2008 National Seismic Hazard Maps - Fault Parameters

2007 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Caballo fault Texas
MODEL VALUES
Slip rate (vertical or horizontal in mm/yr) 0.11
Probability of activity 1
Minimum magnitude 6.5
Maximum magnitude 6.97
FAULT GEOMETRY
Dip (degrees) 50/60/40
Dip direction SW
Sense of slip normal
Rupture top (km) 0
Rupture bottom (km) 15
Rake (degrees) -90
Length (km) 42
Assigned Dip Fault Parallel Slip Rate Width Characteristic Magnitude Characteristic Rate Weight
40 0.17 23.3 6.97 1.59E-04 0.2
50 0.14 19.6 6.97 1.12E-04 0.6
60 0.13 17.3 6.97 8.74E-05 0.2
Comments
The preferred vertical slip rate is based on 24 m offset of middle Pleistocene deposits that are 130-500 ka (Collins and Raney, 1993). Dip of fault changed to 50° based on redefined regional default value (Lund, 2006).
Selected References
Collins, E.W., and Raney, J.A., 1993, Late Cenozoic faults of the region surrounding the Eagle Flat study area, northwestern trans-Pecos Texas: Technical report to Texas Low-Level Radioactive Waste Disposal Authority, under Contract IAC(92-93)-0910, 74 p.
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.