2008 National Seismic Hazard Maps - Fault Parameters

2007 National Seismic Hazard Maps-Fault parameters

Fault Name	State
Abert Rim fault	Oregon

MODEL VALUES
Slip rate (vertical or horizontal in mm/yr)	0.5
Probability of activity	1

Minimum magnitude	6.5
Maximum magnitude	7

FAULT GEOMETRY
Dip (degrees)	50/60/40
Dip direction	W
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	15
Rake (degrees)	-90
Length (km)	45

Assigned Dip	Fault Parallel Slip Rate	Width	Characteristic Magnitude	Characteristic Rate	Weight
40	0.78	23.3	7	6.98E-04	0.2
50	0.65	19.6	7	4.92E-04	0.6
60	0.58	17.3	7	3.85E-04	0.2

Comments




The assigned vertical slip rate is from Pezzopane (1993) and Pezzopane and Weldon (1993). They cite an estimated age of 16 ka and offset measurements of 8 m in latest Pleistocene pluvial deposits to calculate a slip rate of 0.5 mm/yr. Dip of fault changed to 50° based on redefined regional default value (Lund, 2006).
Selected References




Pezzopane, S.K., and Weldon, R.J., II, 1993, Tectonic role of active faulting in central Oregon: Tectonics, v. 12, p. 1140-1169. Pezzopane, S.K., 1993, Active faults and earthquake ground motions in Oregon: Eugene, Oregon, University of Oregon, unpublished Ph.D. dissertation, 208 p. Lund, W.R., ed., 2006, Basin and Range Province Earthquake Working Group seismic-hazard recommendations to the U.S. Geological Survey National Seismic Hazard Mapping Program: Utah Geological Survey Open-File Report 477, 23 p.