Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 17 of 17 for “"seismic interferometry"”.
-
Estimating intrinsic attenuation from seismic interferometry and time reversal
Includes bibliographical references (pages 45-49).
-
Learning Structures : fusing deconvolution-based seismic interferometry with Bayesian inference for structural health assessment
… and damage detection via fusing the concepts of seismic interferometry and Bayesian inference. Firstly, a deconvolution-based seismic interferometry approach is employed to obtain the wave-forms that represent the impulse response functions (IRFs) with respect to a reference excitation source. …
-
Body and surface wave ambient noise seismic interferometry across the Salton Sea Geothermal Field, California
… gathers were generated using the principles of seismic interferometry from 135 hours of ambient noise recorded during a controlled-source survey across the Salton Sea Geothermal Field in southern California. The non-uniform nature of the noise sources violated a primary assumption of the method …
-
Enhanced imaging of deep lithospheric and shallow near surface structures through innovations in seismic interferometry and array processing.
… four studies that develop and apply passive seismic imaging methods to investigate Earth structure across a range of scales, from the shallow near-surface to the deep upper mantle. The first study uses array analysis of ambient noise autocorrelograms recorded by a dense nodal array near …
-
Combining body wave tomography, surface wave inversion, seismic interferometry and laboratory measurements to characterize the black shales on Bornholm at different scales
… of the worldwide energy supply. An integrated seismic investigation of the Lower Palaeozoic black shales was carried out at the Danish island Bornholm to locate the shallow-lying Alum Shale layer and its surrounding formations and to characterize its potential as a source rock. Therefore, two …
-
Learning Seismic Waves for Imaging the Earth
This thesis studies imaging Earth’s interior with seismic wavefields for seismic exploration and monitoring, and shows applications of deep learning in solving challenges in seismic imaging with either active or passive seismic data. For active data, we develop deep-learning methods to extrapolate …
-
The Green's function for the diffusion coefficient
… in both one dimension and three dimensions using seismic interferometry. This paper attempts to recover the diffusion coefficient for a realistic source distribution taken from a microseismic dataset from a geothermal field in Indonesia. This dataset did not have an ideal distribution of sources, …
-
Wave propagation in complex media, scattering theory, and application to seismic imaging
Migration is a seismic imaging method that consists of creating a representation of the Earth's subsurface structure from the recording of seismic waves. Migration is essentially equivalent to solving an inverse scattering problem in structurally complex media. Conventional migration algorithms …
-
Monitoring and Imaging Seismic Velocity Changes Across Temporal and Spatial Scales
Relative changes in seismic velocity (dv/v) are associated with changes in mechanical properties of crustal materials, and can reflect the perturbations in stress fields, rock damage, and fluid content. Interferometry of seismic ambient noise enables the continuous monitoring of dv/v. In this …
-
Ambient seismic noise tomography of the southern United States and seismic inversion with dictionary learning using unsupervised machine learning.
Seismic tomography and inversion are well-established methods to understand deep subsurface structures. These techniques are particularly effective in delineating complex crustal architectures, which often deviate from simplified textbook models. High-resolution seismic tomography enables the …
-
Combination of Borehole Seismic and Downhole Logging to Investigate the Vicinity of the COSC‑1 Borehole in Western Scandinavia
In dieser Arbeit werden bohrlochseismsiche Messungen sowohl mit Bohrlochmessungen als auch mit oberflächenseismischen Messungen ausgewertet und verglichen um das bohrlochnahe Umfeld der Forschungsbohrung COSC-1 (Collisional Orogeny in the Scandinavian Caledonides) zu beschreiben. Die …
-
Topics in diffuse field ultrasonics
Random wave fields that have explored large volumes over long times contain much information. Studying these diffuse fields and extracting the information contained in them are the primary aims of Diffuse Field Theory. When the waves of interest are elastic waves at frequencies above 20kHz, the …