USGS WPhase Moment Solution

NEW BRITAIN REGION, P.N.G.

12/11/14 23:41:53.00

Epicenter:  -5.743  151.557
MW 5.6

USGS/WPHASE CENTROID MOMENT TENSOR
12/11/14 23:41:53.00
Centroid:   -5.943  151.758
Depth  25         No. of sta: 29
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.46       Mtt=-2.17
  Mpp=-0.29       Mrt= 2.02
  Mrp= 1.11       Mtp=-0.76
 Principal axes:
  T  Val=  3.39  Plg=67  Azm=324
  N     = -0.05       4       66
  P     = -3.34      21      157

Best Double Couple:Mo=3.4*10**17
 NP1:Strike=256 Dip=24 Slip= 101
 NP2:        64     67        85

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.