Japan, southern rim of the Japan Sea, is argued on the basis of reflection seismic interpretation. Divergent rifting and subsequent contraction provoked by ...
Now showing items 13480-13499 of 26297