USGS WPhase Moment Solution

NEW BRITAIN REGION, P.N.G.

12/12/15 19:30: 3

Epicenter:  -4.724  152.963
MW 6.1

USGS/WPHASE CENTROID MOMENT TENSOR
12/12/15 19:30: 3.00
Centroid:   -4.724  152.963
Depth  60         No. of sta: 47
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.37       Mtt=-1.28
  Mpp=-0.09       Mrt= 0.78
  Mrp= 0.23       Mtp= 0.19
 Principal axes:
  T  Val=  1.63  Plg=71  Azm=328
  N     = -0.12      10       92
  P     = -1.51      14      185

Best Double Couple:Mo=1.6*10**18
 NP1:Strike=290 Dip=32 Slip= 110
 NP2:        87     60        78

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.