2008 National Seismic Hazard Maps - Source Parameters

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Fault Name	State
East Mount Sheridan faults	Wyoming

GEOMETRY
Dip (degrees)	40/60/50
Dip direction	E
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	15
Rake (degrees)	-90
Length (km)	22

MODEL VALUES
Probability of activity	1
Minimum magnitude	6.5
Maximum magnitude	6.64
b-value	0.8

Assigned Dip	Fault-Parallel Slip Rate	Width	Annual Rate	a-value	Branch Weight
40	2.18	23.3	3.30e-03	2.577	0.2
50	1.83	19.6	2.32e-03	2.425	0.6
60	1.62	17.3	1.82e-03	2.318	0.2

Comments
The preferred vertical slip rate is based 9.6 m of vertical offset of a mid-Holocene fan. Dip of fault changed to 50? based on redefined regional default value (Lund, 2006).

Selected References
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, ugspub.nr.utah.gov/publications/open_file_reports/OFR-477.pdf.