USGS WPhase Moment Solution

VANUATU

12/10/20 23: 0:32.00

Epicenter: -13.572  166.594
MW 6.2

USGS/WPHASE CENTROID MOMENT TENSOR
12/10/20 23: 0:32.00
Centroid:  -13.372  166.491
Depth  40         No. of sta: 51
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.82       Mtt=-0.13
  Mpp=-1.69       Mrt=-0.55
  Mrp= 1.84       Mtp=-1.02
 Principal axes:
  T  Val=  2.89  Plg=59  Azm=234
  N     = -0.19      22        9
  P     = -2.70      19      107

Best Double Couple:Mo=2.8*10**18
 NP1:Strike=230 Dip=32 Slip= 136
 NP2:       360     68        65

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.