Horizontal Ground Motion and Time Series
Yellowstone, Snake River Plain, and Wasatch Fault (1997-2005)
(Click station name to view time series)
We estimate site velocity using ADDNEQ, a program that was developed to compute multi-session solutions from the combination of a set of single-session normal equations (.NEQ). We use an absolute-free strategy, where velocities are estimated with respect to a stable North American velocity frame that was obtained from the WUSC velocity solution.
The station time-series plots show the residuals of the ITRF2000 velocity field, together with daily weighted rms (one-sigma).
Data from continuous GPS stations operated by the University of Utah and other geoetic networks, including BARGEN , NGS-CORS, the Idaho National Laboratory (INL), and the Plate Boundary Observatory (PBO).
Error ellipses show two standard-deviations (95% confident intervals).
Stations with green circles do not have enough data (< one year) to obtain accurate velocity vectors.
3-D velocity solution in a stable North America reference frame.
Horizontal velocity vectors in GMT format.
Go to Seismology and Active Tectonics home page
Go to the permanent GPS network information page
For questions regarding this page, contact
Wu-Lung Chang: email@example.com