Hypocentral Location:

Event ID	21221952
Origin Time	2002/04/18 11:35:41
Latitude	38.7908
Longitude	-122.7742
Depth (TT)	2.3 km
Depth (MT; not authoritative)	3.5 km fixed

Magnitudes:

Ma	3.59 (not authoritative)
Md	3.52 (not authoritative)
Ml	3.54 (not authoritative)
Mw	3.98 (authoritative)

Principal Axes:

Scale	1.0E+21 Dyne-cm
Axis	Value	Plunge	Azimuth
T	11.638	16.517	113.398
N	0.147	58.188	354.840
P	-11.785	26.352	211.845

Source Composition:

Type	Percent
DC	98
CLVD	2
Iso	(null)

Moment Tensor (Aki & Richards Convention):

Mo	1.17e+22 Dyne-cm
Mxx	-5.101e+21 Dyne-cm
Mxy	-8.144e+21 Dyne-cm
Mxz	2.788e+21 Dyne-cm
Myy	6.376e+21 Dyne-cm
Myz	5.379e+21 Dyne-cm
Mzz	-1.275e+21 Dyne-cm
Variance Reduction	79%
Version number	3
Solution time	2013/09/02 17:39:10 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	344	-149	84
NP2	250	-8	59

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