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Seismic Wavefield Imaging of the Earth: The Regional, the Local, and the Remote

Citation

Castellanos, Jorge Alberto Castillo (2022) Seismic Wavefield Imaging of the Earth: The Regional, the Local, and the Remote. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/fm32-1t74. https://resolver.caltech.edu/CaltechTHESIS:07192021-182024547

Abstract

In this thesis, I use seismic wavefield methods to illuminate the interior structure and the dynamics of the Earth across different scales. First, I image the large-scale lithospheric structure at the eastern sector of the Trans-Mexican Volcanic Belt to constrain on the transition from flat to steeper subduction in central Mexico. Then, I move to a regional scale and image the dynamics of the Wallowa Mountain block in northeastern Oregon, where mantle-based stresses appear to have played an essential role in shaping the crustal structure. With the findings of this investigation, I was able to illuminate a deformation mechanism of mantle origin, which I also use here to explain other near-surface processes in different parts of the North America continent. After, I move to a local scale, where I use dense oil-industry instrumentation to image the sub-kilometer crustal structure of Long Beach, California. In the first part of this investigation, I use noise-derived surface waves to create a high-resolution shear wave velocity model of the first kilometer of the crust, which I use to numerically determine the variability in the expected ground shaking intensity of the area. In the second part, I move past the traditional surface wave analysis and use the body wave portion of the noise-derived Green's functions to create a high-resolution compressional wave velocity model beneath one of the surveys. Finally, I present a waveform-based method of analysis that shows great promise as a new way of investigating the seismic behavior and the physical conditions of isolated marine environments.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Seismology, Ambient noise, Seismic Imaging
Degree Grantor:California Institute of Technology
Division:Geological and Planetary Sciences
Major Option:Geophysics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Clayton, Robert W.
Thesis Committee:
  • Jackson, Jennifer M. (chair)
  • Zhan, Zhongwen
  • Gurnis, Michael C.
  • Ross, Zachary E.
  • Clayton, Robert W.
Defense Date:8 July 2021
Non-Caltech Author Email:jcastillo (AT) google.com
Record Number:CaltechTHESIS:07192021-182024547
Persistent URL:https://resolver.caltech.edu/CaltechTHESIS:07192021-182024547
DOI:10.7907/fm32-1t74
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2018JB015783DOIArticle adapted for Chapter 2.
https://doi.org/10.1126/sciadv.abb0476DOIArticle adapted for Chapter 3.
https://doi.org/10.1029/2019JB018855DOIArticle adapted for Chapter 6.
https://doi.org/10.1029/2019JB018941DOIArticle adapted for Chapter 7.
ORCID:
AuthorORCID
Castellanos, Jorge Alberto Castillo0000-0002-0103-6430
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14308
Collection:CaltechTHESIS
Deposited By: Jorge Castillo Castellanos
Deposited On:30 Jul 2021 19:02
Last Modified:18 Aug 2021 23:32

Thesis Files

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