Results 51 to 60 of about 856 (202)
Mechanism of Anelasticity [PDF]
Geophysical Journal International, 1988 SUMMARY to modem vector processors-‘supercomputers’-now makes possible extremely large-scale seismological computations, in which the anelasticity of the earth can be treated in an exact manner. For this exact formalism to be physically meaningful, it must be shown to be consistent with a convincing physical model of anelasticity.
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Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract The physical conditions governing earthquake initiation are largely unknown, particularly in the minutes to seconds preceding rupture. While there is geodetic and seismic evidence of precursory activity in the hours to weeks prior to large earthquakes, the observational evidence immediately preceding the earthquake rupture is limited and ...
A. M. McPherson, C. Tape, Y. Kaneko
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Rejuvenated Amorphous Alloys: Processing Methods, Microstructures and Mechanical Properties
Advanced Science, Volume 13, Issue 33, 15 June 2026.Three rejuvenation methods – mechanical and thermal rejuvenation, and other rejuvenation routes such as ultrasonic processing – can be used to modify structures of glassy alloys, especially atomic clusters, and therefore enhances plasticity and activates work‐hardening behaviors.
Can Yang +10 more
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Gravity Wave Activity in the Stratosphere and Mesosphere During Hurricane Sam
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Multi‐instrument observations of gravity wave (GW) activity during Hurricane Sam (2021) were made using AIRS (Atmospheric Infrared Sounder) satellite data, ERA5 reanalysis, and TIMED/SABER temperature profiles. Two GW extraction methods, vertical high‐pass filtering and empirical mode decomposition, were applied to quantify wave‐induced ...
Ayden L. S. Gann, Erdal Yiğit
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Poromechanical and Crack Evolution of Olivine‐Rich Rock During Serpentinization
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract Serpentinization alters the strength, fracture behavior, and rheology of ultramafic rocks, yet the coupled evolution of mineral reactions, cracking, and mechanical softening remains poorly constrained. We experimentally simulated serpentinization in dunite at 220°C and 15 MPa for 14 and 30 days and compared the reacted specimens with dry heat ...
Ummu‐kulthum Lawal, Kiseok Kim
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, 2021 This paper reconstructs the anelastic approximation in such a manner that it can be applied to any kind of fluid. As a result, it turns out that the work done by the buoyancy force in the approximation corresponds to the conversion between kinetic and internal energy. Also, the conditions for the applicability of the approximation are clarified.
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The Anelasticity of the Mantle* [PDF]
Geophysical Journal of the Royal Astronomical Society, 2010 The attenuation of seismic waves provides the most direct data regarding the non-elastic properties of the Earth. Recent experimental results from body waves, surface waves and free oscillations provide estimates of the anelasticity in various regions of the Earth.
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Spin Transition of Fe3+ in δ‐(Al,Fe)OOH and Implication for Mid‐Lower Mantle Seismic Heterogeneities
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract δ‐(Al,Fe)OOH is an important water carrier and plays a critical role on Earth's deep water cycle. Lattice parameters of δ‐(Al0.89Fe0.11)OOH were measured by synchrotron single‐crystal X‐ray diffraction at simultaneously high temperature and pressure up to 65 GPa and 800 K in diamond anvil cells.
Chaoshuai Zhao +7 more
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Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract The CAS phase (CaAl4Si2O11) is a key phase formed in subducted silica‐alumina rich crustal and sedimentary materials under the mantle transition zone conditions. In this study, its elastic properties were investigated using first‐principles calculations up to 30 GPa.
Baoyun Wang, Meisu Xiang
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Seismic pulse propagation with constant Q and stable probability distributions
Annals of Geophysics, 1997 The one-dimensional propagation of seismic waves with constant Q is shown to be governed by an evolution equation of fractional order in time, which interpolates the heat equation and the wave equation.
M. Tomirotti, F. Mainardi
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