USGS WPhase Moment Solution

VANUATU

11/ 8/20 18:19:24.00

Epicenter: -18.287  168.132
MW 7.1

USGS/WPHASE CENTROID MOMENT TENSOR
11/ 8/20 18:19:24.00
Centroid:  -18.087  167.816
Depth  35         No. of sta: 30
Moment Tensor;   Scale 10**19 Nm
  Mrr= 4.17       Mtt=-0.33
  Mpp=-3.84       Mrt= 1.88
  Mrp=-2.93       Mtp= 1.36
 Principal axes:
  T  Val=  5.46  Plg=69  Azm= 46
  N     =  0.04       6      155
  P     = -5.50      19      248

Best Double Couple:Mo=5.5*10**19
 NP1:Strike=350 Dip=26 Slip= 106
 NP2:       152     65        82

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.