2008 National Seismic Hazard Maps-Fault parameters
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Fault Name State
Stonewall anticline Washington
GEOMETRY
Dip (degrees) 60
Dip direction NE
Sense of slip reverse
Rupture top (km) 0
Rupture bottom (km) 15
Rake (degrees) 90
Length (km) 30
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 0.58 17.3 5.12e-04 1.648
Selected References
Yeats,R.S., Kulm,L.D., Goldfinger,C., McNeill,L.C., 1998, Stonewall Anticline—An active fold on the Oregon continental shelf: Geological Society of America Bulletin, v. 110, p. 572-587.