Results 21 to 30 of about 141 (133)

Viscoacoustic Full Wavefield Migration With Tomographic Q Estimation

Geophysical Prospecting, Volume 74, Issue 4, May 2026.
ABSTRACT Seismic wave propagation in the Earth's subsurface is influenced by anelastic attenuation, which causes energy loss and waveform distortion, degrading image resolution. This effect, quantified by the quality factor (Qf${{\textit {Q}}_f}$), is particularly pronounced in settings such as carbon capture and storage and near‐surface studies, where
Mohammad Safari, Dirk Jacob Verschuur
wiley   +1 more source

Earth's Lower Mantle Predominated by Ferric Iron‐Rich Bridgmanite Inferred From High Pressure Elasticity Measurements

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The absence of sound‐velocity data spanning the entire lower mantle pressures for (Fe, Al)‐bearing bridgmanite impedes direct comparisons with seismic wave observations, leaving the chemistry of the lower mantle unresolved. The present ultra‐high pressure sound‐velocity measurements of in situ synthesized (Fe, Al)‐bearing bridgmanite up to 130 
P. Saha, M. Murakami, N. Miyajima
wiley   +1 more source

Al2O3 in Anorthositic Slabs: A New Perspective on LLSVPs and Seismic Velocity Variations

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Aluminum is a key component of crustal and mantle minerals, influencing melting and geochemical evolution within the Earth. Al2O3 exists as corundum at the surface and in upper mantle conditions, but transforms into high‐pressure phases like Rh2O3(II) at lower mantle depths, enabling stability over a wide pressure range.
Ishita Das, Vincent Adongo, Gaurav Shukla   +2 more
wiley   +1 more source

Adsorption Preceding Wetting Front Controls Seismic Velocity

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Rock elasticity varies with both humidity and water saturation, yet their combined effects remain poorly understood, although in nature vapor adsorption and liquid infiltration occur simultaneously. Here, we present experimental data of P‐wave velocity and volume expansion in a free‐standing sandstone subject to progressive wetting.
Rui Wu, Hongpu Kang, Fuqiang Gao, Xiangyuan Peng, Shuangyong Dong, Chenxi Zhao, Bing Qiuyi Li, Kerry Leith, Qinghua Lei, Gennady Y. Gor, Paul A. Selvadurai, Xiaoping Jia   +11 more
wiley   +1 more source

Seismic Attenuation Reveals Fault and Forearc Structure Across the Subduction‐Collision Transition in Southern Taiwan

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The Southern Array for the Lithosphere and Uplift of Taiwan Experiment (SALUTE) provides a new window into the subduction‐collision transition zone in southern Taiwan, where the Eurasian Plate‐Luzon Arc convergence drives intense orogeny and crustal deformation. Using dense P‐ and S‐wave spectral amplitude data recorded by SALUTE and a quality
Yu‐Pin Lin, Shu‐Huei Hung, Tai‐Lin Tseng, Pei‐Ying Patty Lin, Eh Tan, Ying‐Nien Chen   +5 more
wiley   +1 more source

Thermally Induced Creep and Viscoelastic Behavior of Copper Micropillar Arrays

Advanced Science, Volume 13, Issue 22, 17 April 2026.
Copper micropillar arrays are fabricated by electrodeposition within through‐glass‐via, and their thermally induced time‐dependent deformation is quantified. Nanoindentation creep, EBSD, and TEM reveal a heat‐treatment‐driven transition between grain‐boundary‐mediated deformation and dislocation‐dominated creep, while Kelvin modeling captures ...
Miao Wang, Jihua Zhang, Libin Gao, Hongwei Chen, Wenbo Luo, Wenlei Li, Mingcheng Chen, Mengru Li, Dongbin Wang, Shuang Li, Ting Liu, Xingzhou Cai, Yong Li, Bin Peng, Wanli Zhang   +14 more
wiley   +1 more source

3D P‐Wave Attenuation Tomography of the Tonga‐Lau Subduction System With Improved Earthquake Source Parameters and a Transdimensional Bayesian Markov Chain Monte Carlo Approach

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Seismic attenuation, resulting from anelasticity of Earth's materials, provides critical information on the thermal and compositional characteristics of Earth's interior. Accurately measuring the seismic wave energy loss during propagation and conducting seismic attenuation is challenging, as conventional methods for measuring attenuation ...
Yurong Riley Zhang, S. Shawn Wei, Joseph S. Byrnes, Dongdong Tian, Fan Wang, Maximiliano Bezada   +5 more
wiley   +1 more source

A Hybrid Probabilistic Framework for Mixed Discrete–Continuous Subsurface Parameter Estimation From Multi‐Physics Geophysical Data: A Case Study for Quantifying the Geofluid Mapping in the Crust and Upper Mantle

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Joint estimation of discrete (e.g., lithology or geofluid type) and continuous (e.g., porosity, pore geometry, related connectivity) subsurface parameters represents a challenging inverse problem due to strong parameter trade‐offs, effective non‐uniqueness, and multi‐modal posterior structures.
Chunjie Zhang, Hikaru Iwamori
wiley   +1 more source

Investigating the Detectability of Body Wave Phases From Tidal Ice Cracking Events on Titan With the Dragonfly Short‐Period Seismometer

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Detecting seismic activity on Saturn's icy moon Titan during the Dragonfly mission could provide crucial information on its internal structure. The geological complexity of the moon's surface suggests significant cyclic tidal deformation, likely leading to the fracturing of the ice shell.
L. Delaroque, T. Kawamura, A. Lucas, S. Rodriguez, K. Onodera, H. Shiraishi, R. Yamada, S. Tanaka, M. P. Panning, R. D. Lorenz   +9 more
wiley   +1 more source

Anelastic Effects in Fe-Ga and Fe-Ga-Based Alloys: A Review. [PDF]

Materials (Basel), 2023
Golovin IS.
europepmc   +1 more source