2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Lone Mountain fault zone	Nevada

GEOMETRY
Dip (degrees)	60/40/50
Dip direction	W
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	0.20	23.3	1.94e-04	1.395	0.2
50	0.17	19.6	1.37e-04	1.243	0.6
60	0.15	17.3	1.07e-04	1.136	0.2

Comments
The assigned slip rate was calculated by dePolo (1998) based on field data from Yount (1997, written comm., as reported in dePolo, 1998). The slip rate is derived from offset across a 3.2-m-high scarp (presumably a multiple-event scarp) on a latest Pleistocene (15 to 30 ka) fluvial terrace along the fault west of Lone Mountain. DePolo (1998) and dePolo and Anderson (2000) calculated a preferred vertical slip rate of 0.13 mm/yr (using a preferred vertical offset of 2.9 m from Yount's original data) and preferred age of the deposit of 22.5 k.y.

Comments

The assigned slip rate was calculated by dePolo (1998) based on field data from Yount (1997, written comm., as reported in dePolo, 1998). The slip rate is derived from offset across a 3.2-m-high scarp (presumably a multiple-event scarp) on a latest Pleistocene (15 to 30 ka) fluvial terrace along the fault west of Lone Mountain. DePolo (1998) and dePolo and Anderson (2000) calculated a preferred vertical slip rate of 0.13 mm/yr (using a preferred vertical offset of 2.9 m from Yount's original data) and preferred age of the deposit of 22.5 k.y.