USGS Body-Wave Moment Tensor Solution


11/09/15 19:31:02.75

Epicenter: -21.559 -179.368
MW 7.3

Depth 629         No. of sta: 69
Moment Tensor;   Scale 10**20 Nm
  Mrr=-0.17       Mtt= 0.75
  Mpp=-0.58       Mrt=-0.53
  Mrp=-0.60       Mtp=-0.11
 Principal axes:
  T  Val=  1.01  Plg=27  Azm=173
  N        0.09      40       57
  P       -1.10      38      286

Best Double Couple:Mo=1.1*10**20
 NP1:Strike=314 Dip=41 Slip= -10
 NP2:        52     84      -130

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