Episodic Earthquake Swarms in the Mineral Mountains, Utah Driven by the Roosevelt Hydrothermal System
Abstract
Abstract Over 1,000 earthquakes (−2.0 < M < 2.0), identified using a matched‐filter method, occurred in the Mineral Mountains, Utah between 2016 and 2019. The enhanced catalog is complete down to M −0.9 and contains roughly 15 times more events than originally cataloged. Earthquake relocation of ∼800 earthquakes shows that activity is concentrated in a <2 km long E‐W striking narrow zone, ∼4 km east of the Roosevelt hydrothermal system. Two fault orientations, both N‐S and E‐W parallel to the Opal Mound and Mag Lee faults, respectively, are observed after computing composite focal mechanisms of highly similar earthquakes. Looking solely at the temporal distribution of the seismicity, we identify 15 periods of swarm‐like activity, with two major clusters occurring in December 2016, recorded by three stations, and in October 2019 recorded by eight stations. The October 2019 swarm, the best recorded sequence in the area, provides evidence for the underlying triggering mechanism. We show that a complex mechanism of fluid diffusion and aseismic slip is responsible for the swarm evolution with migration velocities reaching 10 km/day. We hypothesize that these episodic swarms in the Mineral Mountains are primarily driven by migrating fluids that originate within the Roosevelt hydrothermal system.
- Authors:
-
[1];
[1];
[1];
[1]
- Univ. of Utah, Salt Lake City, UT (United States). Univ. of Utah Seismograph Stations
- Publication Date:
- Research Org.:
- Univ. of Utah, Salt Lake City, UT (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1848472
- Alternate Identifier(s):
- OSTI ID: 1786232
- Grant/Contract Number:
- EE0007080; DE‐EE0007080
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Solid Earth
- Additional Journal Information:
- Journal Volume: 126; Journal Issue: 6; Journal ID: ISSN 2169-9313
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Geochemistry & Geophysics
Citation Formats
Mesimeri, Maria, Pankow, Kristine L., Baker, Ben, and Hale, J. Mark. Episodic Earthquake Swarms in the Mineral Mountains, Utah Driven by the Roosevelt Hydrothermal System. United States: N. p., 2021.
Web. doi:10.1029/2021jb021659.
Mesimeri, Maria, Pankow, Kristine L., Baker, Ben, & Hale, J. Mark. Episodic Earthquake Swarms in the Mineral Mountains, Utah Driven by the Roosevelt Hydrothermal System. United States. https://doi.org/10.1029/2021jb021659
Mesimeri, Maria, Pankow, Kristine L., Baker, Ben, and Hale, J. Mark. Thu .
"Episodic Earthquake Swarms in the Mineral Mountains, Utah Driven by the Roosevelt Hydrothermal System". United States. https://doi.org/10.1029/2021jb021659. https://www.osti.gov/servlets/purl/1848472.
@article{osti_1848472,
title = {Episodic Earthquake Swarms in the Mineral Mountains, Utah Driven by the Roosevelt Hydrothermal System},
author = {Mesimeri, Maria and Pankow, Kristine L. and Baker, Ben and Hale, J. Mark},
abstractNote = {Abstract Over 1,000 earthquakes (−2.0 < M < 2.0), identified using a matched‐filter method, occurred in the Mineral Mountains, Utah between 2016 and 2019. The enhanced catalog is complete down to M −0.9 and contains roughly 15 times more events than originally cataloged. Earthquake relocation of ∼800 earthquakes shows that activity is concentrated in a <2 km long E‐W striking narrow zone, ∼4 km east of the Roosevelt hydrothermal system. Two fault orientations, both N‐S and E‐W parallel to the Opal Mound and Mag Lee faults, respectively, are observed after computing composite focal mechanisms of highly similar earthquakes. Looking solely at the temporal distribution of the seismicity, we identify 15 periods of swarm‐like activity, with two major clusters occurring in December 2016, recorded by three stations, and in October 2019 recorded by eight stations. The October 2019 swarm, the best recorded sequence in the area, provides evidence for the underlying triggering mechanism. We show that a complex mechanism of fluid diffusion and aseismic slip is responsible for the swarm evolution with migration velocities reaching 10 km/day. We hypothesize that these episodic swarms in the Mineral Mountains are primarily driven by migrating fluids that originate within the Roosevelt hydrothermal system.},
doi = {10.1029/2021jb021659},
journal = {Journal of Geophysical Research. Solid Earth},
number = 6,
volume = 126,
place = {United States},
year = {Thu May 20 00:00:00 EDT 2021},
month = {Thu May 20 00:00:00 EDT 2021}
}
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