USGS WPhase Moment Solution

11/10/21 17:57:17.00

Epicenter: -28.941 -176.045
MW 7.4

USGS/WPHASE CENTROID MOMENT TENSOR
11/10/21 17:57:17.00
Centroid:  -28.641 -175.705
Depth  50         No. of sta: 39
Moment Tensor;   Scale 10**20 Nm
  Mrr= 1.28       Mtt=-0.00
  Mpp=-1.27       Mrt= 0.08
  Mrp=-0.19       Mtp=-0.76
 Principal axes:
  T  Val=  1.31  Plg=80  Azm= 41
  N     =  0.32       9      204
  P     = -1.64       2      294

Best Double Couple:Mo=1.5*10**20
 NP1:Strike= 34 Dip=43 Slip= 104
 NP2:       196     48        78

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.