2008 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Santa Cruz Island California
GEOMETRY
Dip (degrees) 90
Dip direction V
Sense of slip strike slip
Rupture top (km) 0
Rupture bottom (km) 13
Rake (degrees) 30
Length (km) 69
MODEL VALUES
Slip Rate 1
Probability of activity 1
  ELLSWORTH HANKS
Minimum magnitude 6.5 6.5
Maximum magnitude 7.20 7.00
b-value 0.8 0.8
Fault Model Deformation
Model
Char Rate1 GR-a-value1 Weight
Stitched 2.1 3.51e-04 / 6.99e-04 1.682 / 1.910 0.50
UnStitched 2.1 3.51e-04 / 6.99e-04 1.682 / 1.910 0.50
Stitched 2.4 3.51e-04 / 6.99e-04 1.682 / 1.910 0.50
UnStitched 2.4 3.51e-04 / 6.99e-04 1.682 / 1.910 0.50
1 1st Value is based on Ellsworth relation and 2nd value is based on Hanks and Bakun relation
Comments
Moderately constrained Quaternary slip rate (0.75mm/yr) based on offset streams incised into Stage 11 (?) terrace (Pinter and others, 1995).