USGS WPhase Moment Solution

SOUTH OF FIJI ISLANDS

11/07/29  7:42:23

Epicenter: -23.636  179.805
MW 6.7

USGS/WPHASE CENTROID MOMENT TENSOR
11/07/29 07:42:23.00
Centroid:  -23.636  179.805
Depth 520         No. of sta: 44
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.11       Mtt=-1.14
  Mpp= 0.03       Mrt=-0.54
  Mrp=-0.46       Mtp=-0.21
 Principal axes:
  T  Val=  1.35  Plg=69  Azm=120
  N     = -0.02      13      252
  P     = -1.33      14      346

Best Double Couple:Mo=1.3*10**19
 NP1:Strike= 95 Dip=33 Slip= 116
 NP2:       245     61        74

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.