USGS Centroid Moment Solution


12/02/02 13:34:42.32

Epicenter: -17.801  167.077
MW 7.1

12/02/02 13:35:04.20
Centroid: -16.915  167.096
Depth  23         No. of sta: 183
Moment Tensor;   Scale 10**19 Nm
  Mrr=-3.23       Mtt=-0.96
  Mpp= 4.18       Mrt=-1.24
  Mrp= 2.53       Mtp= 2.26
 Principal axes:
  T  Val=  5.49  Plg=13  Azm=287
  N       -0.55      31      189
  P       -4.94      56       37

Best Double Couple:Mo=5.2*10**19
 NP1:Strike= 51 Dip=42 Slip= -39
 NP2:       173     65      -125

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