2008 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Ruby Mountains fault zone, south Nevada
GEOMETRY
Dip (degrees) 60/50/40
Dip direction W
Sense of slip normal
Rupture top (km) 0
Rupture bottom (km) 15
Rake (degrees) -90
Length (km) 53
MODEL VALUES
Probability of activity 1
Minimum magnitude 6.5
Maximum magnitude 7.08
b-value 0.8
Assigned Dip Fault-Parallel Slip Rate Width Annual Rate a-value Branch Weight
40 0.44 23.3 3.48e-04 1.615 0.2
50 0.37 19.6 2.45e-04 1.463 0.6
60 0.32 17.3 1.92e-04 1.356 0.2
Comments
The slip rate used in 1996 was based on dePolo (1996, written commun.). The slip rate used here is from dePolo (1998) and dePolo and Anderson (2000) and is based on the observed offset of 20.8 m and inferred age of the offset deposit of 74 ka (Willoughby, 1997).