Photograph by Bob
Smith, University of Utah, summer 2001.
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.
