USGS Centroid Moment Solution

NEW IRELAND REGION, P.N.G.

13/07/07 18:35:30.79

Epicenter:  -3.923  153.920
MW 7.3

USGS CENTROID MOMENT TENSOR
13/07/07 18:35:58.20
Centroid:  -3.655  153.878
Depth 398         No. of sta:186
Moment Tensor;   Scale 10**20 Nm
  Mrr=-1.18       Mtt= 0.30
  Mpp= 0.89       Mrt= 0.30
  Mrp= 0.14       Mtp=-0.40
 Principal axes:
  T  Val=  1.09  Plg= 0  Azm= 63
  N        0.18      14      333
  P       -1.27      76      155

Best Double Couple:Mo=1.2*10**20
 NP1:Strike=320 Dip=47 Slip=-109
 NP2:       167     46       -71

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