Hypocentral Location:

Event ID	21344222
Origin Time	2004/02/18 20:37:46
Latitude	38.8367
Longitude	-122.7672
Depth (TT)	2.6 km
Depth (MT; not authoritative)	3.5 km fixed

Magnitudes:

Md	4.12 (not authoritative)
Ml	4.27 (not authoritative)
Mw	4.58 (authoritative)

Principal Axes:

Scale	1.0E+22 Dyne-cm
Axis	Value	Plunge	Azimuth
T	9.103	26.091	308.468
N	0.507	12.165	44.528
P	-9.610	60.812	157.227

Source Composition:

Type	Percent
DC	89
CLVD	11
Iso	(null)

Moment Tensor (Aki & Richards Convention):

Mo	9.36e+22 Dyne-cm
Mxx	1.145e+22 Dyne-cm
Mxy	-2.518e+22 Dyne-cm
Mxz	6.084e+22 Dyne-cm
Myy	4.397e+22 Dyne-cm
Myz	-4.326e+22 Dyne-cm
Mzz	-5.541e+22 Dyne-cm
Variance Reduction	68%
Version number	9
Solution time	2013/08/25 01:21:34 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	229	-77	72
NP2	12	-125	22

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