USGS Body-Wave Moment Tensor Solution

NEW IRELAND REGION, P.N.G.

13/07/07 18:35:30.79

Epicenter:  -3.923  153.920
MW 7.2

USGS MOMENT TENSOR SOLUTION
Depth 387         No. of sta: 58
Moment Tensor;   Scale 10**19 Nm
  Mrr=-6.52       Mtt= 0.61
  Mpp= 5.91       Mrt= 1.58
  Mrp=-0.40       Mtp=-1.97
 Principal axes:
  T  Val=  6.62  Plg= 4  Azm= 71
  N        0.23      11      340
  P       -6.85      78      180

Best Double Couple:Mo=6.7*10**19
 NP1:Strike=330 Dip=50 Slip=-105
 NP2:       173     42       -73

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