2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Teton fault	Wyoming

GEOMETRY
Dip (degrees)	50/40/60
Dip direction	E
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	15
Rake (degrees)	-90
Length (km)	62

MODEL VALUES
Probability of activity	1
Minimum magnitude	6.5
Maximum magnitude	7.16
b-value	0.8

Assigned Dip	Fault-Parallel Slip Rate	Width	Annual Rate	a-value	Branch Weight
40	2.02	23.3	1.41e-03	2.312	0.2
50	1.70	19.6	9.96e-04	2.159	0.6
60	1.50	17.3	7.79e-04	2.053	0.2

Comments
Preferred vertical slip rate based on Gilbert and others (1983). Smith and others (1993) estimated a similar average rate of 1.0-1.4 mm/yr for the past 2 Ma. Dip of fault changed to 50? based on redefined regional default value (Lund, 2006).

Selected References
Gilbert, J.D., Ostenaa, D., and Wood, C., 1983, Seismotectonic study of Jackson Lake Dam and Reservoir, Minidoka Project, Idaho-Wyoming: U.S. Bureau of Reclamation Seismotectonic Report 83-8, 123 p., 11 pl. Smith, R.B., Byrd, J.D.O., and Susong, D.D., 1993, The Teton fault, Wyoming—Seismotectonics, Quaternary history, and earthquake hazards, in Snoke, A.W., Steidtmann, J.R., and Roberts, S.M., eds., Geology of Wyoming: Geological Survey of Wyoming Memoir No. 5, p. 628-667. Lund, W.R., ed., 2006, Basin and Range Province Earthquake Working Group seismic-hazard recommendations to the U.S. Geological Survey National Seismic Hazard Mapping Program: Utah Geological Survey Open-File Report 477, 23 p, ugspub.nr.utah.gov/publications/open_file_reports/OFR-477.pdf.

Selected References

Gilbert, J.D., Ostenaa, D., and Wood, C., 1983, Seismotectonic study of Jackson Lake Dam and Reservoir, Minidoka Project, Idaho-Wyoming: U.S. Bureau of Reclamation Seismotectonic Report 83-8, 123 p., 11 pl.
Smith, R.B., Byrd, J.D.O., and Susong, D.D., 1993, The Teton fault, Wyoming—Seismotectonics, Quaternary history, and earthquake hazards, in Snoke, A.W., Steidtmann, J.R., and Roberts, S.M., eds., Geology of Wyoming: Geological Survey of Wyoming Memoir No. 5, p. 628-667.
Lund, W.R., ed., 2006, Basin and Range Province Earthquake Working Group seismic-hazard recommendations to the U.S. Geological Survey National Seismic Hazard Mapping Program: Utah Geological Survey Open-File Report 477, 23 p, ugspub.nr.utah.gov/publications/open_file_reports/OFR-477.pdf.