HR: 09:15h
AN: V31B-06 [PDF]
TI: Seismic and GPS Monitoring of the 2003 Norris Geyser Basin Hydrothermal Disturbance, Yellowstone
National Park
AU: * Farrell, J M
EM: jfarrell@mines.utah.edu
AF: University of Utah, Dept. Geol. & Geophys.
135 S. 1460 E., Salt Lake City, UT 84112
AU: Waite, G P
EM: gpwaite@mines.utah.edu
AF: University of Utah, Dept. Geol. & Geophys.
135 S. 1460 E., Salt Lake City, UT 84112
AU: Smith, R B
EM: rbsmith@mines.utah.edu
AF: University of Utah, Dept. Geol. & Geophys.
135 S. 1460 E., Salt Lake City, UT 84112
AU: Puskas, C M
EM: cmpuskas@mines.utah.edu
AF: University of Utah, Dept. Geol. & Geophys.
135 S. 1460 E., Salt Lake City, UT 84112
AU: Heasler, H
EM: Henry_Heasler@contractor.nps.gov
AF: YCR, Yellowstone National Park, Mammoth, WY 82190
AU: Bartel, B
EM: bebartel@unavco.edu
AF: UNAVCO, 3340 Mitchel Lane, Boulder, CO 80301
AU: Dietel, C
EM: dietel@usgs.gov
AF: USGS, 345 Middlefield Rd., Menlo Park, CA 94025
AB:
Norris geyser basin experienced an unexpected change in normal geyser and hot spring activity beginning July 2003. This
disturbance included an increase in ground temperatures of up to $94\deg$C over a 0.1 km $^{2}$ area killing vegetation
along a ~200 m long zone and prompted closure of the area to visitors. In response to these changes, a temporary seismic and
geodetic monitoring network was deployed by the Yellowstone Volcano Observatory with the assistance of UNAVCO and IRIS. Data
collection began in August 2003, with a dense, 0.75 km $^{2}$, array of 7 broadband seismographs and 5 precision GPS stations
across the disturbed area. Results from the seismic monitoring should allow us to track the presence and movement of
hydrothermal fluids, while the GPS data should indicate if ground deformation accompanied seismic or hydrothermal activity.
Together with ancillary temperature and fluid flow data by the NPS, this information will help identify the size and location
of the source of hydrothermal related deformation. We hope to track the progress of the disturbance to better understand the
hydrothermal and tectonic processes involved and to capture any hydrothermal eruption, should one occur.
DE: 1208 Crustal movements--intraplate (8110)
DE: 7280 Volcano seismology (8419)
DE: 8400 VOLCANOLOGY
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting