2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Death Valley (No)	California

GEOMETRY
Dip (degrees)	90
Dip direction	V
Sense of slip	strike slip
Rupture top (km)	0
Rupture bottom (km)	13
Rake (degrees)	180
Length (km)	107

MODEL VALUES
Slip Rate	5
Probability of activity	1
	ELLSWORTH	HANKS
Minimum magnitude	6.5	6.5
Maximum magnitude	7.30	7.30
b-value	0.8	0.8

Fault Model	Deformation Model	Char Rate¹	GR-a-value¹	Weight
UnStitched	2.1	1.87e-03 / 1.87e-03	2.459 / 2.459	0.50
UnStitched	2.4	1.87e-03 / 1.87e-03	2.459 / 2.459	0.50

¹ 1^st Value is based on Ellsworth relation and 2^nd value is based on Hanks and Bakun relation

Comments
Late Pleistocene slip rate based on offset alluvial fan near Redwall Canyon. Rate of about 4.5mm/yr estimated from 46m rl offset reported by Reynolds (1969) and estimated age of incision of fan surface (5-20ka) based on geomorphic expression of alluvial deposits and correlation of rock varnish ages in southern Death Valley by Dorn (1988). Slip rate of 5-12mm/yr reported by Klinger and Piety (1994) may be too high because of their assumption that Redwall Canyon alluvial fan surface is 40-70ka. Cation-ratio dates of rock varnish in southern Death Valley reported by Dorn (1988) suggest age of 100-170ka, which would reduce mean rate from 8.5mm/yr to .5mm/yr.

Comments

Late Pleistocene slip rate based on offset alluvial fan near Redwall Canyon. Rate of about 4.5mm/yr estimated from 46m rl offset reported by Reynolds (1969) and estimated age of incision of fan surface (5-20ka) based on geomorphic expression of alluvial deposits and correlation of rock varnish ages in southern Death Valley by Dorn (1988). Slip rate of 5-12mm/yr reported by Klinger and Piety (1994) may be too high because of their assumption that Redwall Canyon alluvial fan surface is 40-70ka. Cation-ratio dates of rock varnish in southern Death Valley reported by Dorn (1988) suggest age of 100-170ka, which would reduce mean rate from 8.5mm/yr to .5mm/yr.