Electronic Supplement to
Fault Parameter Constraints Using Relocated Earthquakes: A Validation of First Motion Focal Mechanism Data

by Debi Kilb and Jeanne Hardebeck

Repeating Cluster #2

• Located on the San Andreas Fault, at approximately: -121.23° 36.62° 4.1 km depth.
• Of the two possible nodal planes we choose the plane most consistent with the general trend of seismicity in the region.

Strike (314° expected)	Dip (85° expected)	Rake (±180° expected)	Method	Event ID #	FPFIT’s STDR [assumed high quality if >0.65]	HASH’s FPU [assumed high quality if ≤35°]
316°	77°	193°	HASH	506342	--	30.00
308°	74°	205°	HASH	100242	--	43.00
317°	84°	183°	HASH	30067442	--	30.00
320°	72°	198°	HASH	75872	--	38.50
318°	110°	-164.78°	NCEDC/FPFIT	506342	0.71	--
320°	90°	170.00°	NCEDC/FPFIT	30067442	0.67	--
335°	123°	-122.73°	NCEDC/FPFIT	75872	0.57	--

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