USGS WPhase Moment Solution

NEAR N COAST OF NEW GUINEA, PNG.

11/ 7/31 23:38:57.00

Epicenter:  -3.569  144.843
MW 6.6

USGS/WPHASE CENTROID MOMENT TENSOR
11/ 7/31 23:38:57.00
Centroid:   -3.269  144.543
Depth  17         No. of sta: 40
Moment Tensor;   Scale 10**18 Nm
  Mrr=-2.46       Mtt= 0.42
  Mpp= 2.04       Mrt=-0.51
  Mrp= 2.21       Mtp= 8.97
 Principal axes:
  T  Val= 10.37  Plg= 5  Azm=311
  N     = -1.99      71      204
  P     = -8.38      17       43

Best Double Couple:Mo=9.5*10**18
 NP1:Strike= 86 Dip=73 Slip=  -8
 NP2:       179     82      -163

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.