USGS WPhase Moment Solution

GUERRERO, MEXICO

12/11/15  9:20:23.00

Epicenter:  18.406 -100.373
MW 6.1

USGS/WPHASE CENTROID MOMENT TENSOR
12/11/15  9:20:23.00
Centroid:   18.406 -100.268
Depth  60         No. of sta: 64
Moment Tensor;   Scale 10**18 Nm
  Mrr=-1.60       Mtt= 1.10
  Mpp= 0.50       Mrt=-0.39
  Mrp=-0.16       Mtp=-0.45
 Principal axes:
  T  Val=  1.36  Plg= 5  Azm=206
  N     =  0.31       9      115
  P     = -1.68      79      326

Best Double Couple:Mo=1.5*10**18
 NP1:Strike=307 Dip=40 Slip= -75
 NP2:       108     51      -101

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.