USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/08 11:12:13.42

Epicenter: -10.910  165.891
MW 6.8

USGS MOMENT TENSOR SOLUTION
Depth  18         No. of sta: 71
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.13       Mtt= 1.18
  Mpp=-1.05       Mrt= 0.10
  Mrp= 0.05       Mtp=-1.31
 Principal axes:
  T  Val=  1.79  Plg= 2  Azm= 25
  N       -0.13      86      261
  P       -1.66       3      115

Best Double Couple:Mo=1.7*10**19
 NP1:Strike=160 Dip=86 Slip=  -1
 NP2:       250     89      -176

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