USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS REGION

13/02/08 09:09:01.59

Epicenter: -10.914  164.741
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth   6         No. of sta: 51
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.65       Mtt= 0.80
  Mpp= 0.85       Mrt=-0.19
  Mrp= 0.98       Mtp= 0.90
 Principal axes:
  T  Val=  1.84  Plg=10  Azm=310
  N        0.24      21      216
  P       -2.07      66       64

Best Double Couple:Mo=2.0*10**17
 NP1:Strike= 64 Dip=39 Slip= -56
 NP2:       202     59      -115

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