Results 61 to 70 of about 1,046 (190)

Antarctic Geothermal Heat Flow, Crustal Conductivity and Heat Production Inferred From Seismological Data

Geophysical Research Letters
Geothermal heat flow is a key parameter in governing ice dynamics, via its influence on basal melt and sliding, englacial rheology, and erosion. It is expected to exhibit significant lateral variability across Antarctica.
James A. N. Hazzard, Fred D. Richards
doaj   +1 more source

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
doaj   +1 more source

Tracking Deep Mantle Melting on Mars Using Phobos Tides

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract We study the deep internal structure and rheological state of Mars by analyzing its response to tidal forces exerted by Phobos and by introducing a melt fraction in the mantle layers. Motivated by recent seismic evidence for a basal molten layer near the base of the Martian mantle, we explore the distribution of melt within the mantle and its ...
A. Guinard, A. Fienga, A. Mémin, D. Antonangeli   +3 more
wiley   +1 more source

Inferring Io's Internal Properties by Combining Gravity Measurements and Volcanic Activity

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract With its extreme geological activity, Io represents an archetype for tidally heated exoplanets/moons and provides insight into early stages of terrestrial planet evolution. Decades of ground‐based observations and multiple space missions have refined our understanding of Io, yet it remains debated where inside Io the tidal heating takes place.
A. Veenstra, M. Rovira‐Navarro, W. van der Wal   +2 more
wiley   +1 more source

Activation Energy Measurement of Oxygen Ordering in a Nb-Ti Alloy by Anelastic Relaxation

Materials Research, 2002
Metals with bcc structure are able to dissolve large amounts of interstitial element atoms in the form of oxygen. These atoms diffuse through the lattice by jumping into octahedral sites with equivalent symmetry, causing strong alterations in the ...
Niemeyer T.C., Gimenez J.M.A., Almeida L.H., Grandini C.R., Florêncio O.   +4 more
doaj  

Chemical, structural, microstructural, mechanical, and biological characterization of Ti–25Ta-xNb system alloys for biomedical applications

Journal of Materials Research and Technology
This study delves into the comprehensive characterization of the Ti–25Ta-xNb alloy system, whith a focus on its potential biomedical applications. Int intriguing insights into these alloys properties were unveiled through a systematic investigation ...
Fernanda de Freitas Quadros, Pedro Akira Bazaglia Kuroda, Willian Fernando Zambuzzi, Celio Junior da Costa Fernandes, Fenelon Martinho Lima Pontes, Carlos Roberto Grandini   +5 more
doaj   +1 more source

Comparison of Seismic Performance Assessment Using Observed or Simulated Ground Motions in Seismic Hazard Analysis and Ground Motion Selection

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 10, Page 2449-2465, August 2026.
ABSTRACT This paper illustrates opportunities for the use of simulated ground motions in seismic performance assessment – from seismic hazard, ground‐motion selection, response history analysis, and seismic demand hazard calculation. The illustration is through a comparative analysis with the conventional alternative of observed ground motions.
Vahid Loghman, Brendon A. Bradley, Claudio Schill   +2 more
wiley   +1 more source

L'atténuation intrinsèque des ondes sismiques. Première partie : Définitions et mesures Intrinsic Attenuation of Seismic Waves. Part 1: Definitions and Measurements

Oil & Gas Science and Technology, 2006
La notion d'atténuation acoustique est séparée en deux types, à savoir l'atténuation intrinsèque, liée au milieu poreux et à ses fluides saturants et l'atténuation extrinsèque liée à la géométrie du milieu poreux.
Bourbié T.
doaj   +1 more source

Partitioning Site Amplification and κ0 in Earthquake Recordings

Earthquake Spectra, Volume 42, Issue 3, August 2026.
This study explores site amplification and spectral decay (κ0) estimates, focusing on the challenge of separating the two in observed Fourier amplitude spectra (FAS). We apply two general approaches: a Bayesian broadband inversion for simultaneous estimation of site amplification and κ0, and slope‐based methods for direct κ0 estimation from the ...
Bartik Pandel, Ellen M. Rathje, Alexandros Savvaidis, Albert R. Kottke   +3 more
wiley   +1 more source

Linear Toroidal‐Inertial Waves on A Differentially Rotating Sphere with Application to Helioseismology: Modeling, Forward and Inverse Problems

Mathematical Methods in the Applied Sciences, Volume 49, Issue 12, Page 14122-14148, August 2026.
ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon, Thorsten Hohage   +3 more
wiley   +1 more source