Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics

dc.contributor.author Vandemeulebrouck, Jean
dc.contributor.author Sohn, Robert A.
dc.contributor.author Rudolph, Maxwell L.
dc.contributor.author Hurwitz, Shaul
dc.contributor.author Manga, Michael
dc.contributor.author Johnston, Malcolm J. S.
dc.contributor.author Soule, Samuel A.
dc.contributor.author McPhee, Darcy
dc.contributor.author Glen, Jonathan M. G.
dc.contributor.author Karlstrom, Leif
dc.contributor.author Murphy, Fred
dc.date.accessioned 2015-02-25T17:34:50Z
dc.date.available 2015-06-05T09:08:28Z
dc.date.issued 2014-12-05
dc.description Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 119 (2014): 8688–8707, doi:10.1002/2014JB011526. en_US
dc.description.abstract We use seismic, tilt, lidar, thermal, and gravity data from 32 consecutive eruption cycles of Lone Star geyser in Yellowstone National Park to identify key subsurface processes throughout the geyser's eruption cycle. Previously, we described measurements and analyses associated with the geyser's erupting jet dynamics. Here we show that seismicity is dominated by hydrothermal tremor (~5–40 Hz) attributed to the nucleation and/or collapse of vapor bubbles. Water discharge during eruption preplay triggers high-amplitude tremor pulses from a back azimuth aligned with the geyser cone, but during the rest of the eruption cycle it is shifted to the east-northeast. Moreover, ~4 min period ground surface displacements recur every 26 ± 8 min and are uncorrelated with the eruption cycle. Based on these observations, we conclude that (1) the dynamical behavior of the geyser is controlled by the thermo-mechanical coupling between the geyser conduit and a laterally offset reservoir periodically filled with a highly compressible two-phase mixture, (2) liquid and steam slugs periodically ascend into the shallow crust near the geyser system inducing detectable deformation, (3) eruptions occur when the pressure decrease associated with overflow from geyser conduit during preplay triggers an unstable feedback between vapor generation (cavitation) and mass discharge, and (4) flow choking at a constriction in the conduit arrests the runaway process and increases the saturated vapor pressure in the reservoir by a factor of ~10 during eruptions. en_US
dc.description.embargo 2015-06-05 en_US
dc.description.sponsorship Funding for USGS team members was provided by the USGS Volcano Hazards Program. R. Sohn's participation was supported by the WHOI Green Technology Program. M. Manga, L. Karlstrom and M. Rudolph did receive salary from the National Science Foundation to spend time on this project. en_US
dc.format.mimetype application/pdf
dc.identifier.citation Journal of Geophysical Research: Solid Earth 119 (2014): 8688–8707 en_US
dc.identifier.doi 10.1002/2014JB011526
dc.identifier.uri https://hdl.handle.net/1912/7165
dc.language.iso en_US en_US
dc.publisher John Wiley & Sons en_US
dc.relation.uri https://doi.org/10.1002/2014JB011526
dc.subject Geyser en_US
dc.subject Geophysics en_US
dc.subject Tremor en_US
dc.title Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics en_US
dc.type Article en_US
dspace.entity.type Publication
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