2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Sawyer Canyon fault	New Mexico

GEOMETRY
Dip (degrees)	60/40/50
Dip direction	E
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	15
Rake (degrees)	-90
Length (km)	8

MODEL VALUES
Probability of activity	1
Minimum magnitude	n/a
Maximum magnitude	6.15
b-value	n/a

Assigned Dip	Fault-Parallel Slip Rate	Width	Annual Rate	a-value	Branch Weight
40	0.04	23.3	1.17e-04	n/a	0.2
50	0.03	19.6	8.24e-05	n/a	0.6
60	0.03	17.3	6.45e-05	n/a	0.2

Comments
Preferred vertical slip rate is the average rate based on 21-37 m offsets of the 1.2 Ma Bandelier Tuff (Carter and Gardner, 1993; 1995). Dip of fault changed to 50? based on redefined regional default value (Lund, 2006).

Selected References
Carter, K.E., and Gardner, J.N., 1995, Quaternary fault kinematics in the northwestern Española basin, Rio Grande rift, New Mexico, in Bauer, P.W., Kues, B.S., Dunbar, N.W., Karlstrom, K.E., and Harrison, B., eds., Geology of the Santa Fe region, New Mexico: New Mexico Geological Society, 46th Field Conference, September 27-30, 1995, Guidebook, p. 97-103. Carter, K.E., and Gardner, J.N., 1993, Quaternary fault kinematics in the northern Española basin, Rio Grande rift, New Mexico—Implications for early rift development: Eos, Transactions of the American Geophysical Union, v. 74, p. 611. 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

Carter, K.E., and Gardner, J.N., 1995, Quaternary fault kinematics in the northwestern Española basin, Rio Grande rift, New Mexico, in Bauer, P.W., Kues, B.S., Dunbar, N.W., Karlstrom, K.E., and Harrison, B., eds., Geology of the Santa Fe region, New Mexico: New Mexico Geological Society, 46th Field Conference, September 27-30, 1995, Guidebook, p. 97-103.
Carter, K.E., and Gardner, J.N., 1993, Quaternary fault kinematics in the northern Española basin, Rio Grande rift, New Mexico—Implications for early rift development: Eos, Transactions of the American Geophysical Union, v. 74, p. 611.
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.