Table 1: Wasatch Front strain rates from geodetic, seismic, and geologic determinations.


Method Source Least (Top) and Greatest Principal Strain Rate (µstrain/yr) Horizontal Displacement and Slip Rates (mm/yr) Orientation of Least Principal Strain Rate or Stress (degrees from N)
Geodetic

This study: GPS only [1992-1995]

0.049 ± 0.023
-0.033 ± 0.020
2.7 ± 1.3 (55 km) 59° ± 15°
This study: GPS-Trilateration [1970-1994] 0.054 ± 0.014
-0.017 ± 0.012
3.0 ± 0.8 (55 km) 74° ± 8°
This study: GPS-Trilateration-Trilateration [1962-1994] 0.051 ± 0.009
0.005 ± 0.008
2.8 ± 0.5 (55 km) 73° ± 7°
Savage et al. [1992] 0.047 ± 0.011 2.6 ± 0.6 90° ± 5°
Late Quaternary Slip Rates Summarized by McCalpin and Nishenko
[1996]
0.35-2.0 (dependent on fault segment) E-W (perpendicular to fault strike)
Seismic Moments Eddington et al. [1987] 0.0041 (northern Wasatch)
0.0012 (southern Wasatch)
0.13
0.04
78°
76°
Stress Indicators Zoback [1989] NW-SE