USGS Centroid Moment Solution


12/03/09 07:09:53.43

Epicenter: -19.115  169.643
MW 6.7

12/03/09 07:10:12.59
Centroid: -18.928  169.366
Depth  16         No. of sta: 44
Moment Tensor;   Scale 10**19 Nm
  Mrr=-1.10       Mtt= 0.39
  Mpp= 0.70       Mrt=-0.23
  Mrp=-0.39       Mtp=-0.60
 Principal axes:
  T  Val=  1.18  Plg= 4  Azm= 54
  N        0.07      19      145
  P       -1.25      70      311

Best Double Couple:Mo=1.2*10**19
 NP1:Strike=341 Dip=52 Slip= -65
 NP2:       124     44      -118

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