2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Railroad Valley fault zone	Nevada

GEOMETRY
Dip (degrees)	50/60/40
Dip direction	W
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	15
Rake (degrees)	-90
Length (km)	159

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

Assigned Dip	Fault-Parallel Slip Rate	Width	a-value	Branch Weight
40	0.11	23.3	n/a	0.2
50	0.09	19.6	n/a	0.6
60	0.08	17.3	n/a	0.2

Comments
This fault was assigned a slip rate of 0.1 mm/yr in 1996 based on preliminary data from dePolo (1996, written commun.). The 2002 slip rate is from dePolo (1998) and dePolo and Anderson (2000) and is based on the preferred value of an observed offset of 14 m and inferred age of the offset deposit of 200 ka. These data yield a slip rate substantially higher than the 0.01 mm/yr that is reported in Appendix E of dePolo (1998), based on slip rate-basal facet relations. The higher rate is retained here. Characteristic magnitude fixed at M7.5.

Comments

This fault was assigned a slip rate of 0.1 mm/yr in 1996 based on preliminary data from dePolo (1996, written commun.). The 2002 slip rate is from dePolo (1998) and dePolo and Anderson (2000) and is based on the preferred value of an observed offset of 14 m and inferred age of the offset deposit of 200 ka. These data yield a slip rate substantially higher than the 0.01 mm/yr that is reported in Appendix E of dePolo (1998), based on slip rate-basal facet relations. The higher rate is retained here. Characteristic magnitude fixed at M7.5.