USGS Centroid Moment Solution


12/12/02 00:54:22.47

Epicenter: -16.976  167.625
MW 6.2

12/12/02 00:54:46.90
Centroid: -17.200  167.672
Depth  40         No. of sta:  8
Moment Tensor;   Scale 10**18 Nm
  Mrr= 2.11       Mtt=-1.00
  Mpp=-1.11       Mrt= 0.73
  Mrp=-0.17       Mtp= 1.03
 Principal axes:
  T  Val=  2.27  Plg=77  Azm=355
  N       -0.10      10      133
  P       -2.17       8      225

Best Double Couple:Mo=2.2*10**18
 NP1:Strike=126 Dip=54 Slip=  78
 NP2:       326     38       106

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