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A volunteer and a US Geological Survey employee
conduct a leveling survey north of Fountain Paint
Pot. Photograph by David E. Wieprecht on September
1996.
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Volunteers and a US Geological Survey employee
conduct a leveling survey in Hayden Valley.
Photograph by David E. Wieprecht on September 1988.
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Photograph of the Tantalus Creek gauging site. More
than 97 percent of the outflow from Norris Geyser
Basin exits via Tantalus Creek. The discharge from
Tantalus Creek is monitored by a weir located about
100 meters from the confluence of Tantalus Creek with
the Gibbon River. Photograph by Irving Friedman.
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A University of Utah- Swiss post doctoral fellow is lugging a seismometer
barrel to a new seismograph station being installed near Old Faithful, Yellowstone
National Park. Photograph by Bob Smith, University of Utah, 2001.
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University of Utah and University of Oregon students install a broadband
seismometer as part of the Yellowstone Hotspot Geodynamics
project in a gravel pit near Lewis Lake in 2000. Data from these
temporarily deployed seismographs are used to monitor
Yellowstone's earthquakes and to create seismic "CAT scans" of
Yellowstone's crust and mantle magma plumbing chambers. Photograph
by Bob Smith, University of Utah, 2000.
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A high-precision Global Positioning Systems (GPS) antenna used to monitor horizontal and vertical ground motions of the Yellowstone caldera, Yellowstone National Park. This is one of 60 sites that are periodically observed and used to measure how the Yellowstone caldera moves up and down in response to magmatic fluid transport of the Yellowstone volcanic system. Photograph by Bob Smith, University of Utah, August 2000.
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Scientists take gas samples at Washburn Hot Springs to measure
sulfur-gas emissions from this thermal area. Photograph by David E. Wieprecht, September
1998.
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High-precision GPS antenna for receiving the signals
from orbiting GPS satellites at Lake Junction,
Yellowstone. It is connected to the earth by a
specially installed 2" Invar rod. This is a special
antenna that shields out extraneous microwave signals
and allows the precision of measuring ground
movements to millimeters. Photograph by Bob Smith, University of
Utah, summer 2001.
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The Lake seismic and GPS observatory. This facility houses a modern
digital recording seismograph operated cooperatively by the University of Utah with
the USGS National Earthquake Center. The site also
includes a high-precision, continuous-recording, GPS receiver.
Data from both instruments are transmitted in real-time by satellite (satellite dish
shown). From the GPS information, the position of the earth at
this point can be determined to a high precision of centimeters. By
comparing the positions of the station with time, scientists
can determine the velocity of the ground motion that can be affected
by magma flow and plate motions. Photograph by Bob
Smith, University of Utah, summer 2001.
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Modern broadband seismometer installed at Lake
Junction, Yellowstone, designed to record three
components of ground montion. This seismograph records shear waves
that are sensitive to fluid flow such as in hydrothermal and magmatic
volcanic systems. Photograph by Bob Smith, University of Utah, summer 2001.
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An engineer from the University of Utah is preparing to install a modern,
digitally recorded seismometer near Old Faithful, Yellowstone. Photograph by David
Drobeck, University of Utah, 2001.
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A University of Utah engineer (atop tree in the middle of the photo) is
installing a modern spread-spectrum radio relay antenna for transmitting digitally
recorded seismograph data from a seismometer, buried in the
ground at the bottom of the tree. Photograph by Dave Drobeck,
University of Utah, 2001.
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