2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
White River Valley fault zone	Nevada

GEOMETRY
Dip (degrees)	40/50/60
Dip direction	W
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	15
Rake (degrees)	-90
Length (km)	105

MODEL VALUES
Probability of activity	1
Minimum magnitude	6.5
Maximum magnitude	7.42
b-value	0.8

Assigned Dip	Fault-Parallel Slip Rate	Width	Annual Rate	a-value	Branch Weight
40	0.07	23.3	3.39e-05	0.846	0.2
50	0.06	19.6	2.39e-05	0.694	0.6
60	0.05	17.3	1.87e-05	0.588	0.2

Comments
This fault was included in 1996 based on preliminary data from dePolo (1996, written commun.). However, dePolo (1998) and dePolo and Anderson (2000) calculated the "known" slip rate of 0.02-0.07 mm/yr based on the offset of a single-event scarp at Sawmill Canyon that is on a surface estimated to be Sangamon in age (74-200 ka) as estimated by J. Yount. These values have little meaning and may not represent even an approximation of the true slip rate. However, we use the average of possible maximums here.

Comments

This fault was included in 1996 based on preliminary data from dePolo (1996, written commun.). However, dePolo (1998) and dePolo and Anderson (2000) calculated the "known" slip rate of 0.02-0.07 mm/yr based on the offset of a single-event scarp at Sawmill Canyon that is on a surface estimated to be Sangamon in age (74-200 ka) as estimated by J. Yount. These values have little meaning and may not represent even an approximation of the true slip rate. However, we use the average of possible maximums here.