Hypocentral Location:

Event ID	21078341
Origin Time	2000/01/18 23:26:01
Latitude	38.7515
Longitude	-122.9135
Depth (TT)	6.8 km
Depth (MT; not authoritative)	8 km fixed

Magnitudes:

Ma	4.21 (not authoritative)
Md	4 (not authoritative)
Ml	4.22 (not authoritative)
Mw	4.2 (authoritative)

Principal Axes:

Scale	1.0E+22 Dyne-cm
Axis	Value	Plunge	Azimuth
T	2.349	9.407	131.717
N	0.310	54.693	28.189
P	-2.659	33.667	228.053

Source Composition:

Type	Percent
DC	77
CLVD	23
Iso	(null)

Moment Tensor (Aki & Richards Convention):

Mo	2.50e+22 Dyne-cm
Mxx	2.699e+21 Dyne-cm
Mxy	-2.009e+22 Dyne-cm
Mxz	6.969e+21 Dyne-cm
Myy	2.782e+21 Dyne-cm
Myz	1.264e+22 Dyne-cm
Mzz	-5.481e+21 Dyne-cm
Variance Reduction	83%
Version number	3
Solution time	2013/01/08 06:23:09 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	4	-148	74
NP2	264	-19	59

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