USGS WPhase Moment Solution

VANUATU

12/12/21 22:28:9.00

Epicenter: -14.382  167.259
MW 6.7

USGS/WPHASE CENTROID MOMENT TENSOR
12/12/21 22:28: 9.00
Centroid:  -14.282  166.949
Depth 210         No. of sta: 52
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.21       Mtt=-0.11
  Mpp=-1.09       Mrt=-0.31
  Mrp= 0.03       Mtp= 0.33
 Principal axes:
  T  Val=  1.27  Plg=77  Azm=175
  N     = -0.07      12      341
  P     = -1.20       3       72

Best Double Couple:Mo=1.2*10**19
 NP1:Strike=175 Dip=43 Slip= 108
 NP2:       330     49        73

Moment Tensor Solution
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away from the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.

Moment Tensor Solution

Details on the W-phase inversion algorithm.