Shallow Active-Source Seismic Modeling of Old Faithful Geyser in the Upper Geyser Basin of Yellowstone National Park Using a Dense Seismic Array
Session: Recent Development in Ultra-Dense Seismic Arrays with Nodes and Distributed Acoustic Sensing [Poster]
Type: Poster
Date: 4/20/2021
Presentation Time: 04:15 PM Pacific
Description:
The Upper Geyser Basin of Yellowstone National Park consists of active geysers which erupt hydrothermal water from a subsurface reservoir, the most famous of which is Old Faithful. To image the Old Faithful hydrothermal system, we process 2-D and 3-D active-source seismic data recorded in November 2016 using a densely spaced seismic array. Our 3-D array consists of 521 receivers and 343 shot locations. Our 2-D line trends SW-NE, centered on Old Faithful Geyser, with 39 receivers and 39 shot locations. Typically, ~5 shots were stacked at each location in order to increase signal to noise ratio. Both arrays have a station spacing of ~25m, but there is a ~100m gap in any direction from the Old Faithful Geyser orifice. The source in this experiment was a 12lb sledgehammer striking a metal plate. Our receivers are 3-component, 5-Hz Magseis Fairfield Z-Land seismometers recording at 1000Hz. We pick refracted P-wave first arrivals and invert the picks to create a velocity model and tomographic profiles. We aim to visualize changes in lithology around Old Faithful geyser and the subsurface plumbing system in greater detail than previous studies. Results from our 2-D tomographic profile show slight differences from previous studies, with the P-wave refraction profiles allowing for more detailed lateral interpretation. We also present preliminary 3-D tomographic models. Tomographic models and profiles contribute to scientific understanding of the shallow subsurface structure of the Old Faithful hydrothermal system by allowing us to visualize in 2-D and 3-D anomalous velocity structure which we contribute to hydrothermal activity.
Presenting Author: Jordan R. Caylor
Student Presenter: Yes
Authors
Jordan Caylor Presenting Author Corresponding Author jrcaylor@miners.utep.edu University of Texas at El Paso |
Marianne Karplus mkarplus@utep.edu The University of Texas at El Paso |
Jamie Farrell jamie.farrell@utah.edu The University of Utah |
Stephen Veitch saveitch@utep.edu The University of Texas at El Paso |
Galen Kaip gkaip@utep.edu The University of Texas at El Paso |
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Shallow Active-Source Seismic Modeling of Old Faithful Geyser in the Upper Geyser Basin of Yellowstone National Park Using a Dense Seismic Array
Category
Recent Development in Ultra-Dense Seismic Arrays with Nodes and Distributed Acoustic Sensing