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Hydrologically Induced Deformation in Long Valley Caldera and Adjacent Sierra Nevada

Silverii, F.ORCIDiD
Montgomery-Brown, E. K.ORCIDiD
Borsa, A. A.ORCIDiD
Barbour, A. J.ORCIDiD
DOI: https://doi.org/10.1029/2020JB019495
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8903
Silverii, F.; Montgomery-Brown, E. K.; Borsa, A. A.; Barbour, A. J., 2020: Hydrologically Induced Deformation in Long Valley Caldera and Adjacent Sierra Nevada. In: Journal of Geophysical Research: Solid Earth, Band 125, 5, DOI: 10.1029/2020JB019495.
 
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  • Abstract
Vertical and horizontal components of GNSS displacements in the Long Valley Caldera and adjacent Sierra Nevada range show a clear correlation with hydrological trends at both multiyear and seasonal time scales. We observe a clear vertical and horizontal seasonal deformation pattern primarily attributable to the solid earth response to hydrological surface loading at large-to-regional (Sierra Nevada range) scales. Several GNSS sites, located at the eastern edge of the Sierra Nevada along the southwestern rim of Long Valley Caldera, also show significant horizontal deformation that cannot be explained by elastic deformation from surface loading. Due to the location of these sites and the strong correlation between their horizontal displacements and spring discharge, we hypothesize that this deformation reflects poroelastic processes related to snowmelt runoff water infiltrating into the Sierra Nevada slopes around Long Valley Caldera. Interestingly, this is also an area where water infiltrates to feed the local hydrothermal system, and where snowmelt-induced earthquake swarms have been recently detected.
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  • Geophysik, Extraterrestische Forschung [936]
Subjects:
Long Valley Caldera
GNSS observations
transient signal
nontectonic deformation
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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