Results 71 to 80 of about 10,989 (307)

Seismic reflection imaging of deep crustal structures via reverse time migration using offshore wide-angle seismic data on the eastern margin of the Sea of Japan

Earth, Planets and Space, 2022
We applied reverse time migration (RTM) to offshore wide-angle seismic data acquired with airgun shots and sparsely deployed ocean bottom seismographs (OBSs) for reflection imaging of the Moho discontinuity in the eastern margin of the Sea of Japan ...
Kazuya Shiraishi, Tetsuo No, Gou Fujie
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Resolving Continental Magma Reservoirs With 3D Surface Wave Tomography

Geochemistry, Geophysics, Geosystems, 2022
Surface wave tomography is widely used to improve our understanding of continental magma reservoirs that may be capable of fueling explosive volcanic eruptions.
Ross Maguire, Brandon Schmandt, Min Chen, Chengxin Jiang, Jiaqi Li, Justin Wilgus   +5 more
doaj   +1 more source

3D velocity-depth model building using surface seismic and well data [PDF]

, 1998
The objective of this work was to develop techniques that could be used to rapidly build a three-dimensional velocity-depth model of the subsurface, using the widest possible variety of data available from conventional seismic processing and allowing for
Sexton, Paul
core  

Breaking Adria: adjoint tomography of a disappearing continental microplate

, 2022
The Adria plate plays a peculiar role in the geodynamics of the Central Mediterranean. It is the foreland of non-coeval mountain ranges and its margins are consumed in the process by subduction systems under the Alps to the north, the Apennines to the
Ciaccio, Maria Grazia, Di Stefano, Raffaele, Magnoni, Federica, Casarotti, Emanuele, Stallone, Angela   +4 more
core  

Robust constraints on average radial lower mantle anisotropy and consequences for composition and texture [PDF]

, 2015
Seismic anisotropy has been observed in the upper mantle (
de Wit, R. W L, Seismology, Trampert, J., NWO-TOP grant: Probabilistic tomography: from seismic waveforms to thermo-chemical models using neural networks   +3 more
core   +1 more source

Investigation on the failure evolution characteristics of surrounding rock in deep cross‐fault roadway: Based on physical model test and numerical simulation

Deep Underground Science and Engineering, EarlyView.
This study reveals the failure evolution characteristics of deep cross‐fault roadway surrounding rock under excavation support and periodic weighting. Periodic weighting readily induces fault activation, with the spatial distribution of failed rock masses being controlled by the fault strike and dip.
Tiezhu Li, Suping Peng, Jing Zheng, Zhanhua Yang, Qijun Tian   +4 more
wiley   +1 more source

LitMod2D_2.0: An Improved Integrated Geophysical‐Petrological Modeling Tool for the Physical Interpretation of Upper Mantle Anomalies

Geochemistry, Geophysics, Geosystems, 2020
LitMod2D integrates geophysical and petrological data sets to produce the thermal, density, and seismic velocity structure of the lithosphere and upper mantle.
Ajay Kumar, Manel Fernàndez, Ivone Jiménez‐Munt, Montserrat Torne, Jaume Vergés, Juan Carlos Afonso   +5 more
doaj   +1 more source

Effects of mining subsidence observed by time-lapse seismic reflection profiling [PDF]

, 1995
Extracting coal from underground mineworkings causes the overlying rocks to subside with associated changes in the stress regime. The aim of the study reported here was to apply the surface seismic reflection method to study the effect of subsidence on ...
Al-Rawahy, Salim Y.S.
core  

Weak‐Story Mitigation and Drift Redistribution in Moment‐Resisting Frames Using Stepping Rocking Walls

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT This study investigates the seismic response of moment‐resisting frames retrofitted with a stepping rocking wall, with emphasis on weak‐story mitigation and residual drift reduction under both ordinary and pulse‐like ground motions. Nonlinear response‐history analyses are conducted on 9‐story and 20‐story SAC Los Angeles frames.
Mehrdad Aghagholizadeh
wiley   +1 more source