Hypocentral Location:

Event ID	21002575
Origin Time	1999/02/18 08:58:36
Latitude	38.7850
Longitude	-122.7702
Depth (TT)	2.2 km
Depth (MT; not authoritative)	1.5 km

Magnitudes:

Ma	2.02 (not authoritative)
Md	3.82 (not authoritative)
Ml	3.92 (not authoritative)
Mw	4.22 (authoritative)

Principal Axes:

Scale	10**22 Dyne-cm
Axis	Value	Plunge	Azimuth
T	2.487	23	99
N	0.419	42	347
P	-2.906	39	209

Source Composition:

Type	Percent
DC	71
CLVD	29
Iso	(null)

Moment Tensor:

Mo	2.70e+22 Dyne-cm
Mxx	-1.079e+22 Dyne-cm
Mxy	-1.122e+22 Dyne-cm
Mxz	1.306e+22 Dyne-cm
Myy	1.671e+22 Dyne-cm
Myz	1.514e+22 Dyne-cm
Mzz	-5.912e+21 Dyne-cm
Variance Reduction	67%
Version number	6
Solution time	2011/07/06 23:23:12 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	337	-133	80
NP2	237	-14	44

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