Results 211 to 220 of about 22,070 (265)
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On the ionospheric effects of asthenospheric earthquakes
Physics of the Earth and Planetary Interiors, 1989Abstract Characteristic foF2 variations during preparation of the asthenospheric Hindukush earthquake of 12 September 1983 are investigated. Stable effects in F2 layer critical frequency variations are revealed which can be considered as earthquake precursors.
M.N. Fatkullin +2 more
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Lithosphere–asthenosphere P-wave reflectivity across Australia
Earth and Planetary Science Letters, 2015Brian L N Kennett
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A plume origin for hydrous melt at the lithosphere–asthenosphere boundary
Nature, 2022D. Blatter, S. Naif, K. Key, A. Ray
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Stress and viscosity in the asthenosphere
Tectonophysics, 1979Abstract Stresses and effective viscosities in the asthenosphere to a depth of 400 km are calculated on the basis of Weertmans “temperature method” i.e., on relating viscosity to the ratio of the temperature to the melting point (=homologous temperature).
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Enriched Asthenosphere and Depleted Plumes
International Geology Review, 1996“Lithosphere” and “asthenosphere” are mechanical concepts; “depleted mantle” (DM), “enriched mantle” (EM), and “primitive mantle” (PM) are chemical concepts. Upper mantle, lower mantle, and D″ are seismological subdivisions. Geochemistry provides few constraints on the locations of mantle reservoirs, but it is generally assumed that the MORB reservoir (
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Electrical conductivity of the lithosphere-asthenosphere system
, 2021S. Naif +4 more
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Lithospheric Deformation and Asthenospheric Pressure
1990We present here a model of lithospheric deformation caused by a radial pressure acting at the base of the lithosphere. Such a pressure may arise, for instance, as a result of convective motions occurring in the Earth’s mande. As a first approximation, we consider a rather simple Earth model consisting of a fluid interior, the mantle or asthenosphere ...
Martine Amalvict, Hilaire Legros
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Electromagnetic Studies Of The Lithosphere And Asthenosphere
Surveys in Geophysics, 1999In geodynamic models of the Earth's interior, the lithosphere and asthenosphere are defined in terms of their rheology. Lithosphere has high viscosity, and can be divided into an elastic region at temperatures below 350 °C and an anelastic region above 650 °C.
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Geodynamics of melting in the Asthenosphere
2016At geological time-scales, the mantle behaves as a high Rayleigh number fluid, i.e., thermal convection takes place and produces cells circulating at variable sizes and speeds. A lot of effort has been made to understand the upwelling part of these cells occurring underneath ridges and hotspots where they give birth to volcanoes.
Gaillard, Fabrice +5 more
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Seismic studies of the lithosphere and asthenosphere
Reviews of Geophysics, 1995Seismic studies of the lithosphere and asthenosphere over the last quadrennium have taken full advantage of recent advances in sensor and computer technology with concomitant increase in data volume, dynamic range, and resolution. The IRIS (Incorporated Research Institutions for Seismology) consortium has implemented first order improvements in ...
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