USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS REGION

13/02/06 10:33:17.65

Epicenter: -10.635  164.846
MW 6.0

USGS MOMENT TENSOR SOLUTION
Depth  20         No. of sta:  8
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.31       Mtt= 0.89
  Mpp=-1.20       Mrt= 0.01
  Mrp=-0.62       Mtp=-0.02
 Principal axes:
  T  Val=  0.89  Plg= 3  Azm=  1
  N        0.53      70       99
  P       -1.42      20      270

Best Double Couple:Mo=1.2*10**18
 NP1:Strike= 48 Dip=74 Slip=-168
 NP2:       314     78       -16

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