Results 11 to 20 of about 1,245 (189)

Seismic Exploration Methods for Structural Studies and for Active Fault Characterization: A Review

open access: yesApplied Sciences, 2023
In this paper, seismic exploration methods are reviewed with a particular emphasis on the use of the reflection seismology to investigate the subsurface structures and characterize active faults.
Pier Paolo G. Bruno
doaj   +1 more source

Structured regularization based velocity structure estimation in local earthquake tomography for the adaptation to velocity discontinuities

open access: yesEarth, Planets and Space, 2022
We propose a local earthquake tomography method that applies a structured regularization technique to determine sharp changes in Earth’s seismic velocity structure using arrival time data of direct waves.
Yohta Yamanaka   +5 more
doaj   +1 more source

MLReal: Bridging the gap between training on synthetic data and real data applications in machine learning

open access: yesArtificial Intelligence in Geosciences, 2022
Among the biggest challenges we face in utilizing neural networks trained on waveform (i.e., seismic, electromagnetic, or ultrasound) data is its application to real data.
Tariq Alkhalifah   +2 more
doaj   +1 more source

Back‐Projection Imaging of Extended, Diffuse Sources of Volcano‐Tectonic Seismicity During June 2010 at Sierra Negra Volcano, Galápagos

open access: yesGeochemistry, Geophysics, Geosystems, 2018
Seismic signals generated by subsurface volcano‐tectonic processes commonly have low signal‐to‐noise ratios that make it difficult to resolve both 3‐D subsurface structures and seismic source locations using established seismic imaging methods (e.g ...
C. L. Kelly, J. F. Lawrence
doaj   +1 more source

The Orthotropy Effect of Underground Inclusion on the Seismic Response of Ground Surface [PDF]

open access: yesمهندسی عمران شریف
This paper presents a formulation of the attenuated orthotropic time-domain half-space boundary element method for analyzing the orthotropic effect of underground inclusions subjected to transient SH-waves.
S. Mojtabazadeh-Hasanlouei   +2 more
doaj   +1 more source

Seismic Structure of the Upper Mantle Beneath Eastern Asia From Full Waveform Seismic Tomography

open access: yesGeochemistry, Geophysics, Geosystems, 2018
To better understand the subsurface behavior of subducting slabs and their relation to the tectonic evolution of the overriding plate, we conduct a full waveform inversion on a large data set to determine a high‐resolution seismic model, FWEA18 (Full ...
Kai Tao, Stephen P. Grand, Fenglin Niu
doaj   +1 more source

Rôle of Digital Computers in Exploration Seismology [PDF]

open access: yesThe Journal of the Acoustical Society of America, 1967
In exploration, seismology surface sound sources and detectors are utilized to indicate variations in the elastic properties of the subsurface of the earth and from these infer the geological structure. It is helpful to pose the basic problem in a form that is common to most scientific investigations.
Roger D. Judson, J. W. C. Sherwood
openaire   +1 more source

Using Deep Learning for Flexible and Scalable Earthquake Forecasting

open access: yesGeophysical Research Letters, 2023
Seismology is witnessing explosive growth in the diversity and scale of earthquake catalogs. A key motivation for this community effort is that more data should translate into better earthquake forecasts. Such improvements are yet to be seen.
Kelian Dascher‐Cousineau   +3 more
doaj   +1 more source

Imaging disturbance zones ahead of a tunnel by elastic full-waveform inversion: Adjoint gradient based inversion vs. parameter space reduction using a level-set method

open access: yesUnderground Space, 2018
We present and compare two flexible and effective methodologies to predict disturbance zones ahead of underground tunnels by using elastic full-waveform inversion.
Andre Lamert   +3 more
doaj   +1 more source

A Python framework for efficient use of pre-computed Green's functions in seismological and other physical forward and inverse source problems [PDF]

open access: yesSolid Earth, 2019
The finite physical source problem is usually studied with the concept of volume and time integrals over Green's functions (GFs), representing delta-impulse solutions to the governing partial differential field equations.
S. Heimann   +10 more
doaj   +1 more source

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