USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/08 15:26:38.95

Epicenter: -10.917  165.977
MW 7.0

USGS MOMENT TENSOR SOLUTION
Depth  24         No. of sta: 72
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.08       Mtt= 0.23
  Mpp=-0.16       Mrt= 0.16
  Mrp= 0.66       Mtp=-3.29
 Principal axes:
  T  Val=  3.37  Plg= 6  Azm=224
  N       -0.00      78      342
  P       -3.36      10      133

Best Double Couple:Mo=3.4*10**19
 NP1:Strike=178 Dip=87 Slip= -11
 NP2:       269     79      -177

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