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): |
| |||||||||||||||
Thesis Committee: |
| |||||||||||||||
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: |
| |||||||||||||||
ORCID: |
| |||||||||||||||
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: | 04 Aug 2022 21:08 |
Thesis Files
PDF
- Final Version
See Usage Policy. 145MB |
Repository Staff Only: item control page