USGS WPhase Moment Solution


12/11/17  2:51:24.00

Epicenter: -15.026  167.426
MW 5.6

12/11/17  2:51:24.00
Centroid:  -14.926  167.218
Depth 120         No. of sta: 24
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.98       Mtt= 0.37
  Mpp=-3.35       Mrt=-0.51
  Mrp= 0.24       Mtp=-0.32
 Principal axes:
  T  Val=  3.09  Plg=78  Azm=193
  N     =  0.29      11        4
  P     = -3.38       1       94

Best Double Couple:Mo=3.2*10**17
 NP1:Strike=196 Dip=44 Slip= 106
 NP2:       354     48        75

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.