2008 National Seismic Hazard Maps - Fault Parameters

2007 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Black Rock fault zone Nevada
MODEL VALUES
Slip rate (vertical or horizontal in mm/yr) 0.19
Probability of activity 1
Minimum magnitude 6.5
Maximum magnitude 7.29
FAULT 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) 80
Assigned Dip Fault Parallel Slip Rate Width Characteristic Magnitude Characteristic Rate Weight
40 0.3 23.3 7.29 1.71E-04 0.2
50 0.25 19.6 7.29 1.20E-04 0.6
60 0.22 17.3 7.29 9.43E-05 0.2
Comments
The assigned slip rate is based on 4 m of offset of a tephra bed thought to be 18-25 ka (Dodge, 1982). Dip of fault changed to 50° based on redefined regional default value (Lund, 2006).
Selected References
Dodge, R.L., 1982, Seismic and geomorphic history of the Black Rock fault zone, northwest Nevada: Golden, Colorado School of Mines T-2593, unpublished Ph.D. dissertation, 271 p., scale 1:24,000.
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.