2008 National Seismic Hazard Maps

2008 National Seismic Hazard Maps-Fault parameters

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Fault Name	State
Hat Creek-McArthur-Mayfield	California

GEOMETRY
Dip (degrees)	60
Dip direction	W
Sense of slip	normal
Rupture top (km)	0
Rupture bottom (km)	10
Rake (degrees)	-90
Length (km)	97

MODEL VALUES
Slip Rate	1.5
Probability of activity	1
	ELLSWORTH	HANKS
Minimum magnitude	6.5	6.5
Maximum magnitude	7.20	7.10
b-value	0.8	0.8

Fault Model	Deformation Model	Char Rate¹	GR-a-value¹	Weight
Stitched	2.1	6.13e-04 / 8.66e-04	1.925 / 2.033	0.50
UnStitched	2.1	6.13e-04 / 8.66e-04	1.925 / 2.033	0.50
Stitched	2.4	6.13e-04 / 8.66e-04	1.925 / 2.033	0.50
UnStitched	2.4	6.13e-04 / 8.66e-04	1.925 / 2.033	0.50

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

Comments
Poorly to moderately constrained slip rate for Hat Creek fault based on offset of Tioga lateral moraine reported by Muffler and others (1994) and Sawyer (p.c. 1995). Poorly constrained slip rate for McArthur fault based on offset of "Popcorn Cave basalt" (Page, 1995). Moderate to well-constrained slip rate for Mayfield fault based on vertical offset of 10.6-ka basalt and surveyed scarp profiles (Donnelly-Nolan and others, 1990).

Comments

Poorly to moderately constrained slip rate for Hat Creek fault based on offset of Tioga lateral moraine reported by Muffler and others (1994) and Sawyer (p.c. 1995). Poorly constrained slip rate for McArthur fault based on offset of "Popcorn Cave basalt" (Page, 1995). Moderate to well-constrained slip rate for Mayfield fault based on vertical offset of 10.6-ka basalt and surveyed scarp profiles (Donnelly-Nolan and others, 1990).