USGS WPhase Moment Solution

NEW IRELAND REGION, P.N.G.

13/ 4/23 23:14:42.00

Epicenter:  -3.919  152.126
MW 6.5

USGS/WPHASE CENTROID MOMENT TENSOR
13/ 4/23 23:14:42.00
Centroid:   -3.719  152.226
Depth  15         No. of sta: 65
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.61       Mtt= 6.79
  Mpp=-7.39       Mrt=-3.00
  Mrp=-0.78       Mtp= 1.55
 Principal axes:
  T  Val=  8.20  Plg=22  Azm=173
  N     = -0.61      67        2
  P     = -7.59       3      264

Best Double Couple:Mo=7.9*10**18
 NP1:Strike=311 Dip=72 Slip=  14
 NP2:       217     77       162

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.