USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/11 09:40:23.45

Epicenter: -11.055  166.778
MW 5.6

USGS MOMENT TENSOR SOLUTION
Depth   5         No. of sta: 47
Moment Tensor;   Scale 10**17 Nm
  Mrr=-3.96       Mtt= 2.24
  Mpp= 1.72       Mrt= 0.50
  Mrp= 0.21       Mtp=-1.09
 Principal axes:
  T  Val=  3.11  Plg= 2  Azm= 38
  N        0.91       6      308
  P       -4.02      84      149

Best Double Couple:Mo=3.6*10**17
 NP1:Strike=134 Dip=43 Slip= -82
 NP2:       303     47       -98

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