Hypocentral Location:

Event ID	21056120
Origin Time	1999/09/29 06:22:03
Latitude	41.3713
Longitude	-123.4310
Depth (TT)	37.0 km
Depth (MT; not authoritative)	33 km

Magnitudes:

Ma	4.09 (not authoritative)
Md	4.19 (not authoritative)
Ml	3.99 (not authoritative)
Mw	3.89 (authoritative)

Principal Axes:

Scale	1.0E+21 Dyne-cm
Axis	Value	Plunge	Azimuth
T	8.381	0.170	255.886
N	0.333	13.499	345.927
P	-8.715	76.500	165.176

Source Composition:

Type	Percent
DC	92
CLVD	8
Iso	(null)

Moment Tensor (Aki & Richards Convention):

Mo	8.55e+21 Dyne-cm
Mxx	3.509e+20 Dyne-cm
Mxy	2.025e+21 Dyne-cm
Mxz	1.980e+21 Dyne-cm
Myy	7.871e+21 Dyne-cm
Myz	-5.487e+20 Dyne-cm
Mzz	-8.221e+21 Dyne-cm
Variance Reduction	50%
Version number	2
Solution time	2023/02/13 21:58:48 UTC

Best-fit Double Couple Solution

Plane	Strike	Rake	Dip
NP1	179	-71	47
NP2	333	-109	46

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