2008 National Seismic Hazard Maps-Fault parameters
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Fault Name State
San Gabriel California
GEOMETRY
Dip (degrees) 61
Dip direction N
Sense of slip strike slip
Rupture top (km) 0
Rupture bottom (km) 15
Rake (degrees) 180
Length (km) 71
MODEL VALUES
Slip Rate 1
Probability of activity 1
  ELLSWORTH HANKS
Minimum magnitude 6.5 6.5
Maximum magnitude 7.30 7.20
b-value 0.8 0.8
Fault Model Deformation
Model
Char Rate1 GR-a-value1 Weight
Stitched 2.1 3.24e-04 / 4.57e-04 1.698 / 1.798 0.50
UnStitched 2.1 3.24e-04 / 4.57e-04 1.698 / 1.798 0.50
Stitched 2.4 3.24e-04 / 4.57e-04 1.698 / 1.798 0.50
UnStitched 2.4 3.24e-04 / 4.57e-04 1.698 / 1.798 0.50
1 1st Value is based on Ellsworth relation and 2nd value is based on Hanks and Bakun relation
Comments
Poorly constrained long-term slip rate reported by Yeats and others (1994). Slip rates range from 1-3 mm/yr but Holocene slip rates are thought to be closer to the lower value.