USGS WPhase Moment Solution

EASTERN NEW GUINEA REG, PAPUA NEW GUINEA

13/02/01  2:17:23.1

Epicenter:  -6.917  147.665
MW 5.8

USGS/WPHASE CENTROID MOMENT TENSOR
13/02/01 02:17:23.10
Centroid:   -6.917  147.967
Depth  11         No. of sta:  7
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.05       Mtt=-4.97
  Mpp= 6.03       Mrt= 2.36
  Mrp= 1.76       Mtp= 1.57
 Principal axes:
  T  Val=  6.82  Plg=15  Azm=280
  N     = -0.69      61       40
  P     = -6.12      23      183

Best Double Couple:Mo=6.5*10**17
 NP1:Strike=324 Dip=62 Slip=-173
 NP2:       231     84       -28

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.