2008 National Seismic Hazard Maps - Fault Parameters

2007 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Caballo fault New Mexico
MODEL VALUES
Slip rate (vertical or horizontal in mm/yr) 0.025
Probability of activity 1
Minimum magnitude 6.5
Maximum magnitude 6.64
FAULT GEOMETRY
Dip (degrees) 50/40/60
Dip direction W
Sense of slip normal
Rupture top (km) 0
Rupture bottom (km) 15
Rake (degrees) -90
Length (km) 22
Assigned Dip Fault Parallel Slip Rate Width Characteristic Magnitude Characteristic Rate Weight
40 0.04 23.3 6.64 5.92E-05 0.2
50 0.03 19.6 6.64 4.17E-05 0.6
60 0.03 17.3 6.64 3.26E-05 0.2
Comments
The preferred vertical slip rate is based on Machette (1987) and Foley and others (1988) slip rates of 0.02-0.03 mm/yr for the Caballo fault. Dip of fault changed to 50° based on redefined regional default value (Lund, 2006).
Selected References
Machette, M.N., 1987, Preliminary assessment of Quaternary faulting near Truth or Consequences, New Mexico: U.S. Geological Survey Open-File Report 87-652, 40 p.
Foley, L.L., LaForge, R.C., and Piety, L.A., 1988, Seismotectonic study for Elephant Butte and Caballo Dams, Rio Grande Project, New Mexico: U.S. Bureau of Reclamation Seismotectonic Report 88-9, 60 p., 1 pl., 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.