2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Antelope Valley	Nevada

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)	41

MODEL VALUES
Probability of activity	1
Minimum magnitude	6.5
Maximum magnitude	6.95
b-value	0.8

Assigned Dip	Fault-Parallel Slip Rate	Width	Annual Rate	a-value	Branch Weight
40	1.25	23.3	1.20e-03	2.186	0.2
50	1.04	19.6	8.46e-04	2.034	0.6
60	0.92	17.3	6.62e-04	1.927	0.2

Comments
Preferred vertical slip rate from dePolo (1998 #2845) and dePolo and Anderson (2000 #4471) based on an data presented by Bryant (1984 #2883). Bryant (1984 #2883) reports Holocene deposits offset up to 5.8 m; dePolo (1998 #2845) and dePolo and Anderson (2000 #4471) assumed an age of 4-12 ka (with a mean age of 8 ka) for the deposit. Dip of fault changed to 50? based on redefined regional default value (Lund, 2006).

Comments

Preferred vertical slip rate from dePolo (1998 #2845) and dePolo and Anderson (2000 #4471) based on an data presented by Bryant (1984 #2883). Bryant (1984 #2883) reports Holocene deposits offset up to 5.8 m; dePolo (1998 #2845) and dePolo and Anderson (2000 #4471) assumed an age of 4-12 ka (with a mean age of 8 ka) for the deposit. Dip of fault changed to 50? based on redefined regional default value (Lund, 2006).

Selected References
Machette, M.N., Personius, S.F., Kelson, K.I., Haller, K.M., and Dart, R.L., 1998, Map and data for Quaternary faults and folds in New Mexico: U.S. Geological Survey Open-File Report 98-521, 443 p., 1 pl., scale 1:750,000. Bryant, W.A., 1984, Evidence of recent faulting along the Antelope Valley fault zone, Mono County, California: California Division of Mines and Geology, Open-File Report 84-56, scale 1:48,000. dePolo, C.M., and Anderson, J.G., 2000, Estimating the slip rates of normal faults in the Great Basin, USA: Basin Research, v. 12, p. 227-240. 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

Machette, M.N., Personius, S.F., Kelson, K.I., Haller, K.M., and Dart, R.L., 1998, Map and data for Quaternary faults and folds in New Mexico: U.S. Geological Survey Open-File Report 98-521, 443 p., 1 pl., scale 1:750,000.
Bryant, W.A., 1984, Evidence of recent faulting along the Antelope Valley fault zone, Mono County, California: California Division of Mines and Geology, Open-File Report 84-56, scale 1:48,000.
dePolo, C.M., and Anderson, J.G., 2000, Estimating the slip rates of normal faults in the Great Basin, USA: Basin Research, v. 12, p. 227-240.
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.