Hypocentral Location:

Event ID	21426829
Origin Time	2004/12/12 09:13:34
Latitude	40.6965
Longitude	-123.8673
Depth (TT)	27.5 km
Depth (MT; not authoritative)	27 km fixed

Magnitudes:

Md	4.29 (not authoritative)
Mw	4.42 (authoritative)

Principal Axes:

Scale	1.0E+22 Dyne-cm
Axis	Value	Plunge	Azimuth
T	5.221	9.267	276.874
N	0.356	63.467	167.801
P	-5.577	24.625	11.163

Source Composition:

Type	Percent
DC	87
CLVD	13
Iso	(null)

Moment Tensor (Aki & Richards Convention):

Mo	5.40e+22 Dyne-cm
Mxx	-4.295e+22 Dyne-cm
Mxy	-1.494e+22 Dyne-cm
Mxz	-2.112e+22 Dyne-cm
Myy	4.843e+22 Dyne-cm
Myz	-1.203e+22 Dyne-cm
Mzz	-5.479e+21 Dyne-cm
Variance Reduction	72%
Version number	1
Solution time	2009/10/20 00:07:45 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	146	-155	80
NP2	51	-11	66

Waveform data (solid line) and synthetic data (dashed line) from the moment tensor inversion: