USGS WPhase Moment Solution

EASTERN NEW GUINEA REG., P.N.G.

11/12/14  5: 4:56.00

Epicenter:  -7.507  146.790
MW 7.1

USGS/WPHASE CENTROID MOMENT TENSOR
11/12/14  5: 4:56.00
Centroid:   -7.507  146.589
Depth 140         No. of sta: 40
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.21       Mtt=-1.66
  Mpp= 1.87       Mrt=-0.93
  Mrp= 4.59       Mtp= 1.08
 Principal axes:
  T  Val=  5.55  Plg=38  Azm=272
  N     = -0.99      21      164
  P     = -4.56      44       52

Best Double Couple:Mo=5.1*10**19
 NP1:Strike= 66 Dip=21 Slip=  -8
 NP2:       164     87      -111

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.