Results 21 to 30 of about 15,948 (253)

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

The Current State-Of-The-Art In Active Region Seismology [PDF]

open access: yes, 2012
Helioseismology is the study of the variations in the internal structure and properties of the dynamics of the Sun from measurements of its surface oscillations.
Moradi, Hamed
core   +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

Toward detailed prominence seismology [PDF]

open access: yesAstronomy & Astrophysics, 2011
Context. Prominence seismology exploits our knowledge of the linear eigenoscillations for representative magnetohydro- dynamic models of filaments. To date, highly idealized models for prominences have been used, especially with respect to the overall magnetic configurations. Aims.
Blokland, J.W. S., Keppens, R.
openaire   +3 more sources

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

Wave chaos in rapidly rotating stars [PDF]

open access: yes, 2008
Effects of rapid stellar rotation on acoustic oscillation modes are poorly understood. We study the dynamics of acoustic rays in rotating polytropic stars and show using quantum chaos concepts that the eigenfrequency spectrum is a superposition of ...
A. Baglin   +7 more
core   +2 more sources

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