2008 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Mission Ridge-Arroyo Parida-Santa Ana California
GEOMETRY
Dip (degrees) 70
Dip direction S
Sense of slip reverse
Rupture top (km) 0
Rupture bottom (km) 8
Rake (degrees) 90
Length (km) 69
MODEL VALUES
Slip Rate 0.4
Probability of activity 1
  ELLSWORTH HANKS
Minimum magnitude 6.5 6.5
Maximum magnitude 6.90 6.70
b-value 0.8 0.8
Fault Model Deformation
Model
Char Rate1 GR-a-value1 Weight
Stitched 2.1 2.39e-04 / 4.78e-04 1.430 / 1.807 0.50
UnStitched 2.1 2.39e-04 / 4.78e-04 1.430 / 1.807 0.50
Stitched 2.4 2.39e-04 / 4.78e-04 1.430 / 1.807 0.50
UnStitched 2.4 2.39e-04 / 4.78e-04 1.430 / 1.807 0.50
1 1st Value is based on Ellsworth relation and 2nd value is based on Hanks and Bakun relation
Comments
Minimum dip-slip rate based on Rockwell and others (1984). Assumption that half of 65-km-long fault ruptures. Total length includes More Ranch fault. Includes Mission Ridge, Arroyo Parida and Santa Ana faults, renamed based on Seller and Gurrola, (2000).