USGS Centroid Moment Solution

SANTA CRUZ ISLANDS

12/09/05 13:09:08.44

Epicenter: -12.510  166.497
MW 6.0

USGS CENTROID MOMENT TENSOR
12/09/05 13:09:29.90
Centroid: -12.735  166.432
Depth  40         No. of sta: 31
Moment Tensor;   Scale 10**18 Nm
  Mrr=-1.17       Mtt= 0.18
  Mpp= 0.98       Mrt=-0.35
  Mrp=-0.46       Mtp=-0.64
 Principal axes:
  T  Val=  1.36  Plg= 6  Azm= 63
  N        0.05      23      155
  P       -1.41      66      320

Best Double Couple:Mo=1.4*10**18
 NP1:Strike=353 Dip=55 Slip= -62
 NP2:       130     44      -124

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