NCSS Moment Tensor Solution

Solution reviewed by Claire Doody

Moment Tensor Diagram

Variance Reduction vs Depth plot
Hypocentral Location:
Event ID73834441
Origin Time2023/01/20 08:01:15
Latitude41.1280
Longitude-123.8753
Depth (TT)25.3 km
Depth (MT; not authoritative)27 km

Magnitudes:
Md4.11 (not authoritative)
Ml3.81 (not authoritative)
Mw4.26 (authoritative)

Principal Axes:
Scale1.0E+22 Dyne-cm
AxisValuePlungeAzimuth
T3.17624.63186.521
N-0.13762.582238.633
P-3.03911.290351.269

Source Composition:
TypePercent
DC91
CLVD9
Iso(null)
Moment Tensor (Aki & Richards Convention):
Mo3.11e+22 Dyne-cm
Mxx-2.853e+22 Dyne-cm
Mxy5.845e+21 Dyne-cm
Mxz-4.744e+21 Dyne-cm
Myy2.526e+22 Dyne-cm
Myz1.338e+22 Dyne-cm
Mzz3.270e+21 Dyne-cm
Variance Reduction86%
Version number3
Solution time2023/01/20 18:20:59 UTC

Best-fit Double Couple Solution
PlaneStrikeRakeDip
NP12212681
NP212717064

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