USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/06 13:54:53.66

Epicenter: -10.788  166.504
MW 5.8

USGS MOMENT TENSOR SOLUTION
Depth   7         No. of sta: 26
Moment Tensor;   Scale 10**17 Nm
  Mrr=-5.61       Mtt= 0.01
  Mpp= 5.60       Mrt=-1.60
  Mrp= 0.13       Mtp=-0.78
 Principal axes:
  T  Val=  5.72  Plg= 2  Azm=262
  N        0.31      15      171
  P       -6.03      75      359

Best Double Couple:Mo=5.9*10**17
 NP1:Strike=  6 Dip=45 Slip= -69
 NP2:       158     49      -110

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