Imaging volcanic systems using the ambient seismic field
Abstract/Contents
- Abstract
- With recent scientific advances, and bettering of computers, seismic imaging has taken monumental steps forward. Cross-correlating ambient seismic noise, for instance, is now capable of providing as much, if not more, reliable information about the subsurface than traditional tomographic imaging, which required large, easily observable signals to measure seismic wavespeeds through regions of interest. This traditional technique typically suffers from an inherent bias in places that can be imaged (due to local seismicity), and places that cannot be imaged (due to a lack of seismicity). In this thesis, I advance the processing used to extract coherent energy, and therefore information, from the ambient seismic field, rather than known large signals. Doing this provides a novel way to image a region of the crust without waiting for large signals. In bettering this methodology, I seek to provide more stable Noise Correlation Functions (NCFs) than had ever been obtained before, using as little seismic data as possible. I then use this advancement to seismically image two volcanic settings: the Yellowstone Volcanic Field, and the Sierra Negra shield volcano in the Galapagos Islands. Through this three-dimensional ambient noise tomography, I provide highresolution images of the subsurface structure at these regions. Then, to further improve depth resolution of my imaging at Yellowstone, I jointly invert the ambient noise tomographic results with teleseismic receiver function analysis. Finally, due to the temporal stability of the NCFs, I analyze and observe time-lapsed ambient noise tomographic images at Yellowstone.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2015 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Seats, Kevin Joseph |
|---|---|
| Associated with | Stanford University, Department of Geophysics. |
| Primary advisor | Lawrence, Jesse |
| Thesis advisor | Lawrence, Jesse |
| Thesis advisor | Beroza, Gregory C. (Gregory Christian) |
| Thesis advisor | Dunham, Eric |
| Advisor | Beroza, Gregory C. (Gregory Christian) |
| Advisor | Dunham, Eric |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Kevin Joseph Seats. |
|---|---|
| Note | Submitted to the Department of Geophysics. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2015. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2015 by Kevin Joseph Seats
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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