USGS WPhase Moment Solution

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

12/04/17  7:13:50

Epicenter:  -5.482  147.101
MW 6.8

USGS/WPHASE CENTROID MOMENT TENSOR
12/04/17 07:13:50.00
Centroid:   -5.582  147.000
Depth 210         No. of sta: 31
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.51       Mtt=-1.95
  Mpp= 0.44       Mrt= 0.55
  Mrp=-0.73       Mtp= 0.56
 Principal axes:
  T  Val=  1.90  Plg=64  Azm= 81
  N     =  0.32      22      289
  P     = -2.21      10      194

Best Double Couple:Mo=2.1*10**19
 NP1:Strike=259 Dip=39 Slip=  52
 NP2:       124     60       117

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.