Hypocentral Location:

Event ID	30217691
Origin Time	1999/02/18 08:58:42
Latitude	38.7797
Longitude	-122.7708
Depth (TT)	3.9 km
Depth (MT; not authoritative)	5 km fixed

Magnitudes:

Ma	3.89 (not authoritative)
Md	4.22 (not authoritative)
Mw	4.15 (authoritative)

Principal Axes:

Scale	1.0E+22 Dyne-cm
Axis	Value	Plunge	Azimuth
T	2.651	2.745	290.188
N	-1.138	74.428	30.095
P	-1.514	15.316	199.435

Source Composition:

Type	Percent
DC	14
CLVD	86
Iso	(null)

Moment Tensor (Aki & Richards Convention):

Mo	2.08e+22 Dyne-cm
Mxx	-9.985e+21 Dyne-cm
Mxy	-1.334e+22 Dyne-cm
Mxz	1.529e+21 Dyne-cm
Myy	2.154e+22 Dyne-cm
Myz	-1.382e+21 Dyne-cm
Mzz	-1.155e+22 Dyne-cm
Variance Reduction	63%
Version number	66
Solution time	2013/01/08 00:28:05 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	244	-13	81
NP2	336	-171	77

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