2008 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Boulder Creek fault, Kendall scarp Washington
GEOMETRY
Dip (degrees) 60
Dip direction N
Sense of slip reverse
Rupture top (km) 0
Rupture bottom (km) 15
Rake (degrees) 90
Length (km) 11
MODEL VALUES
Probability of activity 1
Minimum magnitude 6.5
Maximum magnitude 6.80
b-value 0.8
Assigned Dip Fault-Parallel Slip Rate Width Annual Rate a-value
60 3.24e-04 n/a
Comments
The characteristic magnitude for this fault is fixed at M6.8 based on average offset observed in trenching investigations. Characteristic rate is fixed at 3.24E-4.